基于隔离度特性的导引头控制系统优化设计

摘要

为了提高导引头隔离度及其时域特性的综合性能,提出了一种基于隔离度特性的导引头控制系统内外回路优化设计方法.通过建立导引头隔离度模型,推导隔离度传递函数,分析了导引头隔离度与内外回路的关系.将导引头幅值裕度和相位裕度约束,采用幅值-相位测试方法转化为求解控制参数的稳定域,分别建立了以隔离度特性最优的稳定回路目标函数和以时域响应特性最优的跟踪回路目标函数,通过在稳定域内求解优化问题,得到导引头的优化设计参数.仿真结果表明,采用基于隔离度特性的导引头控制系统内外回路优化设计方法,能够保证控制系统具有更好的时域性能和隔离度特性.%In order to improve the disturbance rejection rate and time characteristics of a seeker,an optimization design of seeker control system in the inner-loop and outer-loop respectively based on the disturbance rejection rate is proposed.The mode of disturbance rejection rate of seeker is established and the disturbance rejection rate function is derived.The relationship between the disturbance rejection rate and inner and outer loops is analyzed.The amplitude margin and phase margin constraints of seeker are converted into the stable domain of the control parameters by the amplitude-phase test method.The optimized design parameters of seeker are obtained by optimization the disturbance rejection rate objective function of in the stabilizing loop and time response characteristics objective function in the optimal tracking loop respectively,within the stable region.The simulation results show that the optimized seeker control system has better time domain performance and improves the disturbance rejection rate.