高空大气压力模拟系统自适应鲁棒控制

Adaptive robust control for high altitude atmosphere simulator system

针对高空大气压力模拟系统对伺服装置泄漏敏感且充放气非对称性强的特点,提出采用一种简单、便于工程应用的伺服装置泄漏模型,并基于自适应鲁棒控制原理设计了控制器.自适应鲁棒控制器通过泄漏系数在线辨识减小参数不确定性对控制精度的影响,利用非连续参数映射的方法保证预估参数在一定范围,并基于李雅普诺夫稳定性理论证明了控制系统的渐进稳定性.实验结果表明:所设计的控制器可以获得不同压力点的泄漏系数并消除充放气非对称性的影响,提高系统控制精度和响应速度.

A simple and practical leakage model of the servo device w as presented ,and an adaptive ro‐bust controller was designed for high altitude atmosphere simulator ,which was sensitive to the leak‐age of the servo device and asymmetry between the charging and discharging process .The precision could be improved with the online update of the leakage coefficient ,and the leakage coefficient could be limited in a certain range with the projection mapping .At last ,the system stability was proved by Lyapunov principle .Experiment results show that the proposed controller is effective in dealing with the asymmetry of the system ,and the precision and response speed can be improved .