Designing And Simulating Control System For A Self-rotary Missile Of The Air Defense Missile/Gun Weapon System

Focused on the new research direction of missile/gun air defense weapon system, how to design the autopilot of the self-rotary missile is studied in this dissertation. The dynamic and kinetic model, which can represent the flight states of the self-rotary missile, is established by engineering technique. The autopilot of this type of ground-to-air missile (GAM) is designed based on the PID control theories and the Pole placement gain selection methods. The methods that build up the control system of the missile are discussed in detail, too. And the simulation of the procession ismade finally. The mainly work of the paper could be described as follows:(1) A new air defense missile/gun weapon system is studied, the parts which compose the system and their characters are described, the different styles which used in Russian, American and other countries now is introduced, the development of the new air defense system in the future is also forecasted.(2) A certain type of rotary missile, which is serviced in the Chinese army now is introduced and studied. As the missile is rotated, the way of design the autopilot is unusually. Especially by mixing the guiding signal and basis signal, the control signal is picked up, which is proportional to the guiding signal. Furthermore, we added a linearization signal to the control signal and got a PWM signal to control the rudder, then produced the average control force, which is proportional to the guiding signal.(3) On the principle of air dynamics theories and classical control theories, the nonlinear mathematical model of the rotary missile is established without the consideration of cross-couplings. For engineering purpose, an approximate linearization is inferred with linearization assumptions at given equilibrium points.(4) Based on Pole placement gain selection methods, the control system to stabilize the stance of the missile is analyzed and designed; a compensation device is introduced to the system to make the dynamic performance of missile robust; how to build up the physical system is introduced in detail.(5) PID control theories are widely studied in the paper, and the control system of the rotary missile is designed by PID control methods under computer assistant.(6) Because of the dynamic characteristic of the rotary missile is changed via the variation of flight altitude, speed and meteorological condition, the simplified model and nonlinear model respectively, the simulation is done for the flight states under different initial condition. The autopilot is finally affirmed correct on the analysis of the simulation result.