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Sensors 2017, 17(5), 1071; doi:10.3390/s17051071

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

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
Received: 23 February 2017 / Revised: 17 April 2017 / Accepted: 3 May 2017 / Published: 9 May 2017
(This article belongs to the Section Physical Sensors)
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Abstract

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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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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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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