EPE Association: EPE 2005 - Topic 06-1 - LS: Application of control methods to electrical systems

EPE 2005 - Topic 06-1 - LS: Application of control methods to electrical systems
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2005 - Conference > EPE 2005 - Topic 06: APPLICATION OF CONTROL MODELS TO ELECTRICAL SYSTEMS > EPE 2005 - Topic 06-1 - LS: Application of control methods to electrical systems

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   Discrete Optimal Control with Fixed End-Point for an Electrical Servo Drive System
By OSTAFI Florin; BOTAN Corneliu; ONEA Alexandru [View]
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Abstract: The linear quadratic with fixed end-point problem for a servo drive system with a brushless or a d.c. motor is presented. Using some previous results of the authors, a convenient method is indicated; the proposed algorithm allows the simplifying of the optimal control law implementation and the obtaining of reduced energy consumption.

   Fuzzy modeling of disturbance torques/forces in rotational/linear interior permanent magnet synchronous motors
By KABZINSKI Jacek [View]
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Abstract: We propose several artificial intelligence techniques for fuzzy modeling of electromagnetic and disturbance (friction, ripples) torques/ forces in permanent magnet rotational/linear motors. Based on a model taking into account several nonlinear phenomena such as non-sinusoidal flux linkage, saturation effects, cross-magnetization etc we use observer-based parameter identifiers approach to plan identification experiments. We investigate and compare several training algorithms to tune the model parameters and to simplify the model structure. We especially recommend application of bacterial evolutionary algorithm for these purposes. Applications of obtained model in adaptive control are suggested.

   Near Time-Optimal Position Control of an Actuator with PMSM
By VITTEK Jan [View]
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Abstract: The paper presents design and implementation of ‘near-time-optimal’ position control of electrical drive employing permanent magnet synchronous motor. The position control algorithm, which is applied to the motor, is derived from a simple double integrator model. Then principles of vector control, forced dynamics control and time-optimal control are combined to form suitable control strategy, which wasdeveloped as two modifications. The first developed control strategy is model based. Near-time-optimal double integrator model, which works in real time computes ‘near-time-optimal’ response to the demanded position. This computed position then provides the reference input for the drive position control loop. To compensate some delay between generated position in the model and real drive position the precompensator was implemented. The second modification of the control strategy is based on direct computation of the stator current torque component from the known required torque of the machine. Load torque estimate, which is necessary for both control strategies yields linear third order observer.Comparison of these two control strategies based on experimental results is given for an actuator with PMSM. Presented experimental results for model based and direct torque component computation of NTO control direct show possibility to achieve ‘near-time-optimal’ behavior of the drive employing PMSM for both control strategies.

   Two Degree of Freedom Resonant Structure for Robust Current Control and Active Power Filtering
By BAJCINCA Naim; NAUNIN Dietrich [View]
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Abstract: This paper introduces a novel two degree of freedom resonant control structure for current control in a stationary reference frame in one- or three-phase power electronics systems. The main focus is put on the design of the controller for robust tracking of a single or a linear combination of harmonic components, while providing robustness with respect to load parameter variations, disturbance and measurement noise. The method is applied for current control of a single phase active power filter.

EPE 2005 - Topic 06-1 - LS: Application of control methods to electrical systems
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2005 - Conference > EPE 2005 - Topic 06: APPLICATION OF CONTROL MODELS TO ELECTRICAL SYSTEMS > EPE 2005 - Topic 06-1 - LS: Application of control methods to electrical systems
	[return to parent folder]

	Discrete Optimal Control with Fixed End-Point for an Electrical Servo Drive System By OSTAFI Florin; BOTAN Corneliu; ONEA Alexandru	[View] [Download]
Abstract: The linear quadratic with fixed end-point problem for a servo drive system with a brushless or a d.c. motor is presented. Using some previous results of the authors, a convenient method is indicated; the proposed algorithm allows the simplifying of the optimal control law implementation and the obtaining of reduced energy consumption.

	Fuzzy modeling of disturbance torques/forces in rotational/linear interior permanent magnet synchronous motors By KABZINSKI Jacek	[View] [Download]
Abstract: We propose several artificial intelligence techniques for fuzzy modeling of electromagnetic and disturbance (friction, ripples) torques/ forces in permanent magnet rotational/linear motors. Based on a model taking into account several nonlinear phenomena such as non-sinusoidal flux linkage, saturation effects, cross-magnetization etc we use observer-based parameter identifiers approach to plan identification experiments. We investigate and compare several training algorithms to tune the model parameters and to simplify the model structure. We especially recommend application of bacterial evolutionary algorithm for these purposes. Applications of obtained model in adaptive control are suggested.

	Near Time-Optimal Position Control of an Actuator with PMSM By VITTEK Jan	[View] [Download]
Abstract: The paper presents design and implementation of ‘near-time-optimal’ position control of electrical drive employing permanent magnet synchronous motor. The position control algorithm, which is applied to the motor, is derived from a simple double integrator model. Then principles of vector control, forced dynamics control and time-optimal control are combined to form suitable control strategy, which wasdeveloped as two modifications. The first developed control strategy is model based. Near-time-optimal double integrator model, which works in real time computes ‘near-time-optimal’ response to the demanded position. This computed position then provides the reference input for the drive position control loop. To compensate some delay between generated position in the model and real drive position the precompensator was implemented. The second modification of the control strategy is based on direct computation of the stator current torque component from the known required torque of the machine. Load torque estimate, which is necessary for both control strategies yields linear third order observer.Comparison of these two control strategies based on experimental results is given for an actuator with PMSM. Presented experimental results for model based and direct torque component computation of NTO control direct show possibility to achieve ‘near-time-optimal’ behavior of the drive employing PMSM for both control strategies.

	Two Degree of Freedom Resonant Structure for Robust Current Control and Active Power Filtering By BAJCINCA Naim; NAUNIN Dietrich	[View] [Download]
Abstract: This paper introduces a novel two degree of freedom resonant control structure for current control in a stationary reference frame in one- or three-phase power electronics systems. The main focus is put on the design of the controller for robust tracking of a single or a linear combination of harmonic components, while providing robustness with respect to load parameter variations, disturbance and measurement noise. The method is applied for current control of a single phase active power filter.