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以比例导引基本模型为基础,分析了偏置比例导引的制导方法。建立了偏置比例导引制导律数学模型,推导了偏置比例导引表达式,分析了偏置项作用时间、作用起止时间、期望落角和导航比等对偏置比例导引的影响。从弹道、过载和落角三个方面对比分析偏置比例导引与弹道成型制导律。在达到角度约束的前提下,弹道成型制导律需要预估剩余飞行时间,而偏置比例导引制导律不需估计,减少了估计值可信度对制导律的影响,有利于其工程应用。
Based on the basic model of proportional guidance, the guidance method of bias proportional guidance is analyzed. The mathematical model of bias proportional guidance law is established. The bias proportional guidance formula is deduced. The influence of biasing term such as start-stop time, expected start-off angle and navigation ratio on the bias proportional guidance is analyzed. From the aspects of trajectory, overload and landing angle, the bias proportional guidance and ballistic guidance law are compared and analyzed. Under the constraint of angle, the ballistic guidance law needs to estimate the remaining flight time, while the bias proportional guidance law needs no estimation, which reduces the influence of the reliability of the estimate on the guidance law and is beneficial to its engineering application.