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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 overall performance of seeker isolation and its time-domain characteristics, an optimization method of inner and outer loops of seeker control system based on isolation characteristics is proposed. By establishing the seeker isolation model and deriving the isolation transfer function, the relationship between seeker isolation and the internal and external circuits is analyzed. The amplitude margin and phase margin constraints of the seeker are used to transform the amplitude-phase test method into the stability region for solving the control parameters. The objective function of the stability loop with the best isolation characteristic and the target function of the stability loop with time-domain response The optimal objective function of the tracking loop is to obtain the optimal design parameters of the seeker by solving the optimization problem in the stable region. The simulation results show that the optimal design method of inner and outer loops of seeker control system based on isolation characteristics can ensure the control system has better time domain performance and isolation characteristics.