Integrated Guidance And Control Design Of Guided Bomb With Terminal Angle Constraint

The development trend of the modern guidance weapon not only demands its hitting the target precisely, reaching a desired miss distance, but also demands it can hit the target at a desired intersection angle, for the sake of maximizing the performance of the warhead.To improve the whole performances of missiles, more and more scholars suggest the guidance loop and control loop should be designed together, which is called the integrated technology. Different from the traditional separate parts, during the course of the integrated design, the guidance loop and control loop are treated as a whole and just according to the information of the relative motion between the missile and the target, a command of the actuator angle deflection is directly generated. So the integrated technology can not only insure the whole stability of the missile system, but also improve the potential performance of the missiles,simplify the course of the missile guidance and control system design, lower the cost of the missile, shorten the response time of missile, make the miss distance smaller as well.This paper is based on the guided bomb hitting the grounded fix target, by building the integrated model on the pitch plane, the research have done on the integrated guidance and control with terminal angle constraint, the main work are as follows:Firstly, relative motion between the missile and the target, the missile dynamics and kinematics equations in the pitch plane are analysed, the compact integrated guidance and control model is built.Secondly,considering the wide appliance of the optimal control on the design of guidance problem, the author uses the ?-D suboptimal control to complete the controller design in order to resolve the problem that the state-dependent Raccati equation is uneasy to get its analytical solution.Furthermore, the system of integrated guidance and control is with uncertainty, the author complete the controller design of the integrated guidance and control based on the overall consideration the theories of back-stepping control an sliding-mode control.Lastly, in order to compare with the traditional guidance and control design, based on the method of traditional design, this paper designs a optimal guidance law and a PID autopilot, then through simulations, a comparison between the integrated design method and traditional design method is done.