Research On The Key Technologies Of Guidance And Control For BTT Intercept Missile

This paper mainly works on the problems of modeling, control and guidance for a BTT intercept missile.In part one, this paper builds the mathematic model of aerodynamic force, moment, engine and rudders references to the datum of the missiles in foreign. On the basis of this, the nonlinear mathematic model of BTT intercept missile with 6-DOF is presented, then the model is controled based on layered structure, the system of missile is divided into slow-loop and fast-loop by exploiting the different time scales of the missile dynamics. Dynamic inverse control is designed to verify the feasibility and precision of the model.In part two, the dynamic inverse control needs the exact model and is sensitive with the external interference, so the nonlinear disturbance observer is used to overcome the influence of the internal modeling error and the external disturbance of the system. Besides, for improving the robustness and fastness of the system, a proposed controller based on the global fast terminal sliding-mode is designed, and combining with RBF neural network a new controller is proposed, which are more effective.In part three, the terminal guidance law of the BTT intercept missile is investigated. Firstly, a kinematics model for 3D guidance problems is derived. An argument proportional navigation guidance law is presented on the basis of proportional navigation guidance law. Then the maneuvering acceleration of target is regarded as external disturbance, an adaptive sliding model guidance based on rules is designed. Owing to the approximation ability to nonlinear functions of RBF neural network, the parameters of neural networks nonlinear observer tuned by adaptive method is used to estimate multiplicate disturbance. A new guidance of RBF neural network nonlinear observer combining with sliding-mode control is proposed.In part four, the 3D scene simulation of BTT missile intercepting process based on Creaor/Vega and Visual C++ is studied. The 3D-visualization of BTT intercept missile platform is developed, which can show the process of missile pursuing target vividly.