To explore the influence of the trace point step-jump behavior on a terminal guidance system, an analysis is performed from the line-of-sight rate (LOS rate) and guidance accuracy views for designing an anti-step-jump guidance law. First, the linear terminal guidance model under the trace point jump circumstance is constructed, and then the fundamental reason for the miss distance is investigated by deriving the upper bound of the LOS rate at the initial step-jump moment. Following this, the novel proposed analytical differential adjoint model is established with the adjoint method, and its validity is demonstrated comparing with the numeric derivative model. Based on the adjoint model, the effects of the ratio coefficient, the time constant, and the jump amplitude on the guidance accuracy are explored. Finally, a novel anti-step-jump guidance law is designed to shorten the recovery time of the overload. The simulations have shown that the faster recovery time and higher accuracy are achieved in comparison with the proportional navigation guidance, optimal guidance, and adaptive sliding mode guidance.

中文翻译：

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跟踪点跳跃行为的影响分析

为了探究跟踪点跳变行为对终端制导系统的影响，从视线率（LOS率）和制导精度视图进行了分析，以设计反跳变制导律。首先，建立了在轨迹点跳跃情况下的线性终端制导模型，然后通过推导初始跳步时视距率的上限来研究未命中距离的根本原因。在此基础上，采用伴随方法建立了新的解析微分伴随模型，并与数值导数模型进行了比较验证了其有效性。基于伴随模型，研究了比率系数，时间常数和跳跃幅度对制导精度的影响。最后，设计了一种新颖的反跳跳跃制导律，以缩短过载的恢复时间。仿真表明，与比例导航制导，最佳制导和自适应滑模制导相比，恢复时间更快，精度更高。