digital PID controller Research Papers (original) (raw)

In recent years, rapid economic development has increased the ownership of cars and as result road accidents have grown rapidly. However, autonomous cars can reduce roads accidents effectively by maintaining a safety distance from the vehicle ahead. The core of such vehicles are sensors, which provide information about cars surrounding, as well as control systems that employ sensor input to adjust driving parameters. The main purpose of this paper is designing and implementation of reversing sensor and control system for an autonomous model car. The operational principle behind the design is to have a flashing LED, the light of which is reflected back from a close proximity object into a photodiode. The signal detected from the photodiode is fed via signal conditioning electronics, which includes circuits for current to voltage converter, signal amplification and filtering, into a digital PID controller to control the speed of the vehicle. Multisim and Matlab simulations were perfor...

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- Autonomous Vehicles, PID controller design, digital PID controller, Pid Controller
- by E. Tedeschi and +1
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- Digital Control, High Frequency, digital PID controller, Field Programmable Gate Array
- by Edno Gentilho Jr.
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- digital PID controller, Microcontroller, Pid Controller
- by Brian Fabien
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- Applied Mathematics, Optimal Control, digital PID controller, Active Control
- by Alex Van den Bossche
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- Engineering, Power System, Digital Control, Industrial

Os diversos sistemas de controle vêm sofrendo grandes mudanças nos
últimos anos pois o avanço dos sistemas digitais e computadores possibilita uma nova abordagem de tais sistema. Tal abordagem permite a utilização de sistemas micro controlados e/ou micro processados para o design de sistemas de controle digitais também chamado de sistemas de controle moderno.
Neste trabalho trabalharemos com a análise de alguns métodos de
sintonia de controladores largamente difundido no mercado. Tal análise será desenvolvida em termos de uma implementação digital dos controladores em um algoritmo com um loop trabalhando a equação de diferenças do sistema com auxílio do software MatLab da empresa MathWorks.

- by Plinio Andrade
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- digital PID controller, Digital Filter Design
- by Angel de Castro and +1
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- Digital Control, digital PID controller, Field Programmable Gate Array, High performance
- by Peter Breedveld
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- Mechatronics, Polymorphism, Numerical Analysis, Controller Design

El presente documento muestra el proceso de creación y sintonización de un controlador PID para una planta. Dicho controlador está configurado para trabajar en tiempo discreto, esto quiere decir que es un controlador digital. Además mediante el método gráfico se buscara conocer las constantes de Kp, Ki y Kd para una sintonización óptima de dicho controlador. Se utilizara la herramienta Matlab para comprobar el comportamiento de la planta a una respuesta escalón y dicho programa servirá para comprobar la diferencia de los sistemas en tiempo continuo y en tiempo discreto.

DC/DC converters are massively used for switch-mode regulated power supply, renewable energy conversion systems and electrical drives. Conventionally analog methods were popular for control of these converters. This paper elucidates a digital controller using digital filter architecture, which supports fixed-point algorithm. Digital controller application to DC/DC converters has always been considered because of their superiority over analog controller. In digital controller, the control strategy can be altered or reprogrammed without the need of significant hardware changes. The digital controller improves response of DC-DC converter by varying loop-gain, cross-over frequency and phase margin. Closed loop digital control of buck and boost converter is presented and the results are obtained for varying operating conditions and verified using MATLAB/Simulink.

- by Amjad Khashan
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- Engineering, Nonlinear dynamics, Mathematical Sciences, digital PID controller
- by John Leete
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- Digital Control, digital PID controller, Oscillations, Phase Noise

This paper presents the design, simulation and real-time implementation of an aircraft longitudinal control system using a test platform constituted of a dedicated microprocessor and the X-Plane flight simulator. Initially, the concepts of longitudinal motion of a rigid body are studied. The dynamic equations of aircraft were determined using the aerodynamic stability coefficients and the longitudinal derivates. With the aircraft dynamic equation, the altitude and vertical speed continuous controllers were designed using the inner loop pitch attitude and pitch rate feedback and the forward speed controller was designed using an engine throttle model. The continuous controllers designed were discretized. Then, the digital controllers were implemented in the microprocessor. Using the X-Plane flight simulator and the algorithm implemented in the dedicated microprocessor, the digital controllers were tested and validated into the model similar to real aircraft, minimizing risks and increasing flexibility for design changes. Basically, this experimental framework employs the microprocessor running the digital flight controllers to be tested, and a PC running the X-Plane flight simulator contained the aircraft to be commanded. These resources are interconnected through data buses in order to exchange information. The interconnection between autopilot hardware and the X-Plane host is made through data communication bus based on network protocol, Uniform Datagram Protocol (UDP) available in both systems. The X-Plane has the built-in capability of transmitting flight parameters and receiving command for aircraft flight control surfaces over Ethernet using UDP. The results show that the developed system structure is appropriate to test the longitudinal controllers. Matlab environment was used to visualize the values of the updates pitch attitude, altitude, vertical and forward speed in graphics plotted in real time. It permites to observe that the designed controllers impleme- - nted in experimental framework reaches the specified requirements successfully.

- by chandrasekhar guluru
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- Power Electronics, System Integration, VLSI, Digital Control
- by malabika basu
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- Power Electronics, Power Quality, Service Quality, Flow Control
- by Minh Vu
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- Control system, Haptic Interface Design, digital PID controller, Legged Locomotion
- by A. Abrishamifar
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- digital PID controller, Low Power Electronics, Circuit Design, Power Dissipation

... Energy Conversion System Connected to Utility Grid Mahmoud MN Amin, Student Member, IEEE, OA Mohammed, Fellow, IEEE Florida International University, ECE Dept. Energy Systems Research Laboratory Miami, FL 33174 USA R ...

- by Mahmoud Amin
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- Renewable Energy, Control system, Wind Power, Wind turbine
- by P. Siarry and +1
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- Microelectronics, MEMS, Power Electronics, Analog Circuit Design
- by azura che soh
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- Fuzzy Logic, Intelligent Control, Neural Network, digital PID controller
- by Matheus Estimer
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- Biomedical Engineering, Hybrid Systems, Wireless Sensor Networks, Digital Control

Design a nonlinear controller for second order nonlinear uncertain dynamical systems is one of
the most important challenging works. This paper focuses on the design, implementation and
analysis of a chattering free sliding mode controller for highly nonlinear dynamic PUMA robot
manipulator and compare to computed torque controller, in presence of uncertainties. In order to
provide high performance nonlinear methodology, sliding mode controller and computed torque
controller are selected. Pure sliding mode controller and computed torque controller can be used
to control of partly known nonlinear dynamic parameters of robot manipulator. Conversely, pure
sliding mode controller is used in many applications; it has an important drawback namely;
chattering phenomenon which it can causes some problems such as saturation and heat the
mechanical parts of robot manipulators or drivers. In order to reduce the chattering this research
is used the linear saturation function boundary layer method instead of switching function method
in pure sliding mode controller. These simulation models are developed as a part of a software
laboratory to support and enhance graduate/undergraduate robotics courses, nonlinear control
courses and MATLAB/SIMULINK courses at research and development company (SSP Co.)
research center, Shiraz, Iran.

- by FARZIN PILTAN and +1
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- Electronic Engineering, Robotics, Dynamical Systems, Fuzzy Logic

This paper expands a sliding mode fuzzy controller which sliding surface gain is optimized by Gradient Descent Optimization Algorithm (GDOA). The main goal is to guarantee acceptable trajectories tracking between the second order nonlinear system (robot manipulator) actual and the desired trajectory. The fuzzy controller in proposed sliding mode fuzzy controller is based on Mamdani’s fuzzy inference system (FIS) and it has one input and one output. The input represents the function between sliding function, error and the rate of error. The outputs represent torque, respectively. The GDOA is the most prominent iterative method for solving sparse systems of nonlinear equations. The GDOA is a composite of simple, elegant ideas that almost anyone can understand. Pure sliding mode fuzzy controller has difficulty in handling unstructured model uncertainties. To solve this problem applied GDOA to sliding mode fuzzy controller for adjusting the sliding surface gain ( ). Since the sliding surface gain ( ) is adjusted by GDOA, it is nonlinear and continuous. GDOA sliding mode fuzzy controller is stable model-free controller which eliminates the chattering phenomenon without to use the boundary layer saturation function. Lyapunov stability is proved in GDOA sliding mode fuzzy controller based on switching (sign) function. This controller has acceptable performance in presence of uncertainty (e.g., overshoot=0.1%, rise time=0.6 second, steady state error = 1.1e-9 and RMS error=1.8e-9).

- by FARZIN PILTAN and +1
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- Electronic Engineering, Robotics, Control Systems Engineering, Artificial Intelligence

This paper describes a communication architecture for a digital controller based on DSP-FPGA to be used in power electronic systems. For high rate transmissions, the proposed architecture has an USB bus implemented with a minimum use of the DSP core, using enhanced direct memory access and external memory interface modules of a TMS320C6713 high performance DSP and Cypress EZ-USB SX2trade high-speed USB interface device. Moreover, this architecture has CAN-bus communications to expand system with others subsystem, and a compact flash interface to storage data and DSP program, improving platform to boot alone. Host side has an application interface programmed in C with multithreading to process all data due high speed transfers.

- by Carlos Giron
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- Signal Processing, Power Electronics, Digital Control, digital PID controller
- by milan milanovic
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- Mechanical Engineering, Applied Mathematics, Hybrid Systems, Modeling

An integrated-circuit implementation of an eight channel audio mixer is presented. This architecture utilizes a novel cascaded R-xR ladder. The requirements for such an IC have emerged to satisfy a generic need for such a function, particularly in professional audio and multimedia systems. Specifically, the IC described is an 8×2 mixer-eight voltage inputs and two voltage outputs. Each input has an attenuation control with 1 dB steps up to 63 dB maximum attenuation and can be steered to either, both or neither (mute) left/right output mixers. Design considerations are presented for optimum Total Harmonic Distortion (THD) and the particular design achieves a THD of 0.01%. The chip has been implemented on an advanced BiCMOS process with complementary MOS, bipolar transistors and oxide capacitors in an area of less than 12.5 mm2

- by Evaldo M Miranda
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- Digital Control, digital PID controller, Impedance, Chip
- by G. Garcera
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- Engineering, Power System, digital PID controller, Power system control
- by Ting Li
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- Mechanical Engineering, Stress, Sensor Arrays, Micromachining
- by yu pan
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- digital PID controller, Power Consumption, Rf Power Amplifier, Oscillations
- by Uffe Borup
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- Power Electronics, Power Quality, Robust control, Digital Control

Delay-controlled CMOS delay lines have been proved useful in a number of applications, notably the digitization of short time intervals. This paper introduces a new kind of CMOS delay line, in which the delay element is an array of capacitors controlled by a digital signal vector. This choice allows for a robust implementation of the circuitry controlling the delay generation, while the maximum speed attainable by the line is high compared to the maximum speed achieved by other delay line architectures. The delay line presented here was designed to produce an accurately tunable 16 × 0.5ns delay under large temperature, supply voltage, and technological process quality variations.

A novel design of gas sensor using low temperature cofired ceramics (LTCC) and thin film technologies is presented. The LTCC structure is composed essentially of two ceramic layers with interlayer thick film Pt heater, interdigitated electrodes on top, contact pads and metallic connections realised by vias. The thin films of both SnO2 and In2O3, intentionally doped and activated, were deposited

- by Wojciech Maziarz
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- Engineering, Technology, Heat Treatment, digital PID controller
- by Ronny Cacau
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- High Voltage, digital PID controller, Theoretical Analysis, Control Strategy

We present the status of the Sardinia Radio Telescope (SRT) project, a new general purpose, fully steerable 64 m diameter parabolic radiotelescope capable to operate with high efficiency in the 0.3-116 GHz frequency range. The instrument... more

- by Jader Monari
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- Radio Astronomy, Proceedings, digital PID controller, Ministry of Education

- by younis alshareef and +1
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- Autonomous Vehicles, PID controller design, digital PID controller, Reversing sensor
- by Muammer Nalbant and +1
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- Surface Roughness, digital PID controller, Numerical Control, Materials Design

Many software development organizations struggle to make informed decisions when investing in new software technologies. The authors' experimental framework can help companies evaluate a new software technology by examining its features... more

- by Kurt Wallnau
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- Business, Information Systems, Aerospace Engineering, Software Engineering
- by Abdelali El Aroudi
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- Power Electronics, Modeling, Digital Control, Stability
- by DAVID VAQUERO
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- Engineering, Low Frequency, High Frequency, digital PID controller