星载天线伺服系统的模糊-PI控制应用研究

Application of Fuzzy-PI Control in Antenna Servo System

针对星载天线伺服控制系统中传统PI控制表现出的对系统参数变化敏感、适应能力差的缺点,文中设计了自适应模糊-PI(Fuzzy-PI)控制器。通过模糊控制对PI参数进行在线自动整定,将模糊控制引入到永磁同步电机的矢量控制中去,由于模糊控制器对系统的数学模型并没有较高要求,因此有较强的鲁棒性。文中控制系统分别采用PI控制和Fuzzy-PI控制策略,然后分别进行位置跟踪仿真,并对程控跟踪过程中转动惯量增大及负载加干扰时的控制系统进行离线仿真,仿真结果表明,Fuzzy-PI控制器能融合两者优点,具有系统响应快,抗负载干扰能力强,鲁棒性好的优点,表明应用该策略可以有效的改善星载天线伺服系统的性能。

For the conventional PI control′s sensitive to changes of system parameters and the shortcoming of poor adaptability in the satellite antenna servo control system, in this paper, adopted fuzzy-PI control meth-od.This method can realize the online self-tuning of PI parameters, in this way, fuzzy control can be intro-duced into the vector control of PMSM, because the fuzzy controller are not high demand for the mathemati-cal model of the system, there is a strong robustness.PI control and fuzzy-PI control strategy were both used in control system, and then do position tracking simulation and simulate when increased the rotational inertia and load with interference in the tracking process of program control respectively, compared the waveforms of two control ways, show that, the fuzzy-PI controller can integrate the advantages of both systems, with the advantages of fast response, well anti-interference ability and robustness, indicate that the application of the policy can effectively improve antenna servo system′s performance.