文中研究了相控雷达阵导引头数字稳定平台性能的两个主要参数:角跟踪时常数和去耦系数对导弹制导控制系统的影响。首先通过合理的假设和简化建立了相控阵捷联制导控制系统数学模型。随后利用劳斯判据法得到了耦合回路稳定性与角跟踪时常数和去耦系数的关系,利用伴随系统法研究了这两个参数对脱靶量的影响。理论分析和数字仿真结果表明,数字稳定平台的性能会影响耦合回路的稳定性并最终影响导弹的制导精度。

The influence of tracking loop time constant and decoupling coefficient on the missile guidance and control system is studied in this paper. The two parameters represent the performance of the digital stabilized platform for the phased array radar seeker. Firstly, a mathematical model of missile guidance and control system using strapdown radar seeker is established by reasonable assumptions. Then, the relationship between the stability of the coupling loop and the two parameters is obtained by using the Routh-Hurwitz criterion. The Ad-joint System Method is used to study the influence of the parameters on miss distance. Theoretical analysis and numerical simulation results show that the performance of the digital stabilization platform will affect the stability of the coupling loop and ultimately affect the miss dis-tance of the missile.