基于变结构控制的三维视线指令制导律设计

Design of a Three-Dimensional CLOS Guidance Law Via Sliding Mode Control

指令制导在区域防空中得到了广泛的应用,而视线指令制导是指令制导中最常用的方式。传统设计方法使用二维模型,并把弹体简化为质点,模型和实际系统有较大的出入。根据视线指令制导的三维六自由度拦截动力学模型构造了系统的状态方程和跟踪误差,将拦截问题转化为一个时变非线性系统的误差跟踪问题,使用变结构控制理论设计了制导律。并仿真验证了制导律的制导效果。

This paper design a new three-dimensional command line-of-sight(CLOS) guidance law via sliding mode control,which based on a six degrees of freedom flight model.The main idea lies in converting the three-dimensional CLOS guidance problem to the tracking problem of a time-varying nonlinear system.With the new design of tracking error,a new CLOS sliding mode guidance law was proposed.Through computer simulation,we investigate the guidance performance of our CLOS sliding mode guidance law.