普通的基于状态方程线性化的跟踪制导方法用于大扰动临近空间将造成较大的制导方法误差。文中设计了一种具有积分型切换函数的自适应滑模制导方法,该方法基于线性二次型调节器设计反馈增益,并在跟踪制导律中增加了自适应项,修正线性化跟踪制导的方法误差。在文中仿真条件下,文中方法落点偏差约为线性二次型跟踪制导的1/12,在大扰动情况下制导精度提高明显。

Common guidance method by status equation linearization will cause large guidance method error for near space vehicle. In this paper, an adaptive sliding mode guidance law with integral switch function (ISFASMG) was designed to track near space trajectory. ISFASMG designed the feedback gain by linear quadratic regulator (LQR) and corrected linearization error of status function and uncertain disturbances by adding an adaptive term. Under the simulation condition in this paper, the terminal error of ISFASMG is 1/12 of LQR tracking guidance, and the guidance precision is improved significantly in large disturbance environment.