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Sensors 2016, 16(7), 968; doi:10.3390/s16070968

Combining Charge Couple Devices and Rate Sensors for the Feedforward Control System of a Charge Coupled Device Tracking Loop

1,2,* , 1,2,3
,
1,2
and
1,2
1
Institute of Optics and Electronics, Chinese Academy of Science, Chengdu 610209, China
2
Key Laboratory of Optical Engineering, Chinese Academy of Sciences, Chengdu 610209, China
3
University of Chinese Academy of Sciences, Beijing 100039, China
*
Author to whom correspondence should be addressed.
Academic Editor: Vittorio M. N. Passaro
Received: 23 April 2016 / Revised: 21 June 2016 / Accepted: 21 June 2016 / Published: 25 June 2016
(This article belongs to the Section Physical Sensors)
View Full-Text   |   Download PDF [2304 KB, uploaded 25 June 2016]   |  

Abstract

A rate feed forward control-based sensor fusion is proposed to improve the closed-loop performance for a charge couple device (CCD) tracking loop. The target trajectory is recovered by combining line of sight (LOS) errors from the CCD and the angular rate from a fiber-optic gyroscope (FOG). A Kalman filter based on the Singer acceleration model utilizes the reconstructive target trajectory to estimate the target velocity. Different from classical feed forward control, additive feedback loops are inevitably added to the original control loops due to the fact some closed-loop information is used. The transfer function of the Kalman filter in the frequency domain is built for analyzing the closed loop stability. The bandwidth of the Kalman filter is the major factor affecting the control stability and close-loop performance. Both simulations and experiments are provided to demonstrate the benefits of the proposed algorithm. View Full-Text
Keywords: sensor fusion; charge couple device; feedforward control; time delay; light of sight error, FOG sensor fusion; charge couple device; feedforward control; time delay; light of sight error, FOG
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Tang, T.; Tian, J.; Zhong, D.; Fu, C. Combining Charge Couple Devices and Rate Sensors for the Feedforward Control System of a Charge Coupled Device Tracking Loop. Sensors 2016, 16, 968.

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