Optics and Precision Engineering, Volume. 19, Issue 9, 2085(2011)
Vibration compensation of satellite platform based on piezo-electric steering system
A disturbance compensation scheme based on a piezo-electric steering control system was presented,for the vibration of a satellite platform seriously impacted the tracking and pointing accuracy in space optical communication. A mathematical model for the piezo-electric steering system was built. Then,an adaptive controller based on an improved Least Mean Square(LMS) filter was designed, and effect factors on optimal step length choices were analyzed. For the problem of signal phase delay, an adaptive delay filter was designed not only to compensate the phase delay, but also adaptively to adjust the input signal phase to increase its convergence rate without adding the step length. Finally, a verifying experiment was performed.The results show that the remained errors after compensation are μrad magnitude and the compensation factor is over 85%.These results prove that this control scheme is valid and feasible.
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HAN Cheng-shan, LI Xiang-zhi, WEN Ming, ZHAO Qing-lei, JIANG Xiao-nan. Vibration compensation of satellite platform based on piezo-electric steering system[J]. Optics and Precision Engineering, 2011, 19(9): 2085
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Received: Dec. 2, 2010
Accepted: --
Published Online: Oct. 11, 2011
The Author Email: HAN Cheng-shan (xuan_han@yahoo.com.cn)