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干扰力矩做为影响导引头隔离度的重要参数,对制导系统产生了重要影响,在快响应制导系统设计中,要求尽可能降低干扰力矩的影响。针对干扰力矩的非线性、非定常特性,位标器稳定平台建模误差以及制导回路约束,提出干扰力矩自适应补偿控制方法。设计思路为:由制导精度分析,得到隔离度的频带约束;通过状态滤波及制导指令中引入非破坏性抖动信号,估计干扰力矩的主导项:滚动摩擦力矩;然后,运用带通滤波、状态反馈方法补偿非期望的干扰力矩。仿真结果表明:在参数摄动条件下,滚动摩擦力矩系数估值精度、快速性满足要求;提出的自适应补偿设计方法更贴近工程实际,能够用于解决寄生耦合影响严重的问题。
As an important parameter that influences the isolation of seeker, disturbance torque has an important influence on the guidance system. In the design of fast response guidance system, it is required to reduce the influence of disturbance torque as much as possible. According to the nonlinear and unsteady characteristics of disturbance torque, the modeling error of the stable platform of the marker and the constraints of the guidance loop, an adaptive compensation control method of disturbance torque is proposed. The design idea is as follows: the guidance of the guidance precision, get the isolation of the band constraints; through the state filtering and guidance instructions introduced non-destructive jitter signal, the leading interference torque estimation item: rolling friction torque; and then, using band-pass filtering, The method compensates for the undesired disturbing torque. The simulation results show that under the condition of parameter perturbation, the accuracy and speediness of the rolling friction torque coefficient meet the requirements. The proposed adaptive compensation design method is more close to the engineering practice and can be used to solve the problem of serious impact of parasitic coupling.