EPE Association: EPE-PEMC 2000 - Topic 09d: DSP Control Techniques

EPE-PEMC 2000 - Topic 09d: DSP Control Techniques
You are here: EPE Documents > 04 - EPE-PEMC Conference Proceedings > EPE-PEMC 2000 - Conference > EPE-PEMC 2000 - Topic 09: Motion Control > EPE-PEMC 2000 - Topic 09d: DSP Control Techniques

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   A New Real-Time Control Strategy for Induction Motors Based on a Reference Control and RST Predictive Structure
By Maaziz M.K.*, Mendes E.**, Boucher P.* [View]
[Download]

Abstract: A new real-time control strategy for induction motors is introduced. This paper shows that rotor speed and rotor flux magnitude reference tracking of an induction machine can be originally obtained. The proposed control law is based on two points : an open-loop reference control which allows to obtain perfect tracking since outputs are planned and on a closed-loop strategy based on a new RST predictive structure for the stabilization around the desired trajectories. This innovative structure called GPC/VSRC (Generalized Predictive Control with Voltage Single Reference Control) ensures rotor speed and rotor flux tracking despite uncertainties on rotor resistance and load torque variations. Experimental results, including an estimation of the rotor flux norm, are given to illustrate the originality and feasibility of this control law.

   A Very Simple Self-Tuning PID Speed Controller
By Romeral J.L., Aldabas E., Arias A., Bordonau J. [View]
[Download]

Abstract: The authors present a PID Adaptive Speed Controller for AC motor speed regulation with a very low computational algorithm. The controller is based in a novel fuzzy adaptation method that changes the parameters of an standard PID controller, concretely integral constant KI, for adapting it to the plant evolution according to the dynamics of the system. This fuzzy logic adaptive strategy has been readily implemented, with very fast learning features and very good tracking characteristics, ever under serious variations of the system parameters. The developed controller has been also compared with other classical controls, as standard non-adaptive PID control, and experimental results demonstrate the robustness of the suggested algorithm in contending with varying load and torque disturbance.

   Behaviour Model Control of a High Speed Railway Traction System
By Pierquin J., Escané P.*, Bouscayrol A., Pietrzak-David M.*, Hautier J.P., de Fornel B.* [View]
[Download]

Abstract: A Behaviour Model Control (BMC) is proposed to control a high speed railway traction system. Such an application may be strongly disturbed by the non-linear wheel-rail adhesion characteristic. The BMC is used to overcome this problem. Simulations point out the efficiency of this anti-slipping control.

   Damping of the Torsional Servodrive Vibration by Means of the State Variable Feedback
By Kaczmarek T., Muszyñski R. [View]
[Download]

Abstract: The essence of the paper is an approach to the control of electromechanical system with resilience between motor and load. The servo drive, equipped with a PM synchronous motor and current controlled VS inverter, was tested using simulation model. Improving of the damping properties of the system, by means of state controller optimization method, was the goal of investigations. Two control structure were studied: a linear one, with constant parameters, and a nonlinear, with parameters depending on speed error. The optimization method is based, on quality criterion and the Simplex procedure. The simulation results indicate the effectivnes of nonlinear state controller assuring good damping properties of the electromechanical system.

   Induction Machine with Stator Flux Vector Control in dq Co-ordinates
By Monteiro J.*, Marques G.D., Palma J.* [View]
[Download]

Abstract: Stator Flux Vector Control is a recently proposed method for the control of induction machines. This method consists in controlling the dq stator flux linkages in the rotor reference frame. It has the advantage of inherent constant switching frequency. However, this method of control, when implemented in ab co-ordinates, introduces a notable error in torque response in steady state operation specially when low operating frequencies are used. This steady state error is due to the sinusoidal waveforms of the stator flux components in the stator reference frame.

   Nonlinear Control of Induction Motor, Idea and Application
By Abu-Rub H., Krzemiñski Z.*, Guziñski J.* [View]
[Download]

Abstract: In the paper it is discussed the advantages and the superiority of lastly presented nonlinear control of induction machine over the well known vector control methods. It is presented the theory of the method and sate variables identification. Nonlinear control with nonlinear feedback is used to obtain linear fully decoupled system control of induction motor. The obtained system does not depend on the feeding method. Therefore a general control method appropriate to different feeding methods of the induction motor is discussed. The application of the method to sensorless control and real time simulation results are presented.

   Variable Angle PWM Adjustable-Speed Control for Switched Reluctance Motor Drive
By Chen H., Zhang C., Meng X. [View]
[Download]

Abstract: The paper gives a variable angle pulse width modulation (PWM) adjustable-speed control strategy for four-phase 8/6 structure Switched Reluctance motor drive and introduces the developed prototype. Taking a four-phase 8/6 structure prototype for example, the variable angle PWM adjustable-speed control strategy is compared with the fixed angle PWM adjustable-speed control strategy that the turn-on angle of the main switches is fixed at -7.50 and the turn-off angle of the main switches is fixed at 22.50 . It is shown that the four-phase 8/6 structure Switched Reluctance motor drive using the novel PWM control strategy has low peak value of phase current, high efficiency and the fixed switching frequency value of the main switches over the low rotor speed range.

   Vibration Suppression and Disturbance Rejection Control in Semi-Nyquist Frequency Region Based on a Novel Multirate Sampling Control with Initial Value Compens
By Fujimoto H., Hori Y. [View]
[Download]

Abstract: In this paper, novel multirate feedback controllers are proposed for digital control systems, where it is restricted that the speed of the A/D converters are slower than that of the D/A converters. The proposed controllers achieve vibration suppression and disturbance rejection even in the semi-Nyquist frequency region. First, the continuous-time vibration suppression controller is exactly discretized by the multirate sampling control based on the closed-loop characteristics. Second, the multirate repetitive controllers are proposed both by the feedback and feedforward approaches. Moreover, the initial value compensations for ob-server are proposed in order to prevent the overshoot. The proposed controllers are applied to the settling and following modes of hard disk drive, and the advantages of these approaches are demonstrated by simulations.

EPE-PEMC 2000 - Topic 09d: DSP Control Techniques
You are here: EPE Documents > 04 - EPE-PEMC Conference Proceedings > EPE-PEMC 2000 - Conference > EPE-PEMC 2000 - Topic 09: Motion Control > EPE-PEMC 2000 - Topic 09d: DSP Control Techniques
	[return to parent folder]

	A New Real-Time Control Strategy for Induction Motors Based on a Reference Control and RST Predictive Structure By Maaziz M.K., Mendes E., Boucher P.	[View] [Download]
Abstract: A new real-time control strategy for induction motors is introduced. This paper shows that rotor speed and rotor flux magnitude reference tracking of an induction machine can be originally obtained. The proposed control law is based on two points : an open-loop reference control which allows to obtain perfect tracking since outputs are planned and on a closed-loop strategy based on a new RST predictive structure for the stabilization around the desired trajectories. This innovative structure called GPC/VSRC (Generalized Predictive Control with Voltage Single Reference Control) ensures rotor speed and rotor flux tracking despite uncertainties on rotor resistance and load torque variations. Experimental results, including an estimation of the rotor flux norm, are given to illustrate the originality and feasibility of this control law.

	A Very Simple Self-Tuning PID Speed Controller By Romeral J.L., Aldabas E., Arias A., Bordonau J.	[View] [Download]
Abstract: The authors present a PID Adaptive Speed Controller for AC motor speed regulation with a very low computational algorithm. The controller is based in a novel fuzzy adaptation method that changes the parameters of an standard PID controller, concretely integral constant KI, for adapting it to the plant evolution according to the dynamics of the system. This fuzzy logic adaptive strategy has been readily implemented, with very fast learning features and very good tracking characteristics, ever under serious variations of the system parameters. The developed controller has been also compared with other classical controls, as standard non-adaptive PID control, and experimental results demonstrate the robustness of the suggested algorithm in contending with varying load and torque disturbance.

	Behaviour Model Control of a High Speed Railway Traction System By Pierquin J., Escané P., Bouscayrol A., Pietrzak-David M., Hautier J.P., de Fornel B.*	[View] [Download]
Abstract: A Behaviour Model Control (BMC) is proposed to control a high speed railway traction system. Such an application may be strongly disturbed by the non-linear wheel-rail adhesion characteristic. The BMC is used to overcome this problem. Simulations point out the efficiency of this anti-slipping control.

	Damping of the Torsional Servodrive Vibration by Means of the State Variable Feedback By Kaczmarek T., Muszyñski R.	[View] [Download]
Abstract: The essence of the paper is an approach to the control of electromechanical system with resilience between motor and load. The servo drive, equipped with a PM synchronous motor and current controlled VS inverter, was tested using simulation model. Improving of the damping properties of the system, by means of state controller optimization method, was the goal of investigations. Two control structure were studied: a linear one, with constant parameters, and a nonlinear, with parameters depending on speed error. The optimization method is based, on quality criterion and the Simplex procedure. The simulation results indicate the effectivnes of nonlinear state controller assuring good damping properties of the electromechanical system.

	Induction Machine with Stator Flux Vector Control in dq Co-ordinates By Monteiro J., Marques G.D., Palma J.	[View] [Download]
Abstract: Stator Flux Vector Control is a recently proposed method for the control of induction machines. This method consists in controlling the dq stator flux linkages in the rotor reference frame. It has the advantage of inherent constant switching frequency. However, this method of control, when implemented in ab co-ordinates, introduces a notable error in torque response in steady state operation specially when low operating frequencies are used. This steady state error is due to the sinusoidal waveforms of the stator flux components in the stator reference frame.

	Nonlinear Control of Induction Motor, Idea and Application By Abu-Rub H., Krzemiñski Z., Guziñski J.	[View] [Download]
Abstract: In the paper it is discussed the advantages and the superiority of lastly presented nonlinear control of induction machine over the well known vector control methods. It is presented the theory of the method and sate variables identification. Nonlinear control with nonlinear feedback is used to obtain linear fully decoupled system control of induction motor. The obtained system does not depend on the feeding method. Therefore a general control method appropriate to different feeding methods of the induction motor is discussed. The application of the method to sensorless control and real time simulation results are presented.

	Variable Angle PWM Adjustable-Speed Control for Switched Reluctance Motor Drive By Chen H., Zhang C., Meng X.	[View] [Download]
Abstract: The paper gives a variable angle pulse width modulation (PWM) adjustable-speed control strategy for four-phase 8/6 structure Switched Reluctance motor drive and introduces the developed prototype. Taking a four-phase 8/6 structure prototype for example, the variable angle PWM adjustable-speed control strategy is compared with the fixed angle PWM adjustable-speed control strategy that the turn-on angle of the main switches is fixed at -7.50 and the turn-off angle of the main switches is fixed at 22.50 . It is shown that the four-phase 8/6 structure Switched Reluctance motor drive using the novel PWM control strategy has low peak value of phase current, high efficiency and the fixed switching frequency value of the main switches over the low rotor speed range.

	Vibration Suppression and Disturbance Rejection Control in Semi-Nyquist Frequency Region Based on a Novel Multirate Sampling Control with Initial Value Compens By Fujimoto H., Hori Y.	[View] [Download]
Abstract: In this paper, novel multirate feedback controllers are proposed for digital control systems, where it is restricted that the speed of the A/D converters are slower than that of the D/A converters. The proposed controllers achieve vibration suppression and disturbance rejection even in the semi-Nyquist frequency region. First, the continuous-time vibration suppression controller is exactly discretized by the multirate sampling control based on the closed-loop characteristics. Second, the multirate repetitive controllers are proposed both by the feedback and feedforward approaches. Moreover, the initial value compensations for ob-server are proposed in order to prevent the overshoot. The proposed controllers are applied to the settling and following modes of hard disk drive, and the advantages of these approaches are demonstrated by simulations.