A Novel Two-Degrees-of-Freedom Voice Coil Motor and its PID Controllers for Linear and Rotary Motions

Xi Qing Jia; Shou Bin Liu

doi:10.4028/www.scientific.net/AMM.303-306.1635

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 303-306A Novel Two-Degrees-of-Freedom Voice Coil Motor...

A Novel Two-Degrees-of-Freedom Voice Coil Motor and its PID Controllers for Linear and Rotary Motions

Abstract:

A two-degrees-of-freedom voice coil motor and its control system are proposed for linear and rotary motions with high speed. This VCM consists of two individual motion parts driven by two separated DSP embedded controllers. For servo control of the VCM, an improved PID control algorithm is adopted. The performance of the control algorithm is evaluated under actual environment. When the targets of position and angle are set at 5mm and 15°, the time response shows 48ms and 70.4ms settling time with 5μm and 3’ steady state error without overshoot. Settling time is reduced to 36% as compared to that of original PID controller.