平台导引头隔离度寄生回路特性分析  

Analysis on the characteristic of seeker disturbance rejection rate parasitical loop

作　　者：宋韬[1] 林德福[1] 祁载康[1] 孙宝彩[2] 

机构地区：[1]北京理工大学宇航学院,北京100081 [2]空军装备研究院装备总体论证研究所,北京100085

出　　处：《红外与激光工程》2013年第12期3309-3314,共6页Infrared and Laser Engineering

基　　金：国家自然科学基金(61172182)

摘　　要：平台导引头隔离度的存在不仅降低了导引头跟踪精度,其引起的隔离度寄生回路对导弹制导系统存在严重的影响。通过对平台导引头隔离度产生机理进行分析,分别建立了弹簧力矩和阻尼力矩引起的隔离度模型,在此模型的基础上利用劳斯判据分析了隔离度寄生回路稳定边界,并研究了寄生回路对制导系统有效时间常数和有效比例导引系数的影响。结果表明:为了保证隔离度寄生回路的稳定,需要限制制导控制系统主要参数的取值范围;在寄生回路的作用下制导系统有效时间常数和有效比例导引系数与原设计值发生偏差,需要重点关注。所得结论可以为导弹制导控制系统初步设计以及导引头总体指标确定提供理论参考。The seeker disturbance rejection rate not only severely degrades seeker tracking accuracy, but also has greatly issues for the missile guidance performance. The generation mechanism of disturbance rejection rate was analyzed, and the models of disturbance rejection rate caused by spring torque and damping torque were established. Based on the Routh criterion, the stability zone of parasitical loop was obtained. The effect of the parasitical loop on effective guidance time constant and effective navigation ratio was studied. The result shows that the limits for important guidance parameters should be determined to insure the stability of parasitical loop; both the effective guidance time constant and effective navigation ratio are changed on the action of parasitical loop. The conclusion is helpful for engineers at the preliminary stage of guidance and control system design.

关 键 词：导引头隔离度寄生回路 干扰力矩 稳定性 制导时间常数 比例导引系数 

分 类 号：TJ765.3[兵器科学与技术—武器系统与运用工程]