The Optimal Control Laws Of Space-platform Intercept Base On Small Mobile Thrust And Intercept State Estimation

This paper studied the problems of the space orbit interception optimal control. It used the optimal control theory and maximum principle to research the three-dimensional space to intercept, intercept state estimation, and intercept error control, such as the ability to intercept several areas that under the specific performance indicators.Firstly, the article established the interceptor and the target spacecraft relative motion equation, thereby establishing the optimal control model. It selected the energy, distance, time as performance indicators, analysis the optimal control of the size and direction of the optimal time for the transition, such as the optimal moment shutdown, and conducted associated simulation. The simulation results show that the optimal control of the program is given is correct, can meet actual needs better.The second part of the article is mainly used the Kalman filter to analysis the intercepting state of space orbit. It establishes the observation equations and equation of state base on the relative motion equation, and estimates the intercepting state. Simulation results show that the filter can be estimated well with the state to intercept the actual situation anastomosis, and its allowed error can be achieved within the scope of control.At the same time, the article also Simulation Analysis of the quantitative impact of the error that the control of the direction of the thrust control error, thrust size error, seconds flow error. The simulation results show that the given control law can inhibit the impact of these errors.Finally, the article studies the interceptor's interception. It analyzed the interceptor's ability to intercept under certain conditions and simulated intercept.