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Feedback Control Design for VCM

Der-Cherng Liaw, Li-Feng Tsai, and Jun-Wei Chen
Inst. of Electrical and Control Engr, National Chiao Tung University, Hsinchu, Taiwan
Abstract—A design of PD feedback control law for a class of the second order system to satisfy the desired performance requirements is presented. It is achieved by using root-locus approach. The desired specifications of the step-input system response are first transformed into a required region for the poles of the PD control closed-loop system. Ranges of the corresponding PD control gains are then derived to guarantee the poles of the closed-loop system lie within the targeted region. Besides, the proposed control law is also applied to the feedback control of Voice Coil Motor (VCM) to support the function of the so-called “Optical Image Stabilization (OIS).” Numerical results by using a referenced VCM model have demonstrated the success of the proposed design. 

Index Terms—PD control, VCM, Linear system

Cite: Der-Cherng Liaw, Li-Feng Tsai, and Jun-Wei Chen, "Feedback Control Design for VCM," International Journal of Electronics and Electrical Engineering, Vol. 9, No. 1, pp. 16-20, March 2021. doi: 10.18178/ijeee.9.1.16-20

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