Research On Environmental Parameters Online Identification And Adaptive Control Method Of Missile

With the confrontation between both sides appear to be more complex and changeful in the future battlefield,the boost-glide missile effectively combines the advantages of traditional ballistic missile and aerodynamic missile,and is becoming the hot spot in the global research with its features of long range,fast,penetration capability and high strike accuracy.To cope with the differences of aerodynamics parameters in fast flight environment,which will decrease the flight stability and affect the efficiency of overall battle,this dissertation has made systematic research on atmosphere data sensing system and online identification of aerodynamics parameter and application on control system,which has research significance to robustness improvement and design of guidance and control system.The algorithm of three-point method based on integrated navigation and other sensing system is investigated,to cope with the problems of high cost and inefficiency in traditional iteration,and then make simulation analysis and verification of algorithm,which increase the efficiency of atmosphere data solving.The optimization of Atmosphere Data Sensing system is investigated.To cope with the insufficient research of the sensors configuration,the optimizations of FADS sensors placement for cone forebode and blunt forebode have been deliberated and verified by mathematical simulation;The errors of FADS system and the method to compensate have been analyzed,which lay the foundation for improvement of accuracy;Furthermore,a scheme of Molecule Optical Air Data System(MOADS)has been presented on the development potential of the atmosphere data sensing system,the construction and fundamentals of MOADS have been analyzed,which make helpful experience for follow-up study.The method of six-DOF aerodynamic parameter modeling and online identification have been coped with.The state equation and observation equation for aerodynamics parameter identification is set up based on dynamical model.And then determine the aerodynamic model through choosing and rejection of the items by stepwise regression.Method of analysis of parameter colinearity based on variance decomposition proportion is proposed,which is verified according to the identification result.Make identification of aerodynamics parameter with Kalman filter method and calculate relative error in the end to apply in the control system.The simulations demonstrate that the aerodynamic models built can well represent the change law of aerodynamic parameter,the method can ensure the convergance and identification precision in aerodynamics parameter identification.The attitude control system based on environmental parameter online identification has been deliberated at last.Make a research about the application of aerodynamics parameter on attitude control system to cope with the demanding accuracy about model parameters.The real time identification of aerodynamics parameter is used in model update adaptation,which eliminates the errors between controller design model and actual model and enhances the robustness of the system.Modelling environmental parameter online indicate first,and research the theory of nonlinear dynamic inversion control,and then analyses the continuous integration of attitude control,on this basis,design the control rule with PID and sliding-mode control and draw a conclusion based on the simulation results,which manifest that identification of environmental parameter improve the control accuracy.Works of the dissertation can support the research of atmosphere data measurement,aerodynamic parameter online identification and adaptive attitude control.