Jean Mbihi - Academia.edu (original) (raw)
Papers by Jean Mbihi
Journal of Engineering Sciences and Innovation, Dec 20, 2022
This paper presents a novel instrumentation device for instantaneous digital acquisition and proc... more This paper presents a novel instrumentation device for instantaneous digital acquisition and processing, of the urine flow absorbed by a textile medium. The proposed device is smart version of a basic instrument studied in previous research works. Arduino framework is used as the development tool of the main C++ instrumentation sketch for ESP32 microchip target. The proposed smart device owes its novelty to many relevant factors including a hardware simplicity of the unary sensor, a multilevel alerting strategy, as well as a multivariable monitoring process. In the wireless side, a serial Bluetooth terminal application is used as driver for smartphone-based virtual monitoring of involved output variables. Furthermore, an experimental workbench built for testing the proposed device is presented. Finally, the technical characteristics and experimental results obtained and presented in the paper, show the innovative nature of the proposed device for bioinstrumentation engineering.
This paper presents a design methodology and a virtual simulation framework, of the optimal feedb... more This paper presents a design methodology and a virtual simulation framework, of the optimal feedback control scheme for DCM ( duty-cycle modulation ) Buck choppers . The transfer function of an open loop DCM chopper, is built from the numerical analysis of a virtual step response, with Ref = 2 volts as step control input. Then, the optimal PID controller for DCM Buck Choppers is formulated and synthetized as a LQR ( Linear Quadratic Regulator ) equivalent control, and the associated Riccati equations is easily solvable using Matlab/LQR tool. As a relevant implication, the parameters of the corresponding optimal PID, are straightforwardly obtained from the LQR gains according to a LQR/PID equivalence principle, which is proven for a relevant class of second order dynamic systems. In addition, in order to show the feasibility of the designed optimal PID control scheme, a whole prototyping DCM Buck chopper with given operating conditions ( main DC supplied (12 V), load resistance ...
Iranian journal of electrical and computer engineering, 2005
In this paper, a class of new Duty-Cycle Modulators (DCM) is investigated. Although the duty-cycl... more In this paper, a class of new Duty-Cycle Modulators (DCM) is investigated. Although the duty-cycle involved in each case is a nonlinear function of the control signal, a numerical analysis indicates that one could develop an excellent linear approximation for an appropriate choice of design parameters. The class of DCM proposed combines duty-cycle modulation and analog signal processing techniques in a single operational amplifier circuit. Simulations are conducted under constant and variable controls using Electronic Work Bench in order to test and validate the proposed class of modulation circuits. As an implication, the class of signal conditioning systems investigated in this study will have a number of applications in industrial instrumentation.
Journal of Engineering Sciences and Innovation, Dec 20, 2022
This paper presents a novel instrumentation device for instantaneous digital acquisition and proc... more This paper presents a novel instrumentation device for instantaneous digital acquisition and processing, of the urine flow absorbed by a textile medium. The proposed device is smart version of a basic instrument studied in previous research works. Arduino framework is used as the development tool of the main C++ instrumentation sketch for ESP32 microchip target. The proposed smart device owes its novelty to many relevant factors including a hardware simplicity of the unary sensor, a multilevel alerting strategy, as well as a multivariable monitoring process. In the wireless side, a serial Bluetooth terminal application is used as driver for smartphone-based virtual monitoring of involved output variables. Furthermore, an experimental workbench built for testing the proposed device is presented. Finally, the technical characteristics and experimental results obtained and presented in the paper, show the innovative nature of the proposed device for bioinstrumentation engineering.
This paper presents a design methodology and a virtual simulation framework, of the optimal feedb... more This paper presents a design methodology and a virtual simulation framework, of the optimal feedback control scheme for DCM (duty-cycle modulation) Buck choppers. The transfer function of an open loop DCM chopper, is built from the numerical analysis of a virtual step response, with Ref = 2 volts as step control input. Then, the optimal PID controller for DCM Buck Choppers is formulated and synthetized as a LQR (Linear Quadratic Regulator) equivalent control, and the associated Riccati equations is easily solvable using Matlab/LQR tool. As a relevant implication, the parameters of the corresponding optimal PID, are straightforwardly obtained from the LQR gains according to a LQR/PID equivalence principle, which is proven for a relevant class of second order dynamic systems. In addition, in order to show the feasibility of the designed optimal PID control scheme, a whole prototyping DCM Buck chopper with given operating conditions (main DC supplied (12 V), load resistance (3.3 Ω), basic DCM frequency (30 kHz)), is virtually implemented and well tested using Multisim. The virtual simulation results obtained from numerous operating conditions (e.g., open loop, closed loop, load variations), are presented and discussed. Furthermore, relevant results and findings are reported, e.g., transient characteristics (i.e. controllability, stability, overshoot (4%), and time response (1.5 ms) and static performance levels (e.g. static error (0 %), high robustness under 50 % load variations). These results are a great challenge for the first virtual DCM Buck chopper, operating under a well-tested optimal PID-based control policy.
In this paper, a low cost duty-cycle modulation scheme is studied in depth and compared to the st... more In this paper, a low cost duty-cycle modulation scheme is studied in depth and compared to the standard pulse width modulation technique. Using a mix of analytical reasoning and electronics simulation tools, it is shown that under the same operating conditions, most characteristics of the proposed duty-cycle modulation scheme are better than those provided by a standard pulse width modulation technique. The simulation results obtained when testing both modulation control policies on prototyping systems, indicate that the proposed duty-cycle modulation approach, appears to be a high quality control policy in a wide variety of application areas, including A/D and D/A conversion, signal transmission and switching control in power electronics.
In this paper, a FPGA-based Analog-To-Digital conversion (ADC) architecture via ODCM (optimal dut... more In this paper, a FPGA-based Analog-To-Digital conversion (ADC) architecture via ODCM (optimal duty-cycle modulation), is designed and implemented using software and hardware co-simulation platforms. The software platform consists of Simulink/Xilinx-based system generator blocks in which the ODCM-ADC is implemented, and of Xilinx ISE programing tool for FPGA chips. The hardware platform consists of Zynq 7000 FPGA Kit (25 MHz sampling clock), equipped with an embedded second order FPGA-based digital IIR (infinite impulse response) decimation filter, and with a PC-based JTAG communication cable/connectors. The co-simulation systems, are built and successfully tested for 3 KHz modulating bandwidth. The resulting normalized characteristics are given by: SNR = 49.55 dB, SFDR = 41,19 dB and Noise Floor Range =140 dB. These performance levels obtained under virtual and hardware co-simulation conditions, show a relevant challenge of ODCM-ADC, compared to most types of oversampling ADC techni...
Cahiers du GERAD, 1999
... Furthermore, the case of a single machine producing multiple part-types has been investigated... more ... Furthermore, the case of a single machine producing multiple part-types has been investigated by El-Férik, Malhamé and Boukas [32], and Perkins and Srikant [33, 34], while Lehoczky, Sethi, Soner and Taksar [35], Caramanis, Liberopoulos [36], Liberopoulos and Camaranis ...
The input-output and state feedback control of nonlinear systems has been the object of a number ... more The input-output and state feedback control of nonlinear systems has been the object of a number of applications in robotics, chemical and biochemical processes, and electric motors for instance. Here we consider the application of input-output linearisation to a laboratory-scale autonomous power system. The control problem considered here is multivariable and consists of controlling the power system frequency and the load voltage by acting on the excitation voltage and on the dc motor voltage. The nonlinear dynamical model has been derived by using the Lagrange laws and has been validated with experimental data. The nonlinear dynamical model has been used for the derivation of the input-output decoupling linearising controller. The stability of the zero dynamics is analysed, and the performance of the linearising controller is illustrated by simulation results.
International Journal of Innovation and Applied Studies, Nov 2, 2021
This work focuses on the structure of the duty cycle modulator analog-to-digital converter. We pr... more This work focuses on the structure of the duty cycle modulator analog-to-digital converter. We propose to model again its complete chain, this time by parallelizing its demodulator filter. More specifically, we want to optimize the performance of this type of converter that no longer needs to make this proof in the field of real-time digital conversion. Thus, we will thanks to the so-called residue method, make parallel the classic demodulation filter and thereby obtain a new conversion chain. Following up with software tools such as MATLAB; System Generator and ISE Xilinx, we implement and simulate this new analog/digital converter chain with duty cycle modulator. After this implementation and simulation which uses as input signal, a sinusoid at a frequency of f = 30Hz, the results obtained show us that it is more judicious and advantageous to use this new conversion chain because with a quadratic error E = 0.8208, we do not lose the quality of the signal but we save in hardware resources; with a harmonic distortion rate THD = 0.6099, we have a type of converter that further reduces harmonics, and offers us a demodulation time saving of about 76,2%.
International journal of innovation and scientific research, Aug 2, 2021
This article concerns the study of a measuring instrument controlled by ESP 32 with local monitor... more This article concerns the study of a measuring instrument controlled by ESP 32 with local monitoring of biological parameters providing information on the state of scarring of human skin with 2nd degree burns; A brief review of the literature on existing or deployed therapeutic techniques and means for people suffering from 2nd degree burns is presented and allowed us to study the characteristics that led to the establishment of an architecture of the new proposed biomedical instrument. This electronic instrument consists of: a dimensional sensor (depth and thickness) of the wound; a sensor for humidity and thermal states (hypothermia and hyperthermia); a cardiac parameter acquisition sensor, a microcontroller mini-card which manages the A / D conversion and digital processing of measured biological quantities, with monitoring of these quantities on an LCD display. The virtual simulation results with a functional aspect obtained are validated in the PROTEUS software of said instrument, which are presented and then interpreted, prove to be satisfactory; the experimental workshop and the main results obtained are presented. These give very good results since in addition to the completely stable acquisition of biological parameters, the proposed system does not interfere with devices emitting electromagnetic radiation. Thus, a first prototype of this proposed instrument was produced, with a view to embedding it in a new biomedical therapeutic suit for people with 2nd degree burns.
This paper presents a dynamic architecture of digital duty-cycle modulation control drivers. Comp... more This paper presents a dynamic architecture of digital duty-cycle modulation control drivers. Compared to most oversampling digital modulation schemes encountered in industrial electronics, its novelty is founded on a number of relevant merits including; embedded positive and negative feedback loops, internal modulation clock, structural simplicity, elementary building operators, no explicit need of samples of the nonlinear duty-cycle function when computing the switching modulated signal, and minimum number of design parameters. A prototyping digital control driver is synthesized and well tested within MATLAB/Simulink workspace. Then, the virtual simulation results and performance obtained under a sample of relevant instrumentation and control systems are presented, in order to show the feasibility, the reliability, and the versatility of target applications, of the proposed class of low cost and high quality digital control drivers in industrial electronics.
This paper presents an optimal duty-cycle modulation (ODCM) scheme for analog-to-digital conversi... more This paper presents an optimal duty-cycle modulation (ODCM) scheme for analog-to-digital conversion (ADC) systems. The overall ODCM-Based ADC problem is decoupled into optimal DCM and digital filtering sub-problems, while taking into account constraints of mutual design parameters between the two. Using a set of three lemmas and four morphological theorems, the ODCM sub-problem is modelled as a nonlinear cost function with nonlinear constraints. Then, a weighted least p<sup>th</sup> norm of the error between ideal and predicted frequency responses is used as a cost function for the digital filtering sub-problem. In addition, MATLAB <em>fmincon</em> and MATLAB <em>iirlnorm </em>tools are used as optimal DCM and least p<sup>th</sup> norm solvers respectively. Furthermore, the <em>virtual simulation</em> scheme of an overall prototyping ODCM-based ADC system is implemented and well tested with the help of Simulink tool accordi...
This paper presents an original PC-Based Workbench for virtual instrumentation and automatic cont... more This paper presents an original PC-Based Workbench for virtual instrumentation and automatic control. Its software platform results from a mix of Matlab Graphical User Interface (GUI) design and Matlab Executable (MEX) C++ programming. It is shown how a sophisticated custom MEX C++ control library, callable from Matlab GUI application, has been built from the C++ driver of an arbitrary data acquisition board. The varieties of simulation and experimentation modes provided include: digital-to-digital controls, digital-to-analog and analog-to-digital conversion, open loop control, and Matlab GUI/MEX controllers. A sample of simulated and experimental results obtained and presented, shows the great merit of the proposed well tested PC-based workbench in control engineering education. Key-Words: PC-Based Workbench, Virtual instrumentation, Automatic control, Matlab GUI, MEX-C++, mexFunction, data acquisition board, Advanced Programming, Matlab/MEX controllers.
WSEAS Transactions on Circuits and Systems archive, 2018
In this paper, the chaotic phenomena are outlined in a class of simple NRO (negative resistance o... more In this paper, the chaotic phenomena are outlined in a class of simple NRO (negative resistance oscillator) or NCO (negative conductance oscillator) equivalently. Compared to most chaotic electronic schemes encountered in nonlinear dynamic systems theory and practice, the proposed class of chaotic circuits consists of simple piecewise linear NRO/NCO, involving a minimum number of building components and dynamic states. The feasibility of relevant chaotic phenomena is proven from the existence of their Van Der Pol dynamic models according to the least square estimation principle. Then, despite the simplicity of the 2nd order NRO/NCO, a relevant parameterization strategy associated with virtual simulation techniques, are used as key exploration means for creating relevant chaotic phenomena. Therefore, new strange chaotic attractors with 2D/3D shapes are created and presented. Moreover, a comparative study with a sample of existing chaotic NRO/NCO schemes, show that the proposed class ...
The electronic instrument studied in this paper is a novel model of arbitrary waveform and wavele... more The electronic instrument studied in this paper is a novel model of arbitrary waveform and wavelet generator. Unlike most programmable instruments designed for the same purpose with high complexity and great cost unfortunately, the proposed testing instrument is founded on a direct synthesis of arbitrary waveform signals including wavelets, from a basis of elementary analog signals. A novel arbitrary signal generation scheme is presented and well tested using virtual simulation and experimentation. Then, the predicted and experimental results obtained under a wide variety of testing conditions are presented, in order to show the great challenge of building a cheaper and high quality workbench for arbitrary signal generators.
This paper presents a review of a multipurpose duty-cycle modulation (DCM) technology . A brief i... more This paper presents a review of a multipurpose duty-cycle modulation (DCM) technology . A brief introduction to switching modulation techniques is presented for the sake of well understanding of the innovative nature of the DCM architecture to be reviewed. The review is organized into numerous relevant application areas, including DCM-based instrumentation systems (i.e., DCM-based analog-to-digital conversion, DCM-based digital-to-analog conversion), DCM-based power electronic drivers (i.e. DCM-based Buck converters, DCM-based Boost converters, DCM-based power electronic inverters), and DCM-based digital transmission systems for arbitrary waveforms. Furthermore, the state-of-art evaluation as well as new research opportunities about the multipurpose DCM technology, are provided in order to outline possible patentable DCM control systems, to be dedicated in the future to electrical and electronics engineering markets .
International Review of Electrical Engineering (IREE), 2020
In this paper, the newly developed “Dual Interphase Power Controller (IPC) 240” technology is use... more In this paper, the newly developed “Dual Interphase Power Controller (IPC) 240” technology is used to increase the reliability of transmission lines for small renewable energy plants. This asymmetric compensation method based on symmetrical components has used two IPC. The first one is placed at the sending end of the line and the second IPC at the receiving end of the line. During normal operation of the transmission line formed, the electrical service continuity is ensured at the load using reactances, which adjust according to the power angle. When a permanent single-phase fault occurs, triggering the circuit breakers of the infected phase, the two IPCs are reconfigured so that the first performs a three-phase / two-phase transformation and the second a two-phase/three-phase transformation of voltage to continue providing a sufficient power for the load. Data from a power transmission line (30 kV-5 MW) from a mini hydroelectric power station has been used in a virtual network under Matlab/Simulink to test the functions dedicated to this technology. The results of the tests obtained and presented show the feasibility of this technology. The efficiency is also guaranteed because the electricity service is 100% assured in the absence of contingency and almost 70% during the contingency of the single-phase short-circuit type.
Http Www Afriquescience Info, 2011
L'objectif de cet article est de montrer comment concevoir un prototype rapide d'amplificateur op... more L'objectif de cet article est de montrer comment concevoir un prototype rapide d'amplificateur opérationnel (AOP) fait à base de la technologie CMOS sur le logiciel de simulation Proteus. Cet AOP est pour l'utilisation intégré des systèmes de détection à silicon strip, Si (Li), CdZnTe et CsI etc. Ce circuit à trois étages permet de réaliser des performances aussi compétitives que celles des précédents amplificateurs opérationnels. Ce système de performance relative a un gain différentiel de 47,90 dB ; une impédance d'entrée de 10 15 Ω ; une impédance de sortie de 25Ω ; un taux de réjection en mode commun 57,80 dB et une vitesse de balayage de 27,5V/µs.
Journal of Engineering Sciences and Innovation, Dec 20, 2022
This paper presents a novel instrumentation device for instantaneous digital acquisition and proc... more This paper presents a novel instrumentation device for instantaneous digital acquisition and processing, of the urine flow absorbed by a textile medium. The proposed device is smart version of a basic instrument studied in previous research works. Arduino framework is used as the development tool of the main C++ instrumentation sketch for ESP32 microchip target. The proposed smart device owes its novelty to many relevant factors including a hardware simplicity of the unary sensor, a multilevel alerting strategy, as well as a multivariable monitoring process. In the wireless side, a serial Bluetooth terminal application is used as driver for smartphone-based virtual monitoring of involved output variables. Furthermore, an experimental workbench built for testing the proposed device is presented. Finally, the technical characteristics and experimental results obtained and presented in the paper, show the innovative nature of the proposed device for bioinstrumentation engineering.
This paper presents a design methodology and a virtual simulation framework, of the optimal feedb... more This paper presents a design methodology and a virtual simulation framework, of the optimal feedback control scheme for DCM ( duty-cycle modulation ) Buck choppers . The transfer function of an open loop DCM chopper, is built from the numerical analysis of a virtual step response, with Ref = 2 volts as step control input. Then, the optimal PID controller for DCM Buck Choppers is formulated and synthetized as a LQR ( Linear Quadratic Regulator ) equivalent control, and the associated Riccati equations is easily solvable using Matlab/LQR tool. As a relevant implication, the parameters of the corresponding optimal PID, are straightforwardly obtained from the LQR gains according to a LQR/PID equivalence principle, which is proven for a relevant class of second order dynamic systems. In addition, in order to show the feasibility of the designed optimal PID control scheme, a whole prototyping DCM Buck chopper with given operating conditions ( main DC supplied (12 V), load resistance ...
Iranian journal of electrical and computer engineering, 2005
In this paper, a class of new Duty-Cycle Modulators (DCM) is investigated. Although the duty-cycl... more In this paper, a class of new Duty-Cycle Modulators (DCM) is investigated. Although the duty-cycle involved in each case is a nonlinear function of the control signal, a numerical analysis indicates that one could develop an excellent linear approximation for an appropriate choice of design parameters. The class of DCM proposed combines duty-cycle modulation and analog signal processing techniques in a single operational amplifier circuit. Simulations are conducted under constant and variable controls using Electronic Work Bench in order to test and validate the proposed class of modulation circuits. As an implication, the class of signal conditioning systems investigated in this study will have a number of applications in industrial instrumentation.
Journal of Engineering Sciences and Innovation, Dec 20, 2022
This paper presents a novel instrumentation device for instantaneous digital acquisition and proc... more This paper presents a novel instrumentation device for instantaneous digital acquisition and processing, of the urine flow absorbed by a textile medium. The proposed device is smart version of a basic instrument studied in previous research works. Arduino framework is used as the development tool of the main C++ instrumentation sketch for ESP32 microchip target. The proposed smart device owes its novelty to many relevant factors including a hardware simplicity of the unary sensor, a multilevel alerting strategy, as well as a multivariable monitoring process. In the wireless side, a serial Bluetooth terminal application is used as driver for smartphone-based virtual monitoring of involved output variables. Furthermore, an experimental workbench built for testing the proposed device is presented. Finally, the technical characteristics and experimental results obtained and presented in the paper, show the innovative nature of the proposed device for bioinstrumentation engineering.
This paper presents a design methodology and a virtual simulation framework, of the optimal feedb... more This paper presents a design methodology and a virtual simulation framework, of the optimal feedback control scheme for DCM (duty-cycle modulation) Buck choppers. The transfer function of an open loop DCM chopper, is built from the numerical analysis of a virtual step response, with Ref = 2 volts as step control input. Then, the optimal PID controller for DCM Buck Choppers is formulated and synthetized as a LQR (Linear Quadratic Regulator) equivalent control, and the associated Riccati equations is easily solvable using Matlab/LQR tool. As a relevant implication, the parameters of the corresponding optimal PID, are straightforwardly obtained from the LQR gains according to a LQR/PID equivalence principle, which is proven for a relevant class of second order dynamic systems. In addition, in order to show the feasibility of the designed optimal PID control scheme, a whole prototyping DCM Buck chopper with given operating conditions (main DC supplied (12 V), load resistance (3.3 Ω), basic DCM frequency (30 kHz)), is virtually implemented and well tested using Multisim. The virtual simulation results obtained from numerous operating conditions (e.g., open loop, closed loop, load variations), are presented and discussed. Furthermore, relevant results and findings are reported, e.g., transient characteristics (i.e. controllability, stability, overshoot (4%), and time response (1.5 ms) and static performance levels (e.g. static error (0 %), high robustness under 50 % load variations). These results are a great challenge for the first virtual DCM Buck chopper, operating under a well-tested optimal PID-based control policy.
In this paper, a low cost duty-cycle modulation scheme is studied in depth and compared to the st... more In this paper, a low cost duty-cycle modulation scheme is studied in depth and compared to the standard pulse width modulation technique. Using a mix of analytical reasoning and electronics simulation tools, it is shown that under the same operating conditions, most characteristics of the proposed duty-cycle modulation scheme are better than those provided by a standard pulse width modulation technique. The simulation results obtained when testing both modulation control policies on prototyping systems, indicate that the proposed duty-cycle modulation approach, appears to be a high quality control policy in a wide variety of application areas, including A/D and D/A conversion, signal transmission and switching control in power electronics.
In this paper, a FPGA-based Analog-To-Digital conversion (ADC) architecture via ODCM (optimal dut... more In this paper, a FPGA-based Analog-To-Digital conversion (ADC) architecture via ODCM (optimal duty-cycle modulation), is designed and implemented using software and hardware co-simulation platforms. The software platform consists of Simulink/Xilinx-based system generator blocks in which the ODCM-ADC is implemented, and of Xilinx ISE programing tool for FPGA chips. The hardware platform consists of Zynq 7000 FPGA Kit (25 MHz sampling clock), equipped with an embedded second order FPGA-based digital IIR (infinite impulse response) decimation filter, and with a PC-based JTAG communication cable/connectors. The co-simulation systems, are built and successfully tested for 3 KHz modulating bandwidth. The resulting normalized characteristics are given by: SNR = 49.55 dB, SFDR = 41,19 dB and Noise Floor Range =140 dB. These performance levels obtained under virtual and hardware co-simulation conditions, show a relevant challenge of ODCM-ADC, compared to most types of oversampling ADC techni...
Cahiers du GERAD, 1999
... Furthermore, the case of a single machine producing multiple part-types has been investigated... more ... Furthermore, the case of a single machine producing multiple part-types has been investigated by El-Férik, Malhamé and Boukas [32], and Perkins and Srikant [33, 34], while Lehoczky, Sethi, Soner and Taksar [35], Caramanis, Liberopoulos [36], Liberopoulos and Camaranis ...
The input-output and state feedback control of nonlinear systems has been the object of a number ... more The input-output and state feedback control of nonlinear systems has been the object of a number of applications in robotics, chemical and biochemical processes, and electric motors for instance. Here we consider the application of input-output linearisation to a laboratory-scale autonomous power system. The control problem considered here is multivariable and consists of controlling the power system frequency and the load voltage by acting on the excitation voltage and on the dc motor voltage. The nonlinear dynamical model has been derived by using the Lagrange laws and has been validated with experimental data. The nonlinear dynamical model has been used for the derivation of the input-output decoupling linearising controller. The stability of the zero dynamics is analysed, and the performance of the linearising controller is illustrated by simulation results.
International Journal of Innovation and Applied Studies, Nov 2, 2021
This work focuses on the structure of the duty cycle modulator analog-to-digital converter. We pr... more This work focuses on the structure of the duty cycle modulator analog-to-digital converter. We propose to model again its complete chain, this time by parallelizing its demodulator filter. More specifically, we want to optimize the performance of this type of converter that no longer needs to make this proof in the field of real-time digital conversion. Thus, we will thanks to the so-called residue method, make parallel the classic demodulation filter and thereby obtain a new conversion chain. Following up with software tools such as MATLAB; System Generator and ISE Xilinx, we implement and simulate this new analog/digital converter chain with duty cycle modulator. After this implementation and simulation which uses as input signal, a sinusoid at a frequency of f = 30Hz, the results obtained show us that it is more judicious and advantageous to use this new conversion chain because with a quadratic error E = 0.8208, we do not lose the quality of the signal but we save in hardware resources; with a harmonic distortion rate THD = 0.6099, we have a type of converter that further reduces harmonics, and offers us a demodulation time saving of about 76,2%.
International journal of innovation and scientific research, Aug 2, 2021
This article concerns the study of a measuring instrument controlled by ESP 32 with local monitor... more This article concerns the study of a measuring instrument controlled by ESP 32 with local monitoring of biological parameters providing information on the state of scarring of human skin with 2nd degree burns; A brief review of the literature on existing or deployed therapeutic techniques and means for people suffering from 2nd degree burns is presented and allowed us to study the characteristics that led to the establishment of an architecture of the new proposed biomedical instrument. This electronic instrument consists of: a dimensional sensor (depth and thickness) of the wound; a sensor for humidity and thermal states (hypothermia and hyperthermia); a cardiac parameter acquisition sensor, a microcontroller mini-card which manages the A / D conversion and digital processing of measured biological quantities, with monitoring of these quantities on an LCD display. The virtual simulation results with a functional aspect obtained are validated in the PROTEUS software of said instrument, which are presented and then interpreted, prove to be satisfactory; the experimental workshop and the main results obtained are presented. These give very good results since in addition to the completely stable acquisition of biological parameters, the proposed system does not interfere with devices emitting electromagnetic radiation. Thus, a first prototype of this proposed instrument was produced, with a view to embedding it in a new biomedical therapeutic suit for people with 2nd degree burns.
This paper presents a dynamic architecture of digital duty-cycle modulation control drivers. Comp... more This paper presents a dynamic architecture of digital duty-cycle modulation control drivers. Compared to most oversampling digital modulation schemes encountered in industrial electronics, its novelty is founded on a number of relevant merits including; embedded positive and negative feedback loops, internal modulation clock, structural simplicity, elementary building operators, no explicit need of samples of the nonlinear duty-cycle function when computing the switching modulated signal, and minimum number of design parameters. A prototyping digital control driver is synthesized and well tested within MATLAB/Simulink workspace. Then, the virtual simulation results and performance obtained under a sample of relevant instrumentation and control systems are presented, in order to show the feasibility, the reliability, and the versatility of target applications, of the proposed class of low cost and high quality digital control drivers in industrial electronics.
This paper presents an optimal duty-cycle modulation (ODCM) scheme for analog-to-digital conversi... more This paper presents an optimal duty-cycle modulation (ODCM) scheme for analog-to-digital conversion (ADC) systems. The overall ODCM-Based ADC problem is decoupled into optimal DCM and digital filtering sub-problems, while taking into account constraints of mutual design parameters between the two. Using a set of three lemmas and four morphological theorems, the ODCM sub-problem is modelled as a nonlinear cost function with nonlinear constraints. Then, a weighted least p<sup>th</sup> norm of the error between ideal and predicted frequency responses is used as a cost function for the digital filtering sub-problem. In addition, MATLAB <em>fmincon</em> and MATLAB <em>iirlnorm </em>tools are used as optimal DCM and least p<sup>th</sup> norm solvers respectively. Furthermore, the <em>virtual simulation</em> scheme of an overall prototyping ODCM-based ADC system is implemented and well tested with the help of Simulink tool accordi...
This paper presents an original PC-Based Workbench for virtual instrumentation and automatic cont... more This paper presents an original PC-Based Workbench for virtual instrumentation and automatic control. Its software platform results from a mix of Matlab Graphical User Interface (GUI) design and Matlab Executable (MEX) C++ programming. It is shown how a sophisticated custom MEX C++ control library, callable from Matlab GUI application, has been built from the C++ driver of an arbitrary data acquisition board. The varieties of simulation and experimentation modes provided include: digital-to-digital controls, digital-to-analog and analog-to-digital conversion, open loop control, and Matlab GUI/MEX controllers. A sample of simulated and experimental results obtained and presented, shows the great merit of the proposed well tested PC-based workbench in control engineering education. Key-Words: PC-Based Workbench, Virtual instrumentation, Automatic control, Matlab GUI, MEX-C++, mexFunction, data acquisition board, Advanced Programming, Matlab/MEX controllers.
WSEAS Transactions on Circuits and Systems archive, 2018
In this paper, the chaotic phenomena are outlined in a class of simple NRO (negative resistance o... more In this paper, the chaotic phenomena are outlined in a class of simple NRO (negative resistance oscillator) or NCO (negative conductance oscillator) equivalently. Compared to most chaotic electronic schemes encountered in nonlinear dynamic systems theory and practice, the proposed class of chaotic circuits consists of simple piecewise linear NRO/NCO, involving a minimum number of building components and dynamic states. The feasibility of relevant chaotic phenomena is proven from the existence of their Van Der Pol dynamic models according to the least square estimation principle. Then, despite the simplicity of the 2nd order NRO/NCO, a relevant parameterization strategy associated with virtual simulation techniques, are used as key exploration means for creating relevant chaotic phenomena. Therefore, new strange chaotic attractors with 2D/3D shapes are created and presented. Moreover, a comparative study with a sample of existing chaotic NRO/NCO schemes, show that the proposed class ...
The electronic instrument studied in this paper is a novel model of arbitrary waveform and wavele... more The electronic instrument studied in this paper is a novel model of arbitrary waveform and wavelet generator. Unlike most programmable instruments designed for the same purpose with high complexity and great cost unfortunately, the proposed testing instrument is founded on a direct synthesis of arbitrary waveform signals including wavelets, from a basis of elementary analog signals. A novel arbitrary signal generation scheme is presented and well tested using virtual simulation and experimentation. Then, the predicted and experimental results obtained under a wide variety of testing conditions are presented, in order to show the great challenge of building a cheaper and high quality workbench for arbitrary signal generators.
This paper presents a review of a multipurpose duty-cycle modulation (DCM) technology . A brief i... more This paper presents a review of a multipurpose duty-cycle modulation (DCM) technology . A brief introduction to switching modulation techniques is presented for the sake of well understanding of the innovative nature of the DCM architecture to be reviewed. The review is organized into numerous relevant application areas, including DCM-based instrumentation systems (i.e., DCM-based analog-to-digital conversion, DCM-based digital-to-analog conversion), DCM-based power electronic drivers (i.e. DCM-based Buck converters, DCM-based Boost converters, DCM-based power electronic inverters), and DCM-based digital transmission systems for arbitrary waveforms. Furthermore, the state-of-art evaluation as well as new research opportunities about the multipurpose DCM technology, are provided in order to outline possible patentable DCM control systems, to be dedicated in the future to electrical and electronics engineering markets .
International Review of Electrical Engineering (IREE), 2020
In this paper, the newly developed “Dual Interphase Power Controller (IPC) 240” technology is use... more In this paper, the newly developed “Dual Interphase Power Controller (IPC) 240” technology is used to increase the reliability of transmission lines for small renewable energy plants. This asymmetric compensation method based on symmetrical components has used two IPC. The first one is placed at the sending end of the line and the second IPC at the receiving end of the line. During normal operation of the transmission line formed, the electrical service continuity is ensured at the load using reactances, which adjust according to the power angle. When a permanent single-phase fault occurs, triggering the circuit breakers of the infected phase, the two IPCs are reconfigured so that the first performs a three-phase / two-phase transformation and the second a two-phase/three-phase transformation of voltage to continue providing a sufficient power for the load. Data from a power transmission line (30 kV-5 MW) from a mini hydroelectric power station has been used in a virtual network under Matlab/Simulink to test the functions dedicated to this technology. The results of the tests obtained and presented show the feasibility of this technology. The efficiency is also guaranteed because the electricity service is 100% assured in the absence of contingency and almost 70% during the contingency of the single-phase short-circuit type.
Http Www Afriquescience Info, 2011
L'objectif de cet article est de montrer comment concevoir un prototype rapide d'amplificateur op... more L'objectif de cet article est de montrer comment concevoir un prototype rapide d'amplificateur opérationnel (AOP) fait à base de la technologie CMOS sur le logiciel de simulation Proteus. Cet AOP est pour l'utilisation intégré des systèmes de détection à silicon strip, Si (Li), CdZnTe et CsI etc. Ce circuit à trois étages permet de réaliser des performances aussi compétitives que celles des précédents amplificateurs opérationnels. Ce système de performance relative a un gain différentiel de 47,90 dB ; une impédance d'entrée de 10 15 Ω ; une impédance de sortie de 25Ω ; un taux de réjection en mode commun 57,80 dB et une vitesse de balayage de 27,5V/µs.