Mario Edgardo Magaña - Academia.edu (original) (raw)
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Papers by Mario Edgardo Magaña
Proceedings of the 17th International Modal Analysis Conference, Mar 1, 1999
In this paper we present an active fuzzy logic control system for a cable-stayed bridge. The purp... more In this paper we present an active fuzzy logic control system for a cable-stayed bridge. The purpose of such control system is to mitigate the vibrations caused by the vertical component of a typical earthquake. We show through computer simulation that, if the fuzzy rules are chosen (designed) properly, the magnitude of such vibrations can be substantially reduced.
This thesis utilizes the second method of Lyapunov to develop several controllers to stabilize di... more This thesis utilizes the second method of Lyapunov to develop several controllers to stabilize discrete-time dynamical systems with or without parameter uncertainties and/or external disturbances. It also uses the notion of a sliding mode on a preferred hyperplane previously developed for continuous-time variable structure control systems to stabilize discrete-time dynamical systems. In particular, feedback controllers are proposed that: (i) stabilize discrete systems with no uncertainties by forcing their state trajectories onto prespecified hyperplanes; (ii) provide a needed level of stability robustness to discrete systems with uncertainties which are modeled by cone bounded functions; (iii) robustly stabilize discrete uncertain systems
IEEE Latin America Transactions, Jun 1, 2012
2005 and 2011, respectively. His research interests include MIMO techniques, channel coding, part... more 2005 and 2011, respectively. His research interests include MIMO techniques, channel coding, particularly LDPC codes and its decoding techniques, network coding for wireless networks, and multi-hop communications.
IEEE Transactions on Instrumentation and Measurement, Sep 1, 2019
We present a dynamic frequency and amplitude estimation algorithm for unbalanced three-phase powe... more We present a dynamic frequency and amplitude estimation algorithm for unbalanced three-phase power systems with harmonics. To develop the algorithm, we first construct a nonlinear dynamic model of the complex representation of the three-phase voltage with harmonic content and then apply an unscented Kalman filter to estimate magnitudes and frequencies of the fundamental component and its harmonics. Performance evaluation of the algorithm via Monte Carlo simulation shows the accurate tracking and fast convergence time when the frequency and amplitude of the grid voltage waveform change continuously or abruptly. Specifically, we benchmark the proposed algorithm with two types of input amplitudes and two types of frequency changes.
IEEE Transactions on Automatic Control, 1988
... dynamical systems described by difference equations. In [6] a controller of the Lyapunov min-... more ... dynamical systems described by difference equations. In [6] a controller of the Lyapunov min-max type is derived for systems which may have an uncertainty that also depends on the control input. In this note we consider the ...
CRC Press eBooks, Jun 18, 2021
2021 IEEE Global Communications Conference (GLOBECOM), Dec 1, 2021
In this paper, we study the secrecy performance of massive multiple-input multiple-output (MIMO) ... more In this paper, we study the secrecy performance of massive multiple-input multiple-output (MIMO) system for a scenario in which a number of BS antennas fail to send/receive any signals rendering them to be a source of additive distortion noise. The secrecy model studied here is based on multiple-input single-output single-eavesdropper (MISOSE) wiretap channel in which a single-antenna eavesdropper performs pilot contamination attack on a target user in order to increase the decodability of the confidential message intended to the target user. A lower bound of the achievable ergodic secrecy rate and a closed form expression for the maximum ratio (MR) precoder are derived. Results show that for the given MISOSE wiretap channel a positive secrecy rate is achievable even when a large number of antennas fail. The study also shows that massive MIMO systems with spatially correlated channels yield higher secrecy rate than with uncorrelated spatial channels albeit the earlier showed to be more impacted by BS antenna failure.
IFAC Proceedings Volumes, 2013
This paper investigates a new alternative approach to compensate for the effects of packet dropou... more This paper investigates a new alternative approach to compensate for the effects of packet dropouts (data do not arrive at destination) on a dynamic networked control system (NCS). The approach uses an observer-based control computation using time-delay predicted values as the sampling times of the NCS. To obtain the predicted values of time delays we propose the use a one-step-ahead and multistep prediction algorithms based on an adaptive time delay neural network (TDNN). The control gains are calculated using optimal control.
Springer eBooks, 1999
In this work we propose the design of an automatic control system for a cablestayed bridge to act... more In this work we propose the design of an automatic control system for a cablestayed bridge to actively counteract external environmental forces generated by earthquakes. The introduction of this intelligent feature in the structure turns an otherwise passive bridge into a smart bridge, capable of reducing the amplitude of the deflections of its deck down to a desired level automatically. The control strategy proposed here uses a subset of the stay cables as active tendons to provide control forces through appropriate actuators. Each individual actuator is controlled by a decentralized controller that uses local linear velocity and local linear relative displacement information only. The effectiveness of the control algorithm herein proposed is tested on a three-dimensional model of the Quincy Bayview bridge [1,2]. This bridge has been chosen because it is fairly representative of the new generation of cable-stayed bridges. The mathematical model is derived using a finite element approach. Although some work has been done in this field by other researchers [3–6], to our knowledge, no results that use three-dimensional full-scale models have been published in the literature.
Ir_ Ihis work wc mathematically reconstruct and document the digital position c_ll_rotlcr imI_lcm... more Ir_ Ihis work wc mathematically reconstruct and document the digital position c_ll_rotlcr imI_lcmcntcd i_ tile control computer of the 3-axis attitudc motion .'_ilJJtJl.;llo.r, since lhe inR)Jmalion supplied with the executable code of Ibis controller was insufficient to make substantial modifications to it. We also develop i_kcthodologics 1o intrt_duce changes in the controller which do not require rewriting _hc software. Finally, recommendations are made on possible imorovement to the COlltro] system pcrf(_rmancc.
This work is the result of a feasibility study performed to establish if an artificial neural con... more This work is the result of a feasibility study performed to establish if an artificial neural controller could be used to achieve joint space trajectory tracking of a two-link robot manipulator. This study is based on the results obtained by Hecht-Nielsen [4], who claims that a functional map can be implemented to a desired degree of accuracy with a three-layer feedforward artificial neural network. Central to this study is the assumption that the robot model as well as its parameters values are known.
IEEE Transactions on Sustainable Energy, Jul 1, 2022
In this paper we present an active fuzzy logic control system for a cable-stayed bridge. The purp... more In this paper we present an active fuzzy logic control system for a cable-stayed bridge. The purpose of such control system is to mitigate the vibrations caused by the vertical component of a typical earthquake. We show through computer simulation that, if the fuzzy rules are chosen (designed) properly, the magnitude of such vibrations can be substantially reduced.
대한토목학회지, May 1, 2012
This report presents the results of the third and final research and development project of an im... more This report presents the results of the third and final research and development project of an implementable wireless travel time data collection system. Utilizing Bluetooth wireless technology as a platform, the prior projects focused on data collection hardware and network communication implementation. In this project the processing and synthesis of collected data was addressed. Results and procedures that address data filtering, travel time sample calculation, calculation of travel time statistics, travel time forecasting are described. Results for the use of collected data to estimate intersection performance are presented, as are the design and requirements for an automated travel time data collection system. The report includes a users' manual.
This project pursued several objectives conducive to the implementation and testing of a Bluetoot... more This project pursued several objectives conducive to the implementation and testing of a Bluetooth (BT) based system to collect travel time data, including the deployment of a BT-based travel time data collection system to perform comprehensive testing on all the components. Two different BT-based travel time data collection systems were installed. The first system, composed of two DCUs, was installed on a corridor located in Salem, OR. Extensive testing was done on this system, including the collection of travel time samples. A second system composed of five DCUs was installed along 99W in the city of Tigard, OR. Very limited data collection was done on 99W due to the lack of network connectivity. Six different antenna types were characterized using the two DCU BT-based travel time data collection system. The result of the antenna characterization tests showed that vertically polarized antennas with gains between 9 and 12 dBi are good candidates to support a BT-based travel time data collection system. Antennas with circular polarization do not seem to improve the performance, despite the lack of control regarding the orientation of BTenabled devices in most applications. Travel time samples were also collected with this system. The results indicate that a trade-off exist between the number of samples obtained and the accuracy of these travel time samples. This trade-off is most likely the result of differences in road coverage areas provided by the different antenna types.
Proceedings of IEEE Systems Man and Cybernetics Conference - SMC
It has been shown that if the uncertainties of a discrete-time dynamic system can be modeled by c... more It has been shown that if the uncertainties of a discrete-time dynamic system can be modeled by cone bounded functions of the states, that such a system can be asymptotically stabilized, depending on the size of the uncertainties, via either deterministic Lyapunov based state or output feedback. Unlike continuous-time dynamic systems, the size of the uncertainties of discrete-time dynamic systems that can be handled can not be arbitrarily large. In this paper, we present an algorithm that enables the designer to construct a Lyapunov function such that the output feedback controller derived from it is capable of handling the largest possible uncertainty, Our approach relies on the construction of a matrix Q that has a structure which facilitates the computation of the maximum uncertainty through the maximization of a judiciously chosen cost function.<<ETX>>
Proceedings of the 17th International Modal Analysis Conference, Mar 1, 1999
In this paper we present an active fuzzy logic control system for a cable-stayed bridge. The purp... more In this paper we present an active fuzzy logic control system for a cable-stayed bridge. The purpose of such control system is to mitigate the vibrations caused by the vertical component of a typical earthquake. We show through computer simulation that, if the fuzzy rules are chosen (designed) properly, the magnitude of such vibrations can be substantially reduced.
This thesis utilizes the second method of Lyapunov to develop several controllers to stabilize di... more This thesis utilizes the second method of Lyapunov to develop several controllers to stabilize discrete-time dynamical systems with or without parameter uncertainties and/or external disturbances. It also uses the notion of a sliding mode on a preferred hyperplane previously developed for continuous-time variable structure control systems to stabilize discrete-time dynamical systems. In particular, feedback controllers are proposed that: (i) stabilize discrete systems with no uncertainties by forcing their state trajectories onto prespecified hyperplanes; (ii) provide a needed level of stability robustness to discrete systems with uncertainties which are modeled by cone bounded functions; (iii) robustly stabilize discrete uncertain systems
IEEE Latin America Transactions, Jun 1, 2012
2005 and 2011, respectively. His research interests include MIMO techniques, channel coding, part... more 2005 and 2011, respectively. His research interests include MIMO techniques, channel coding, particularly LDPC codes and its decoding techniques, network coding for wireless networks, and multi-hop communications.
IEEE Transactions on Instrumentation and Measurement, Sep 1, 2019
We present a dynamic frequency and amplitude estimation algorithm for unbalanced three-phase powe... more We present a dynamic frequency and amplitude estimation algorithm for unbalanced three-phase power systems with harmonics. To develop the algorithm, we first construct a nonlinear dynamic model of the complex representation of the three-phase voltage with harmonic content and then apply an unscented Kalman filter to estimate magnitudes and frequencies of the fundamental component and its harmonics. Performance evaluation of the algorithm via Monte Carlo simulation shows the accurate tracking and fast convergence time when the frequency and amplitude of the grid voltage waveform change continuously or abruptly. Specifically, we benchmark the proposed algorithm with two types of input amplitudes and two types of frequency changes.
IEEE Transactions on Automatic Control, 1988
... dynamical systems described by difference equations. In [6] a controller of the Lyapunov min-... more ... dynamical systems described by difference equations. In [6] a controller of the Lyapunov min-max type is derived for systems which may have an uncertainty that also depends on the control input. In this note we consider the ...
CRC Press eBooks, Jun 18, 2021
2021 IEEE Global Communications Conference (GLOBECOM), Dec 1, 2021
In this paper, we study the secrecy performance of massive multiple-input multiple-output (MIMO) ... more In this paper, we study the secrecy performance of massive multiple-input multiple-output (MIMO) system for a scenario in which a number of BS antennas fail to send/receive any signals rendering them to be a source of additive distortion noise. The secrecy model studied here is based on multiple-input single-output single-eavesdropper (MISOSE) wiretap channel in which a single-antenna eavesdropper performs pilot contamination attack on a target user in order to increase the decodability of the confidential message intended to the target user. A lower bound of the achievable ergodic secrecy rate and a closed form expression for the maximum ratio (MR) precoder are derived. Results show that for the given MISOSE wiretap channel a positive secrecy rate is achievable even when a large number of antennas fail. The study also shows that massive MIMO systems with spatially correlated channels yield higher secrecy rate than with uncorrelated spatial channels albeit the earlier showed to be more impacted by BS antenna failure.
IFAC Proceedings Volumes, 2013
This paper investigates a new alternative approach to compensate for the effects of packet dropou... more This paper investigates a new alternative approach to compensate for the effects of packet dropouts (data do not arrive at destination) on a dynamic networked control system (NCS). The approach uses an observer-based control computation using time-delay predicted values as the sampling times of the NCS. To obtain the predicted values of time delays we propose the use a one-step-ahead and multistep prediction algorithms based on an adaptive time delay neural network (TDNN). The control gains are calculated using optimal control.
Springer eBooks, 1999
In this work we propose the design of an automatic control system for a cablestayed bridge to act... more In this work we propose the design of an automatic control system for a cablestayed bridge to actively counteract external environmental forces generated by earthquakes. The introduction of this intelligent feature in the structure turns an otherwise passive bridge into a smart bridge, capable of reducing the amplitude of the deflections of its deck down to a desired level automatically. The control strategy proposed here uses a subset of the stay cables as active tendons to provide control forces through appropriate actuators. Each individual actuator is controlled by a decentralized controller that uses local linear velocity and local linear relative displacement information only. The effectiveness of the control algorithm herein proposed is tested on a three-dimensional model of the Quincy Bayview bridge [1,2]. This bridge has been chosen because it is fairly representative of the new generation of cable-stayed bridges. The mathematical model is derived using a finite element approach. Although some work has been done in this field by other researchers [3–6], to our knowledge, no results that use three-dimensional full-scale models have been published in the literature.
Ir_ Ihis work wc mathematically reconstruct and document the digital position c_ll_rotlcr imI_lcm... more Ir_ Ihis work wc mathematically reconstruct and document the digital position c_ll_rotlcr imI_lcmcntcd i_ tile control computer of the 3-axis attitudc motion .'_ilJJtJl.;llo.r, since lhe inR)Jmalion supplied with the executable code of Ibis controller was insufficient to make substantial modifications to it. We also develop i_kcthodologics 1o intrt_duce changes in the controller which do not require rewriting _hc software. Finally, recommendations are made on possible imorovement to the COlltro] system pcrf(_rmancc.
This work is the result of a feasibility study performed to establish if an artificial neural con... more This work is the result of a feasibility study performed to establish if an artificial neural controller could be used to achieve joint space trajectory tracking of a two-link robot manipulator. This study is based on the results obtained by Hecht-Nielsen [4], who claims that a functional map can be implemented to a desired degree of accuracy with a three-layer feedforward artificial neural network. Central to this study is the assumption that the robot model as well as its parameters values are known.
IEEE Transactions on Sustainable Energy, Jul 1, 2022
In this paper we present an active fuzzy logic control system for a cable-stayed bridge. The purp... more In this paper we present an active fuzzy logic control system for a cable-stayed bridge. The purpose of such control system is to mitigate the vibrations caused by the vertical component of a typical earthquake. We show through computer simulation that, if the fuzzy rules are chosen (designed) properly, the magnitude of such vibrations can be substantially reduced.
대한토목학회지, May 1, 2012
This report presents the results of the third and final research and development project of an im... more This report presents the results of the third and final research and development project of an implementable wireless travel time data collection system. Utilizing Bluetooth wireless technology as a platform, the prior projects focused on data collection hardware and network communication implementation. In this project the processing and synthesis of collected data was addressed. Results and procedures that address data filtering, travel time sample calculation, calculation of travel time statistics, travel time forecasting are described. Results for the use of collected data to estimate intersection performance are presented, as are the design and requirements for an automated travel time data collection system. The report includes a users' manual.
This project pursued several objectives conducive to the implementation and testing of a Bluetoot... more This project pursued several objectives conducive to the implementation and testing of a Bluetooth (BT) based system to collect travel time data, including the deployment of a BT-based travel time data collection system to perform comprehensive testing on all the components. Two different BT-based travel time data collection systems were installed. The first system, composed of two DCUs, was installed on a corridor located in Salem, OR. Extensive testing was done on this system, including the collection of travel time samples. A second system composed of five DCUs was installed along 99W in the city of Tigard, OR. Very limited data collection was done on 99W due to the lack of network connectivity. Six different antenna types were characterized using the two DCU BT-based travel time data collection system. The result of the antenna characterization tests showed that vertically polarized antennas with gains between 9 and 12 dBi are good candidates to support a BT-based travel time data collection system. Antennas with circular polarization do not seem to improve the performance, despite the lack of control regarding the orientation of BTenabled devices in most applications. Travel time samples were also collected with this system. The results indicate that a trade-off exist between the number of samples obtained and the accuracy of these travel time samples. This trade-off is most likely the result of differences in road coverage areas provided by the different antenna types.
Proceedings of IEEE Systems Man and Cybernetics Conference - SMC
It has been shown that if the uncertainties of a discrete-time dynamic system can be modeled by c... more It has been shown that if the uncertainties of a discrete-time dynamic system can be modeled by cone bounded functions of the states, that such a system can be asymptotically stabilized, depending on the size of the uncertainties, via either deterministic Lyapunov based state or output feedback. Unlike continuous-time dynamic systems, the size of the uncertainties of discrete-time dynamic systems that can be handled can not be arbitrarily large. In this paper, we present an algorithm that enables the designer to construct a Lyapunov function such that the output feedback controller derived from it is capable of handling the largest possible uncertainty, Our approach relies on the construction of a matrix Q that has a structure which facilitates the computation of the maximum uncertainty through the maximization of a judiciously chosen cost function.<<ETX>>