Research Of Reentry-glide Near Space Vehicle Flight Attitude Control System

Reentry-glide Near Space Vehicle is a hypersonic reentry glider maneuverable delivery vehicles. The hypersonic glider vehicle rely on the high lift-to-drag ratio aerodynamic characterics and aerodynamic lift to complete a long-range non-ballistic maneuvers. Therefore, RgNSV has very important martial and civil values. In this dissertation, we develop a Reentry attitude flight control system to meet the strong-stabilization, excellent robust performance,high-precision control of RgNSV.The main contents and results are as follows:In the first part, a simulation model of an RgNSV re-entry mode is presented based on the contributions of our Laboratory.We develop a flight control system which is included two kinds of actuators, the Reaction control system(RCS) and the control surface deflections, to satisfy different control tasks in the flight and Improve the control precision and dynamic performance of the vehicle. Open-loop dynamics characteristics demonstrate that this model is complex-nonlinear, coupling, fast time-varying, so it is able to be used in the following research works. Therefore, for this type of aircraft, we need to develop a advanced Reentry attitude flight control system to meet the strong-stabilization, excellent robust performance,high-precision control of RgNSV.In the second part, a control systems of RgNSV based on the fast terminal sliding mode control is designed. This method is not only able to achieve stable tracking of aircraft, but also has a good dynamic performance and a certain robustness. We take advantage of this control method acting on the controlled object under varying interference to obtain simulation results and validity of this method is verified through the results of simulation experiments.In the third part, two control methods are proposed for disturbed multiple Inputs and multiple outputs uncertain nonlinear systems of RgNSV.1. Optimal fuzzy method for multi-model switched control based on T-S model is proposed.2. Robust adaptive sliding control method based on SVM disturbance observer is proposed. Two control methods of the study are respectively applied to RgNSV and design flight attitude control system. The simulation results show that two control methods has a good dynamic performance and robusticity.