基于非奇异Terminal滑模的导弹末制导律研究

结合导弹拦截的精确末制导问题,提出了一种基于非奇异Terminal滑模的鲁棒末制导设计方法。基于Terminal滑模控制中滑模面上的跟踪误差能够在有限时间内收敛到零的思想,在末制导滑模中引入非线性项,代替传统线性变结构滑动模态的设计,同时将目标的机动加速度视为已知的有界扰动,并实时对极值进行自适应估计,推导出一种非奇异Terminal滑模制导律(TSMG)。导弹在TSMG制导律的导引下,弹目视线角速度可以快速收敛,从而保证导弹有很高的命中精度。仿真结果表明非奇异Terminal滑模制导律设计的有效性。

Research on Terminal guidance law of missiles based on nonsingular terminal sliding mode

A new robust terminal guidance law based on nonsingular Terminal sliding mode is proposed for the case of missile interception.Based on the terminal variable structure control theory in which the tracking error on the sliding surface can converge to zero in a finite time,a nonlinear term is introduced into the traditional linear sliding mode design of the Terminal guidance law.Considering the maneuvering acceleration of targets as a disturbance with known boundary and making an adaptive estimation to extremes in real time,a nonsingular terminal sliding mode guidance law(TSMG) is presented.Controlled by TSMG,the rate of the line-of-sight(LOS) angle between missile and target can converge quickly,which ensures the missile has higher guidance precision.Simulation results show that the TSMG law is effective.