大气层外多拦截器协同跟踪与制导算法

A full interception strategy of multiple interceptors is adopted in the scenario of a multi-warhead and multi-bait attack. We propose a cooperative tracking algorithm with fault diagnosis, a time cooperative guidance law of multiple interceptors and a terminal guidance law to eliminate the miss distance. Firstly, the measurement equation is linearized and the nonlinear tracking filter algorithm is simplified based on the least square algorithm and error propagation theory. In term of the filter algorithm, a sensor fault diagnosis method is designed to eliminate its influence on the tracking performance. Then, with a reasonable simplification on the dynamics of the interceptors and targets, an analytical solution of the relative motion is obtained, which contributes to the design of the time cooperative guidance law and the terminal guidance law with finite thrust to achieve the simultaneous destruction of multiple targets. The simulation results show that the designed cooperative tracking and guidance algorithm can effectively estimate the target state and eliminate the interference of the fault sensors, and implement the time cooperative interception for multiple targets.