天线罩寄生回路影响与自校正控制在线补偿

Effect of Radome Parasitic Loop and On-line Compensation of Self-tuning Control

以雷达寻的导弹的制导系统设计为应用背景,建立了天线罩寄生回路模型,采用无量纲方法分析了寄生回路对制导系统稳定性及制导性能参数的影响。基于极点配置自校正控制理论提出了一种天线罩寄生回路的在线补偿方法,并进行了仿真验证。研究结果表明,天线罩误差斜率的存在导致寄生回路的生成,从而削弱整个制导系统的稳定性,且随着剩余飞行时间的减小,制导系统稳定性恶化加剧,寄生回路会改变制导系统的有效制导时间常数和有效导航比,从而影响制导精度。所提补偿方法能够有效地完成对寄生回路的在线补偿,且具有良好的适应性和鲁棒性,从而达到了增强制导系统稳定性,改善制导系统性能的目的。

A radome parasitic loop model is established for the design of guidance system in radar homing missiles. The effects of radome parasitic loop on thestability and guidance performance parameters of guidance system are analyzed by using thedimensionless method. A real-time compensation for radome parasitic loop is proposed based on the theory of pole placement self-tuning control,and a simulation is performed. The research results indicate that the radome error slope leads to parasitic loop,which weakens the stability of guidance system,and deteriorates the stability when the time-to-go decreases. The parasitic loop may change the effective guidance time constant and effective navigation ratio of guidance system,thus reducing the guidance accuracy. The compensation method can make the parasitic loop be compensated effectively with good adaptability and robustness so that the stability and performance of guidance system are improved.