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Annual IEEE Conference on Power Electronics Specialists (PESC)

作者： Jin-Yi Jyang Ying-Yu Tzou Power Electronics & Mechatronics Control Laboratory Department of Electrical and Control Engineering National Chiao Tung University Taiwan

ISBN: (纸本)0780344898

This paper presents the design and implementation of a vector control IC using complex programmable logic device (CPLD). A vector oriented control structure using integer arithmetic has been developed for the voltage or current regulation of 3-phase PWM inverters. This vector control IC can be used for the voltage or current control of a 3-phase PWM inverter using a vector command with specified amplitude, frequency, and phase. It has four operation modes: voltage or current control in either stationary or synchronous reference frame. This vector control IC is designed as a co-processor for a general-purpose microcontroller used for AC motor control and 3-phase power supplies. This vector control IC is realized with a 10-bit data bus and employs about 40 thousand logic gates of a CPLD (FLEX 10K 100) from Altera Co. The sampling rate can be programmed up to 50 kHz. Simulation and experimental results are given to illustrate the performance of the designed vector control IC.

关键词： Pulse width modulation Voltage control Machine vector control Current control Pulse width modulation inverters Programmable logic devices Arithmetic Frequency Coprocessors Microcontrollers

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Analysis and design on the reduction of DC-link electrolytic capacitor for AC/DC/AC converter applied to AC motor drives

Analysis and design on the reduction of DC-link electrolytic...

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Annual IEEE Conference on Power Electronics Specialists (PESC)

作者： Wen-Song Chien Ying-Yu Tzou Power Electronics and Mechatronics Control Laboratory Department of Electrical and Control Engineering National Chiao Tung University Taiwan

ISBN: (纸本)0780344898

This paper presents the design of a three-phase quasi-direct AC/DC/AC converter with minimum energy storage in the DC-link capacitor. The proposed digital control scheme can achieve unity power factor, lower current distortion on the utility side, and fast response to DC-link voltage regulation. A power balancing control scheme is used to minimize the required DC-link capacitor. The design procedure of the proposed method, accompanied with given simulation results, has been described.

关键词： Capacitors Analog-digital conversion Reactive power Voltage Current control Rectifiers Circuits AC-DC power converters Power system harmonics Energy storage

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Multirate Implementation of a Quasi-Sliding Mode control

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IFAC Proceedings Volumes 1998年第18期31卷 245-250页

作者： F. Naranjo-Pérez P. Albertos Program of Mechatronics Engineering C.U.A.O Cali Colombia. Department of Systems Engineering and Control U.P.V. Valencia. Spain.

In this paper a discrete time sliding-mode type controller is proposed and it is implemented by using a multirate output sampling scheme. This strategy avoids the use of state observers, the uncertainty in the model parameters and disturbances being counteracted by the robustness of the sliding mode control structure. This controller does not involve switching, and it is applied to control stable and unstable systems. Also by simulations, the controller has shown to be robust against changes in the plant model parameters. Dans ce papier, les techniques de échantillonage à frequence multiple sont apliquées à l'implementation de la commande awe structure variable. Cette stratégie élimine la necessit des observateurs d'êtat et permet quelque niwau d'incertitude dans les paramètres du model autant que des perturbations, ce qui est une caractéristique de la commande au mode glissant. La commande qu'on propose n'a pas besoin du switching, et il est appropié pour la commande des processus estables et inestables. Moyenant des simulation, on a verifié la fiabilité de la commande sous la presence des variations dans les paramètres du processus.

关键词： Sliding mode multirate discrete time control robustness

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A three-phase PWM AC-DC converter with low switching frequency and high power factor using DSP-based repetitive control technique

A three-phase PWM AC-DC converter with low switching frequen...

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Annual IEEE Conference on Power Electronics Specialists (PESC)

作者： Shih-Liang Jung Hsiang-Sung Huang Ying-Yu Tzou Power Electronics and Mechatronics Control Lab Department of Electrical and Control Engineering National Chiao Tung University Taiwan National Chiao Tung University Hsinchu TW

ISBN: (纸本)0780344898

This paper presents a novel digital control scheme for PWM AC-DC converters with low switching frequency used in high-power applications. The proposed scheme incorporates an inner current loop with an outer voltage loop to improve input power factor and regulate the output DC-link voltage. The inner current loop consists of a predictive controller and a repetitive controller. The outer voltage loop is composed of a digital PI controller and a load current compensator. A PWM AC-DC converter employing DSP control has been constructed to verify the proposed control scheme. A nearly unit input power factor can be achieved even with a low switching frequency. Experimental results confirm the feasibility and features of the proposed repetitive control scheme for unit power factor regulation.

关键词： Pulse width modulation Pulse width modulation converters AC-DC power converters Switching frequency Reactive power Digital control control theory Voltage control Power system harmonics Rectifiers

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Two Sensor Based Obstacle Avoidance for Autonomous Vehicles

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IFAC Proceedings Volumes 1998年第3期31卷 105-110页

作者： M.R. Hitchings A. Engwirda M. Kajitani Lj.B. Vlacic Intelligent Control Systems Laboratory School of Microelectronic Engineering Griffith University Nathan Australia 4111 Laboratory of Mechatronics University of Electro-Communications Chofu Tokyo 182 Japan

Individual sensor types have their limitations and advantages in certain environments. The focus of this paper is to detail with an application of two different sensor types on the same autonomous vehicle. Each sensor complements the other, allowing more robust obstacle avoidance algorithms to be implemented. The particular sensor types used in combination in this application are: (i) infrared diodes and phototransistor receivers; and (ii) ultrasonic transceivers.

关键词： Autonomous Vehicles Obstacle Avoidance Ultrasonic Sensors Infrared Sensors Autonomous Mobile Robots

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Comparison of soft-computing and conventional methodologies in control of servo systems

Comparison of soft-computing and conventional methodologies ...

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Annual Conference of Industrial Electronics Society

作者： M.O. Efe A.B. Koku O. Kaynak Electrical and Electronics Engineering Boğaziçi University Bebek Istanbul Turkey Systems and Control Engineering Boğaziçi University Bebek Istanbul Turkey UNESCO Chair on Mechatronics Boğaziçi University Bebek Istanbul Turkey

In this study, the performance of soft-computing methodologies and conventional controllers are compared for the control of a servo system. A number of approaches in both domains are simulated and their performances are assessed in terms of several performance measures. It is seen that the use of soft computing methodologies result in some desirable characteristics.

关键词： control systems Servomechanisms Fuzzy logic Servomotors Design methodology control nonlinearities Uncertainty Neurons Computational modeling Performance evaluation

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Auto-tuning control of self-commissioning electric drives

Auto-tuning control of self-commissioning electric drives

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International Conference on Industrial Electronics, control and Instrumentation

作者： Ying-Yu Tzou Yuh-Farn Lin Power Electronics and Mechatronics Control Laboratory Department of Electrical and Control Engineering National Chiao Tung University Taiwan

ISBN: (纸本)0780339320

This paper proposed a new auto-tuning self-commissioning (ATSC) control scheme for the positioning control of a DC drive for general-purpose servo applications. The ATSC controller consists of three major parts: a basic servo controller (BSC), an auto-tuning controller (ATC), and a self-commissioning controller (SCC). The proposed ATC is a generalized two-degree-of-freedom auto-tuning controller, it can be used to tune any two parameters of a controller without knowing its detailed control algorithm. The proposed ATSC control scheme has been applied to a DC drive for verification. Simulation and experimental studies of the ATSC DC drive have also been given.

关键词： Servomechanisms Automatic control Servomotors Velocity control control systems Friction Digital signal processing Universal motors Electric variables control Power electronics

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An adaptive current control scheme for high-performance AC drives

An adaptive current control scheme for high-performance AC d...

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International Conference on Industrial Electronics, control and Instrumentation

作者： Ming-Fa Tsai Ying-Yu Tzou Power Electronics & Mechatronics Control Laboratory Department of Electrical and Control Engineering National Chiao Tung University Taiwan

ISBN: (纸本)0780339320

In this paper, a self-tuning adaptive current controller for high-performance AC drives is presented. The adaptive current controller, which operates in the stationary two-axis frame to provide the persistently exciting condition for parameter estimation convergence, consists of a one-step-ahead predictive controller and a model estimator. The predictive controller's parameters are adjusted adaptively on line in terms of estimated model parameters. Estimating the model parameters entails a first-order four-dimensional least-squares estimator with exponential data weighting to detect the variations of the motor parameters and the back EMF. The proposed adaptive control scheme is implemented in parallel by IMS T800-20 transputers. Simulation results show the effectiveness of the proposed adaptive current control scheme.

关键词： Programmable control Adaptive control Current control Hysteresis motors Induction motors Parameter estimation Servomotors Predictive models Steady-state Voltage control

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Robust adaptive control for robot manipulators

Robust adaptive control for robot manipulators

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IEEE/ASME (AIM) International Conference on Advanced Intelligent mechatronics

作者： B.W. Bekit L.D. Seneviratne J.F. Whidborne Mechatronics & Control Research Group Department of Mechanical Engineering King''s College London UK

Summary form only given. In this work, a robust adaptive control law for robot manipulators based on Popov hyperstability theory and a PI adaptation law is derived. The novelty of the results lies in the fact that the control offers ample flexibility in its adjustable parameters. A simulation example is given to illustrate the performance of the robust adaptive controller and the choice of control gains that yields best control performance.

关键词： Robust control Adaptive control Robots Manipulators mechatronics Mechanical engineering Educational institutions Programmable control Performance gain

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A simple adaptive scheme for indirect field orientation of an induction motor

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EUROPEAN TRANSACTIONS ON ELECTRICAL POWER 1997年第4期7卷 243-249页

作者： Branco, PJC [?]Paulo Jose da Costa Branco (1965) received the B.Sc. and M.Sc. degrees in Electrical Engineering from the Universidade Federal do Rio de Janeiro (UFRJ) Rio de Janeiro/Bnsil in 1988 and 1991 respectively. Since 1992 he has been an Assistant at the Department of Electrical and Computing Engineering Section of Electrical Machines and Power Electronics in the Instituto Superior Tecnico (I.S.T.). He is currently working toward the Ph.D. degree in Electrical Engineering in an application of fuzzy learning theory in the design of “intelligent” electromechanica1 systems. His majorfieldsof interest are Control of Electrical Drives mainly their rncdellization and control using fuzzy logic and neural networks energy conservation and non-linear dynamic systems. In April I992 he joined at Centro de Automictica of Universidade Tecnica de Lisboa (CAUTL) as a researchassistant and in 1993 joined to the Mechatronics Laboratory in the same university. (Instituto Superior TCcnico (I.S.T.) Department of Electrical and Computing Engineering. Section of Electrical Machines and Power Electronics Lisboflortugal Phone: +35 I 1/8417432 Fax: +3511/848 29 87 E-mail: pbranco@alfa.ist.utl.pt)

A self-adaptive scheme is described for automatically tracking the temperature and saturation-dependent rotor time constant T-r in indirect vector control. This method is based on a monitoring signal injected into the process. A cross-correlation function between the monitoring signal and the speed error indicates the T-r changes in direction (increase or decrease) and magnitude. The proposed identification algorithm presents unique characteristics: it does not use current or voltage sensors;it is not motor-parameter dependent;the amplitude of the monitoring signal can be reduced but with an increase on the speed-error sensibility to control interference in drive's performance and it works either on steady-and dynamic transient-state. it will need some load to operate but this condition is satisfied in all practical cases. Tests were conducted with a 1.2 kW four-quadrant AC drive. The adaptive indirect vector-control was implemented in a microcomputer with the motor supplied by a voltage-source inverter with current control using IGBT Experimental and simulated results using this adaptive digital scheme for different loads and values of model T-r(representing a detuned operation) are presented showing good performances.

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