A guidance law design method for observability enhancement considering radome errors
To solve the guidance problem that radome errors exist in radar-homing missile seeker while the error slope cannot be estimated accurately due to the weak observability of the control system with Proportional Navigation Guidance(PNG),a guidance law which can improve observability is proposed.An improved nonlinear numerical algorithm is designed,where observability can be analyzed periodically and quantitatively,and a piecewise continuous strategy is proposed to make it compatible with the observability analysis of discontinuous guidance systems.An improved guidance law with variable gain is designed according to the observability analysis results,which guarantees the observability of the guidance system and eliminates the hysteresis of Adaptive Intermittent Maneuver guidance(AIM).An exact linearization method is applied to the guidance system and the stability of the proposed system is analyzed through Lyapunov theorem.The simulation results show that compared with the traditional guidance method,the improved guidance method can enhance the observability of the guidance system and achieve a smaller miss distance when the seeker is disturbed by radome errors.
NETL
NSTL
万方数据
