动能拦截器末制导控制系统建模与仿真

Modeling and Simulation of Guidance and Control of Kinetic Kill Vehicle in Terminal Process of Interception

对动能拦截器末段拦截的制导与姿态控制系统进行建模和仿真分析。首先建立末制导系统模型,其中包括拦截器结构模型、六自由度动力学与运动学模型、测量模型和制导控制律模型。重点分析了拦截器质心位置误差和发动机推力偏心造成的推力和力矩误差,以及由此造成的轨控系统与姿控系统的相互影响。采用一种分段末制导律,并将基于相平面分析的方法用于姿态控制律设计,以克服干扰力矩的影响。仿真分析表明,采用相应的轨控和姿控方案,能保证系统的稳定性,对目标进行成功拦截。

This paper investigated the modeling and simulation of the guidance and the attitude control systems of kinetic kill vehicle in the terminal process of interception. Firstly, the system models were constructed, including the structural model, the dynamic and kinetic model, the measurement model and the guidance and control law model. Then, much attention was paid to the thrust force and moment disturbances caused by the mass eccentric and jet propel misdirection. The consequent interaction between the orbit and the attitude control systems was analyzed. A four-phased terminal guidance law was therefore applied in controlling the Kinetic Kill Vehicle and an attitude control strategy was designed based on phase-plane analysis. Finally, simulation results show that the system stability can be ensured using the suggested orbit and altitude control schemes and the interception can be achieved successfully.