摘要
从工程应用角度分析了捷联导引头引起的寄生回路的数学模型。在频域内分析了由刻度尺误差、动力学延时对寄生回路稳定性的影响,根据幅值裕度和相角裕度计算出刻度尺误差和动力学延时允许的变化范围,在时域内对稳定边界进行了验证,证明了边界条件即为临界稳定状态。考虑寄生回路的影响提出了有效导航比的概念,分析了刻度尺误差对有效导航比的影响。对寄生回路提出了超前校正网络+增益控制,对寄生回路的幅值和相角裕度进行了设计,满足稳定性指标要求,补偿了刻度尺误差对有效导航比的影响,经仿真分析验证采用超前校正网络+增益控制,能够满足稳定裕度和比例导引控制有效导航比的要求,为工程研制提供理论参考。
From the engineering application point of view,the mathematical model of the parasitic loop caused by strapdown seeker is analyzed.In frequency domain,the influence of scale error and dynamic delay on the stability of parasitic loop is analyzed.The allowable variation ranges of scale errors and dynamic delays can be calculated according to the amplitude margin and the phase angle margin.The boundary of stability is verified in time domain,and it is proved that the boundary condition is the critical stable state.The concept of effective navigation ratio is put forward on the basis of the influence of the parasitic loop,the influence of scale error on effective navigation ratios is analysed.For the parasitic loop the lead correction network and gain control is put forward.The amplitude margin and the phase angle margin of the parasitic loop are desingned to satisfy the requirements of the stability indexes,the influence of scale error on effective navigation ratios are compensated.Simulation analysis verifies the use of lead correction network and gain control can meet the requirements of the stability margin and the effective navigation ratio for the proportional navigation and control,and can provides a theoretical reference for engineering development.
作者
杨泗智
YANG Si-zhi(Northwestern Polytechnical University,Academy of Astronautics,Xi’an 710072,China)
出处
《火力与指挥控制》
CSCD
北大核心
2021年第2期53-57,共5页
Fire Control & Command Control
基金
上海航天科技创新基金资助项目(SAST2015010)。