高速再入飞行器的变结构控制及其六自由度仿真研究

Variable Structure Control for High Speed Reentry Aerocraft and Its Simulation Studies

针对高速再入飞行器模型的快时变、强耦合及严重非线性的特点 ,采用变结构控制方法设计了自动驾驶仪 ;同时 ,采用最优化设计理论与理想速度曲线相结合的方法 ,设计了能同时保证末端制导精度及速度方向、大小的制导律。最后 ,进行了系统六自由度仿真 ,结果表明 :本文设计的制导律及控制方案合理、有效 。

In this paper, an autopilot design scheme is presented with variable structure control method against the fast time varying, strong coupling and high nonlinear feature of the high speed reentry aerocraft dynamics. Furthermore, a guidance law is proposed by using combination of optimal guidance law design with ideal velocity curve approach. The terminal guidance accuracy, the direction and amplitude of the aerocraft velocity are guaranteed by using the derivative guidance law. Finally, 6 \%DOF\% simulation is taken based on a kind of reentry aerocraft. The results show that the proposed control scheme and the guidance law are rational, effective and easy for implementation.