【作者】 颜杨洋；

【导师】 保宏；

【作者基本信息】 西安电子科技大学 ， 控制理论与控制工程， 2011， 硕士

【摘要】 天线控制系统设计是目前的一个热点问题。人们希望在天线口径增大,频率增高的同时,满足控制系统的指向精度,响应速度以及鲁棒性等要求。本文围绕大型天线系统的控制器设计问题展开。首先针对大型天线系统,利用国内外各种现有的控制方法对其进行分析以及仿真,比较并总结各种控制方法的优劣。其次,针对大型天线系统存在外界扰动的问题,本文比较各种控制方法的鲁棒性。并指出控制精度好的控制系统,其鲁棒性则较差这一问题。指明了控制精度和鲁棒性是相互矛盾的。最后,本文提出了一种滑模反馈控制方法。利用滑模控制器鲁棒性好的优点,以及反馈通道可以削弱噪音扰动的特性,提高控制系统的控制精度以及该系统的鲁棒性。并从理论上对其稳定性进行了证明。并且通过实验以及仿真对该方法的有效性进行了验证。更多还原

【Abstract】 The study of control design strategies for large radio telescope has become a hot topic at present. High frequency large aperture antennas are needed. The requirements of point become more and more accuracy. And the robustness should be good as well.This paper is aiming at the design of controller. Firstly, compare some advantages and disadvantages of different methods. Then made some summarizes of it.Secondly, aiming at the uncertain problem of high frequency large aperture antenna, robustness is compared in this paper. And make the conclusion that the accuracy and the robustness are inconsistent with each other.Finally, sliding mode feedback control is proposed in this paper. It is used to improve controlling accuracy and robustness. Then, the analysis of robust stability is given. The simulation and real experiment results show the effectiveness of this method.更多还原