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.
Highlights
The opto-electronic platform can quickly capture and track the moving moving target target on the aircraft, which application in aircraft reconnaissance surveying, searching, rescuing rescuing and assessing which had hada widely a widely application in aircraft reconnaissance surveying, searching, and shells-hitting result
We focus on compensating unknown time-varying delay in the opto-electronic platform tracking servo system and design a new feed-forward forecasting controller based on robust
Simulation based on double closed-loop PI control system indicates that the proposed method is effective for compensating unknown time-varying delay
Summary
The opto-electronic platform can quickly capture and track the moving moving target target on the aircraft, which application in aircraft reconnaissance surveying, searching, rescuing rescuing and assessing which had hada widely a widely application in aircraft reconnaissance surveying, searching, and shells-hitting result. There was a non-negligible miss-distance delay caused by the process of producing image by CCD (Charge Coupled Device), measuring miss-distance by image tracking sensor and transmitting miss-distance data to servo system This miss-distance delay in the opto-electronic platform tracking servo system can be described as unknown, bounded and time-varying. Design of the controller u(t)/U(K) directly under unknown time-varying delay cannot meet the accuracy requirements because tracking accuracy must be mrad level Another efficient approach is compensating time-delay by feed-forward forecasting based on maneuvering target tracking [21–28], such as such as particle filter [23], Kalman filter [24] and H∞. We focus on compensating unknown time-varying delay in the opto-electronic platform tracking servo system and design a new feed-forward forecasting controller based on robust.
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