基于非光滑控制的三维制导律设计

针对机动目标寻的制导中带有终端角度约束的制导律设计问题,提出了基于非光滑控制的制导律设计方法。首先建立了飞行器与目标的三维相对运动模型,应用非光滑控制方法,设计非线性制导律,使齐次系统满足渐近稳定和齐次度为负的条件,达到终端角度要求。其次,应用高增益观测器对制导信息进行估计,通过对观测器状态进行扩张,完成目标机动加速度的估计。最后,对所设计的制导律进行了数值仿真,校验了设计方法的有效性。

Three-dimensional Guidance Law Design Based on Non-smooth Control

A guidance law design method based on non-smooth control is proposed with the terminal line- of-sight angle constrained in maneuvering target homing. Firstly, the three-dimensional model of the rela- tive motion between an aircraft and its target is constructed. Non-smooth control approach is applied to design a nonlinear guidance law. The closed-loop guidance system becomes homogeneous with a negative homogeneity degree and is asymptotically stable which guarantees the terminal angle. Secondly, a high- gain observer is used to estimate necessary guidance information. The state of the observer is augmented to estimate the maneuvering acceleration of the target. At last, numerical simulation is carried out which shows the effectiveness of the proposed design method.