volume | PIER Journals

Abstract

To mitigate unbalanced vibration caused by rotor eccentricity in composite cage rotor bearingless induction motors (CCR-BIM), this paper proposes an enhanced hybrid control strategy integrating a rotor-speed adaptive second-order generalized integrator (RA-SOGI) harmonic observer with dual-channel compensation. A variable step-size adaptive LMS (VSS-ALMS) algorithm is introduced to optimize RA-SOGI, enabling real-time extraction of fundamental vibration components with reduced computational burden and improved convergence. In the feedback channel, an adaptive PID controller with variable learning rates and residual feedforward correction is designed, achieving a superior balance between transient response and steady-state precision. Lyapunov-based analysis establishes the global asymptotic stability of the proposed scheme under practical step-size constraints. Experimental validations demonstrate that the proposed method significantly outperforms conventional PID and feedforward control, achieving faster convergence, higher vibration attenuation, and enhanced trajectory stability in high-speed CCR-BIM operation.

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Dr. Chengling Lu

Dr. Ziqing Liu

Dr. Wenxin Fang

Dr. Qifeng Ding

Dr. Yanxue Zhang