High precision position control of voice coil motor based on single neuron PID

Liyi Li; Qiming Chen; Guangjun Tan; He Zhu

doi:10.1117/12.2015009

31 January 2013 High precision position control of voice coil motor based on single neuron PID

Liyi Li, Qiming Chen, Guangjun Tan, He Zhu

Proceedings Volume 8759, Eighth International Symposium on Precision Engineering Measurement and Instrumentation; 87590S (2013) https://doi.org/10.1117/12.2015009
Event: International Symposium on Precision Engineering Measurement and Instrumentation 2012, 2012, Chengdu, China

Abstract

Voice coil motor(VCM) is widely used in high-speed and high-precision positioning control system in recent years. However, there are system uncertainty, nonlinear, modeling error, and external disturbances in the high-precision positioning control system, traditional PID control method is difficult to achieve precise positioning control. In this paper, a new position control strategy with a single neuron controller which has the capability of self-studying and self-adapting composed with PID controller is put forward, and the feedforward compensator is added to improve the dynamic response of the system in the position loop. Moreover, the disturbance observer is designed to suppress model parameter uncertainty and external disturbance signal in the current loop. In addition, the problem of high precision position control of VCM under the influence of significant disturbances is addressed, which including the gas-lubricated damping, the spring, the back EMF and ripple forces, on the basis, the mathematical model of VCM is established accurately. The simulation results show that this kind of controller can improve the dynamic characteristic and strengthen the robustness of the system, and the current loop with disturbance observer can also restrain disturbance and high frequency.

Citation Download Citation

Liyi Li, Qiming Chen, Guangjun Tan, and He Zhu "High precision position control of voice coil motor based on single neuron PID", Proc. SPIE 8759, Eighth International Symposium on Precision Engineering Measurement and Instrumentation, 87590S (31 January 2013); https://doi.org/10.1117/12.2015009

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