基于滑模观测器的鲁棒变结构一体化导引控制律

针对测量信息受限的远程制导炮弹精确末制导问题,提出了一种基于滑模观测器的变结构鲁棒控制方法,依据Lyapunov稳定性理论证明了其有效性;应用所提出的方法设计了一种两回路一体化导引控制律。考虑弹体短周期动力学特性及舵回路1阶动力学滞后,视气动参数偏差与目标机动为有界不确定项,建立了两回路导引控制一体化设计模型。外环以零化视线角速率为目标,生成虚拟俯仰角速率指令;内环确保实际俯仰角速率跟踪到外环给出的指令。仿真结果表明,在测量信息受限、存在气动参数偏差和目标机动不确定的条件下,所提出的导引控制一体化设计方法具有高命中精度和良好的过载特性。

Sliding-mode-observer-based Robust Variable Structure Control for Integrated Autopilot-guidance

A novel sliding-mode-observer-based variable structure controller is proposed and proved by Lyapunov’s theorem for integrated guidance and control(IGC) synthesis for extended range guided projectiles (ERGP) in order to realize hit-to-kill interception with limited measurement. Accounting for the short-period dynamics of the ERGPs and first-order lag of the canard servo, the two-loop IGC model is formulated in the presence of the discrepancies from aerodynamic parameters and target maneuver. The outer-loop of the IGC generates the commanded pitch rate to regulate the line-of-sight (LOS) rate to zero in finite time; the inner-loop is designed to track the outer-loop command. Simulation results show the effectiveness of the proposed controller and that the acceleration requirement is reduced.