Title :
LQG/LTR control of an AC induction servo drive
Author :
Tzou, Ying-Yu ; Wu, Hsiang-Jui
Author_Institution :
Power Electron. & Motion Control Lab., Nat. Chiao Tung Univ., Hsinchu, Taiwan
fDate :
3/1/1995 12:00:00 AM
Abstract :
A new design method based on the linear-quadratic-Gaussian with loop-transfer-recovery (LQG/LTR) theory has been developed for the design of high performance AC induction servomotor drives using microcomputer-based digital control. The principle of field orientation is employed to achieve the current decoupling control of an induction motor. An equivalent model representing the dynamics of the decoupled induction motor has been developed. Based on the developed model with specified parameter uncertainties and given performance specifications, a frequency domain loop-gain-shaping method based on the LQG/LTR theory is proposed for the design of the servo loop controller. A microcomputer-based induction servomotor drive has been constructed to verify the proposed control scheme. Simulation and experimental results are given to illustrate the effectiveness of the proposed design method
Keywords :
control system analysis; control system synthesis; digital control; frequency-domain synthesis; induction motor drives; linear quadratic Gaussian control; machine control; machine theory; microcomputer applications; power engineering computing; servomotors; AC induction servomotor drives; LQG/LTR control; current decoupling control; design; digital control; dynamics; equivalent model; field orientation; frequency domain loop gain shaping method; linear quadratic Gaussian/loop transfer recovery control; microcomputer; parameter uncertainties; performance specifications; Angular velocity; Automatic control; Control systems; DC motors; Induction motors; Robust control; Rotors; Servomechanisms; Synchronous motors; Torque;
Journal_Title :
Power Electronics, IEEE Transactions on
