13 September 2012 Research of active optics force actuator based on voice coil motor
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Abstract
In order to correct the atmospheric disturbance around the main mirror and the error caused by wind, the calibration frequency must reach 10 Hz in the active optics system. Therefore, the force actuator must have good dynamic response and high-precision positioning. A new scheme of force actuator, in which linear voice coil motor is used as the driver and linear grating is used as the displacement sensor, is proposed in this paper. With using the deadbeat control theory, the force actuator could achieve fast response, no steady-state error, small overshoot, rapid recovery, and high-resolution which cannot be deeply improved by the traditional PID control method. Finally, the calibration frequency can reach 20 Hz which has met system design requirements. Simulation and experiment demonstrates that this kind of control method can effectively improve the performance of the force actuator.
© (2012) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Yonggang Gu, Zihao Chen, Yi Jin, Chao Zhai, "Research of active optics force actuator based on voice coil motor", Proc. SPIE 8450, Modern Technologies in Space- and Ground-based Telescopes and Instrumentation II, 84505H (13 September 2012); doi: 10.1117/12.926030; https://doi.org/10.1117/12.926030
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