Study On Guidance And Control Of Moving Mass Reentry Missile

There are mainly three ways in missile maneuver control: Pneumatic ruddercontrol, Jet thrust control and Moving mass control. For Pneumatic rudder mode,surface ablation process and other issues are difficult to solve in high-speedflight; while the Jet thrust mode is subject to limited fuel and increase uselessload. Compared with traditional control ways, moving mass mode is of greatadvantages and has broad application prospects. For this thesis, in thebackground of maneuver penetration, the dynamics modeling, reentry guidanceand robust control of the moving mass missile are studied.Firstly, based on the Momentum Theorem and the Moment of momentumTheorem, Complete space motion model of moving mass reentry missile withsingle mass and four Roll thrusters is derived. The dynamics equations arecomposed of a three dimensional (3-D) translational dynamics equation of thesystem center of mass, a3-D rotational dynamics equation about the systemcenter of mass and a1-D translational dynamics equation of the moving pointmass.Secondly, an Optimal Guidance Law for Reentry missile with TerminalAngular Constraint is studied. According to the relative motion between themissile and the target, State-space equations and optimal index are established.Based on Limited time varying system quadratic optimal control theory, OptimalGuidance Law of the nosedive plane and the horizontal plane are deducedrespectively.Thirdly, an robust attitude control law of the reentry moving mass missileis studied. The flight control system is designed into three parts: the attitudeangle tracking control system, the moving mass position servo control systemand the pulse width modulator of the jet thrust. The H theory is appliedeffectively to solve the mix-sensitivity problem to meet a number of performancerequirements.Finally, the close-loop of the guidance and control is simulated by thecomplete space motion model, which verifies overall performance of the system.All the conclusions of the thesis can provide a reference to the development of the moving mass control technology of our country.