多约束制导律与导引头隔离度制导匹配性研究

针对导引头隔离度影响多约束制导系统稳定性与制导精度的问题，推导了一种多约束制导律（GLMC），在此基础上构建了考虑导引头隔离度的多约束制导模型。研究了导引头隔离度和制导参数等对制导系统稳定性的影响规律，采用伴随函数法，分析了有无导引头隔离度影响情况下GLMC制导性能变化规律。结果表明，减小制导时间常数、增大隔离度幅值，以及剩余飞行时间的减小都会降低系统稳定性。GLMC能容忍的隔离度水平大约为1%，在实际工程应用中，要保证GLMC较为先进的制导性能，需严格控制导引头的隔离度水平，降低寄生回路对制导系统稳定性的影响。

Research on Guidance Matching of Guidance Law with Multiple Constraints and Seeker Disturbance Rejection Rate

A guidance law with multiple constraints (GLMC) is derived in light of the effect of disturbance rejection rate of seeker on the stability and guidance accuracy of the multi-constraint guidance system, and a multi-constraint guidance model is established, in which the disturbance rejection rate of seeker is considered. The effect of disturbance rejection rate and guidance parameters on the stability of guidance system is analyzed. In addition, the adjoint function is employed to analyze the guidance performance variations of the multi-constraint guidance law with or without the influence of disturbance rejection rate of seeker. The results indicate that any decrease in guidance time constant or flight remaining time as well as increase in the disturbance rejection rate will lead to a decrease in the stability of guidance system. The GLMC can sustain a disturbance rejection rate of about 1%. In the practical applications, it is essential to control the level of disturbance rejection rate of seeker strictly and reduce the effect of parasitical loop on the stability of guidance system so that a superior guidance performance of the multi-constraint guidance law can be ensured.