电视导引头LQG控制器设计及仿真

A Design and Simulation of LQG Controller on TV Seeker

以现有的TV导引头系统模型为基础,研究了随机干扰作用下的导引头系统的最优控制问题。分析了LQG控制器设计中的关键参数Q、R的选择对控制的影响。通过时域和频域分析,考察了控制系统的稳定性和响应特性,从而设计了LQG控制器。将增加LQG控制器前、后的系统进行仿真比较,结果表明:所设计的LQG控制器在导引头系统稳定性、调节时间和抗干扰性方面都取得了更好的结果。

Based on the existing TV seeker model,the optimal control problem ot TV seeker system which was dis- turbed by the random number was researched in the dissertation.The influence of the parameters.Q and R,on the con- troller design was analyzed.On time-domain and frequency-domain aspects,steady and transient performances of the control system were considered to designing the LQG controller.The control results were presented in simulations. Compared with the former system,the simulation results indicated that the controlled TV seeker system might improve the transient performance,steady and disturbance rejection.