Effect of radome parasitic loop and on-line compensation of self-tuning control

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.