Research On Design And Performance Evaluation Of Controller For Hypersonic Vehicle

The hypersonic vehicle has been a hot spot in the design and evaluation of the controller because of its multi-channel,strong coupling and non-linear characteristics.This article attempts to explore the field.Firstly,the research background and purpose of and the development of gliding vehicle is introduced,then the current control methods and evaluation methods are analyzed.Based on the Reentry segment of gliding vehicle model,we can get its small deviation linearization model(SDLM).And based on the SDLM,the perturbation model with parameter uncertainty is deduced.The LQR(Linear Quadratic Regulator)and guaranteed cost controller(GCC)are designed based on the SDLM.ITAE(Integral of Time-weighted Absolute Value of the Error)index is easy to understand,but often used to design SISO(Single Input Single Output)system controller,this article uses it as a MIMO(Multi Input Multi Output)system indicators.Based on the ITAE index,the controllers' parameters are optimized by PSO(Particle Swarm Optimization).The results show that this method is practical in MIMO systems.Finally.the two controllers are respectively used in the control law design of the attitude control system,and we can get the good results.Then,the robustness of the controller is analyzed by structural singular value(SSV)method,and the distribution of the poles is used to verify its robustness stability.And finally,the performance robustness of the system is analyzed.The results show that the SSV method is effective as an advanced evaluation method,and it shows that the robustness of the two controllers is good.Finally,this paper uses the method of simulation data to evaluate the performance of the reentry segment.Based on the framework of AHP,the performance evaluation index of attitude control system is established,and its utility function is given according to expert experience.The several kinds of subjective and objective weighting methods and experimental design methods are analyzed,and the appropriate evaluation method is selected.This paper gives the framework of the evaluation process,and finally carries on the simulation based on the evaluation framework.