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Design of integral variable structure model following control with load torque estimator for DSP-based servo drive system

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2 Author(s)
Chang, J. ; Dept. of Electr. Eng., Nat. Sun Yat-Sen Univ., Kaohsiung, Taiwan ; Tzuen-Lih Chern

This paper introduces an improved control approach, which incorporates a load torque estimator based on variable-structure technique to the integral variable structure model following control (IVSMFC), for a BLDC drive system. IVSMFC features excellent robustness and performance properties under certain disturbances and parameter variations. However, when carried out on a real mechanism, heavy time-varying load may influence expected performances. In a cam system, for instance, when it is in motion, the load produced by inertia forces deflects the driving motor speed and, as a result, degrades the indexing precision. To improve robustness, a load torque estimator is employed. A DSP-based BLDC servo drive is implemented. A globoal cam indexing system is chosen for experiment to show the effectiveness of the proposed approach

Published in:

Electric Machines and Drives Conference, 2001. IEMDC 2001. IEEE International

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