Design of Stochastic Sliding Mode Variable Structure Guidance Law based on Adaptive EKF

According to characteristic of interceptor terminal flying, the current stochastic model based AEKF algorithm was combined into the stochastic sliding model variable structure guidance law to design the interceptor terminal guidance law. Firstly, on the basis of the passive radar's angle measurement information, the current stochastic model based AEKF algorithm was used to obtain the relative-distance and relative-velocity. Secondly, the influence of system state noise and observation noise were taken into account, designed a stochastic sliding model variable structure guidance law, which had the merit of robustness and angle of sight convergence. The simulation results indicate that the current stochastic model based AEKF algorithm combined to stochastic sliding model variable structure guidance law has high estimation precision and improves the guidance precision and minishs the miss distance. It turns out to be much value in engineering applications.