Research On High-performance Control Method Of High-pressure And High-power Hydraulic Servo-driven Air Valve

In this dissertation,the related research is based on the National Natural Science Foundation of China and the 135 Pre-research Project of the Rocket Army.The study of high performance nonlinear control method for high voltage and high-power electro-hydraulic servo system is aimed to the high precision position tracking of a hydraulic servo driven valve for the missile external force launcher.The key control problem for this equipment was studied in this article,which is mainly from the following four aspects:1.Designing the hydraulic circuit in the control subsystem based on the overall scheme requirements of high-pressure aerodynamic ejection device.According to the relevant test standards,high-pressure and high-power emission control need to be achieved.Therefore,a nonlinear mathematical model of high-voltage high-power launch pad should be established by considering the uncertainty of parameters and uncertain nonlinearity2.The full state feedback and nonlinear backstepping compensation control strategy is based on dual-extended-state-observer.This control strategy can solve various modeling uncertainties and perturbations of the missile launcher's driving valve,in which two extended observers are designed to estimate the systematic state and disturbances and the robust controller is used for backstepping compensation to reduce the impact of system uncertainty on the controller performance.3.The system parameters uncertainty and the uncertain nonlinearity will be considered by a novel control strategy combining the adaptive robust control method and the extended state observer design,which can observe the system matching and the non-matching uncertain nonlinear by designing adaptive extend state observer and use the parameter adaptive method to deal with the uncertain parameters of the system.the burden of the observer will be greatly reduced and the system control performance will be further enhanced.4.Simulation and prototype based on the related problem of control will be carried by taking MATLAB/AMESim as the simulation environment,the simulation is based on the hydraulic control system for driving valve of the missile launcher.Meanwhile,the effectiveness of the control strategy is verified by the analysis of prototype test.