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针对打击机动目标时带攻击角度约束的制导问题,采用扩张状态观测器和动态面控制方法设计一种考虑自动驾驶仪动态特性的制导律.考虑期望视线角的变化率正比于未知的目标加速度,采用扩张状态观测器对未知目标加速度进行估计.为了避免奇异问题,并克服非匹配不确定项对系统性能的影响,采用非奇异终端滑模和动态面控制方法进行制导律设计.与传统的将目标加速度设为零的制导律相比较,仿真结果表明所提出的制导律具有良好的制导性能.
A guidance law considering dynamic characteristics of autopilot is designed by using the extended state observer and dynamic surface control method in view of the guidance problem of attack angle constraint when striking a maneuvering target. Considering that the expected rate of change of line-of-sight is proportional to the unknown target acceleration, In order to avoid singularity problems and overcome the influence of unmatched uncertainties on the system performance, the non-singular terminal sliding mode and dynamic surface control method are used to design the guidance law. Compared with the guidance law that the target acceleration is set to zero, the simulation results show that the proposed guidance law has good guidance performance.