单探测器复合轴伺服系统解耦技术的研究与实现

本文分析了单探测型复合轴系统探测器大视场与高帧频之间的矛盾以及主轴与子轴单元控制输入耦合的问题。采用智能相机控制技术,在线调整CCD探测器的工作参数,实现了探测器在捕获/粗跟踪阶段大视场与精跟踪阶段高探测帧频状态之间的切换;将PZT位置输出与脱靶量进行位置信息的合成并将该信息作为主轴控制输入以保证子轴正常工作。并对系统控制方法进行了仿真,提出根据跟踪精度作为判断系统是否解耦的方法。实验结果表明该方法消除了系统的耦合,取得了较好的控制效果。

Decoupling Research and Implementation of Compound-axis Servo System Using a CCD Detector

The contradiction between large Field of View (FOV)and high frame frequency of detector and the input coupling problems between coarse tracking and fine tracking sub-unit were analyzed in compound-axis servo system using a CCD detector. Smart controller was developed to change the parameters of CCD detector online and the status of CCD detector were changed between large FOV during coarse tracking phase and high frame frequency during fine tracking phase. The output information of PZT driver and miss distance given by CCD detector and image processing unit were synthesized as the control input of the coarse axis sub-unit. What’s more， the control method was simulated，at the same time，a method was presented to estimate the system whether decoupled or not according to the tracking accuracy. The experiment data show that the control methods adopted eliminate the coupling problems of the system and get a good result.