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Open AccessArticle

Compensating Unknown Time-Varying Delay in Opto-Electronic Platform Tracking Servo System

by Ruihong Xie 1,2,*, Tao Zhang 2, Jiaquan Li 2 and Ming Dai 2
1
Graduate University of Chinese Academy of Sciences, Beijing 100039, China
2
Key Laboratory of Airborne Optical Imaging and Measurement, Changchun Institute of Optics, Fine Mechanics and Physics Chinese Academy of Sciences, Changchun 130033, China
*
Author to whom correspondence should be addressed.
Academic Editor: Manuela Vieira
Sensors 2017, 17(5), 1071; https://doi.org/10.3390/s17051071
Received: 23 February 2017 / Revised: 17 April 2017 / Accepted: 3 May 2017 / Published: 9 May 2017
(This article belongs to the Section Physical Sensors)
This paper investigates the problem of compensating miss-distance delay in opto-electronic platform tracking servo system. According to the characteristic of LOS (light-of-sight) motion, we setup the Markovian process model and compensate this unknown time-varying delay by feed-forward forecasting controller based on robust H∞ control. Finally, simulation based on double closed-loop PI (Proportion Integration) control system indicates that the proposed method is effective for compensating unknown time-varying delay. Tracking experiments on the opto-electronic platform indicate that RMS (root-mean-square) error is 1.253 mrad when tracking 10° 0.2 Hz signal. View Full-Text
Keywords: miss-distance; unknown time-varying delay; Markovian process; feed-forward forecasting; opto-electronic platform; tracking servo system; robust H∞ controller miss-distance; unknown time-varying delay; Markovian process; feed-forward forecasting; opto-electronic platform; tracking servo system; robust H∞ controller
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Xie, R.; Zhang, T.; Li, J.; Dai, M. Compensating Unknown Time-Varying Delay in Opto-Electronic Platform Tracking Servo System. Sensors 2017, 17, 1071.

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