Small Smart Bomb Btt Controller Design And Trajectory Simulation

As a symmetrical structure Guided Bomb Unit(GBU), The Small Smart Bomb (SSB) is developed very quickly in recent years. Because of simple frame, used conveniency, long range, highly shoot precision, and cheap, It is aroused persistent concern. SSB used to adopt Bank-To-Turn(BTT) control method in process of fling, which can make the largest lifting surface turning quickly to the ideal motor direction, and produce the reauired maneuvering acceleration. This method can obviously improve the efficiency dynamics of the SSB.This thesis, aimmed at application of engineering practical, studies flight control system of a certain SSB, which mathematical model is regarded as Multi-Input Multi-Output(MIMO) system, applies Robust Control theory, adopts Linear Matrix Inequality(LMI) mixed weight sensitivity H∞control method, designs the BTT controller which can make the SSB flying at large airspace, and then validates the control system performance by the whole trajectory simulation of the SSB.The main research works are described as follows:1.Based on the correctly simplifying and assuming, the thesis establishes the SSB's kinematical model and dynamical model, and chooseing the state varibales, that can be messured easily in engineering practical, deduces all states measurable BTT mathematical model include of Pitch-Yaw chunnel and Roll chunnel.2.By using the LMI mixed weight sensitivity H∞state feedback design method and choosing a certain special state points as standard state point on the trajectory, The thesis establishes the standard model and different model of SSB, designs two-loop robust BTT controller, and does the experiment of simulation.3.Using MATLAB/Simulink simulation software, The SSB's six degree of freedom simulation model is established, which including of body model, autopilot model, target model, realtive kinematics model, and guidance law model five parts, and followed to do the simulation of the whole trajectory.It is proved by theoretical analysis and digital simulation, the method of the BTT controller design with Robust Control theory has achieved good control effects. The works in this thesis will serve as helpful references for the application of engineering practices.