Research On Active Control Technology And Virtual Reality Simulation

Active Control method is a new idea that is used to design the control system of modern aircraft. This paper focuses on two techniques of the Active Control: direct force control and active flutter suppression.The main jobs of the paper are given as follows:1. According to the requirements and the characteristics of the direct force control, the multi-variable system needs to be decoupled. The decoupling of the multi-variable system is the most important factor of direct force control. After researching the decoupling methods, two different decoupling methods: dynamic inversion and dynamic asymptotic decoupling are selected in this paper. Because the dynamic inversion method needs exactitude mathematics mode, the PI method is used to combine with the dynamic inversion theory, which overcomes the flaw of the dynamic inversion theory and enhances the robustness of the system.2. The direct force theory and the way to design the direct force control system are discussed. Three different lateral modes are introduced later. Then the two different decoupling methods are applied to design the lateral control systems of the aircraft. Finally the control effects of the control systems which are designed by two different methods are compared and analyzed.3. The causes of the flutter and the methods to solve the flutter are researched in the paper. Because of the special requirement of the system, the optimal implicit model-following method with frequency-shaped weight method is used to design the aircraft flutter suppression control system. The simulation results show that, compared to the Optimal Implicit Model-Following ,the flutter suppression control law designed by the optimal implicit mode-following method with frequency-shaped weight not only satisfies robust and high frequency characteristics ,but also meets the ability to efficiently suppress the flutter.