导引头末制导目标精度控制仿真研究

Simulation Study on the Precision Control of Seeker Terminal Guidance

在制导系统设计中,分析论证导引头隔离度指标具有重要的工程意义。为了建立论证导引头隔离度指标的仿真分析方法,从制导回路稳定性和制导精度两方面研究了导引头隔离度对于制导系统的影响。建立了含隔离度模型的平台导引头模型和含隔离度寄生回路的制导系统模型,基于隔离度寄生回路模型研究了隔离度幅值和相位特性对寄生回路稳定性的影响。其次,基于某空地导弹六自由度弹道仿真以及含隔离度寄生回路的制导系统模型仿真研究了隔离度对制导精度的影响。仿真结果表明:隔离度幅值增大相位滞后对于隔离度寄生回路稳定性以及制导精度有不利影响。建立的仿真研究方法和所得结论可以为导弹制导控制系统设计和导引头隔离度指标的论证提供依据。

In the design of guidance system,it is of great engineering significance to analyze and demonstrate the index of seeker disturbance rejection rate.In order to establish the simulation analysis method for demonstrating the index of seeker disturbance rejection rate,the effect of seeker disturbance rejection rate on guidance system was studied from two aspects of guidance loop stability and guidance accuracy.The model of platform seeker containing disturbance rejection rate and the model of guidance system containing seeker disturbance rejection rate parasitic loop were established.The effects of amplitude and phase characteristic of disturbance rejection rate on parasitic loop stability was studied based on the model of parasitic loop.Then,the effect of disturbance rejection rate on guidance accuracy was studied based on a missile six degrees of freedom trajectory simulation and the model of guidance system containing seeker disturbance rejection rate parasitic loop.The study shows that the increase of disturbance rejection rate amplitude and phase lag have an adverse effect on parasitic loop stability and guidance accuracy.The simulation research method and the result can provide the basis for the design of the missile guidance control system and the demonstrating of the index of seeker disturbance rejection rate.