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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。
In order to solve the problem of maneuvering target design with guidance angle constraint in guidance, a guidance law design method based on nonsmooth control is proposed. Firstly, the 3D relative motion model between the aircraft and the target is established. The non-smooth control method is adopted to design the nonlinear guidance law so that the homogeneous system satisfies the condition of asymptotic stability and homogeneous degree of negative to meet the terminal angle requirements. Secondly, the high-gain observer is used to estimate the guidance information, and the state of the observer is expanded to complete the estimation of the target maneuvering acceleration. Finally, the numerical simulation of the guidance law is carried out to verify the validity of the design method.