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LQG/LTR control of an AC induction servo drive

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2 Author(s)
Ying-Yu Tzou ; Power Electron. & Motion Control Lab., Nat. Chiao Tung Univ., Hsinchu, Taiwan ; Hsiang-Jui Wu

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

Published in:

Power Electronics, IEEE Transactions on  (Volume:10 ,  Issue: 2 )