【摘要】 针对大气层外拦截器使用红外导引头对目标进行被动跟踪的问题,在修正球坐标系下建立了仅有视线角测量信息的非线性滤波方程组,根据轨控发动机的工作状态分阶段设计了拦截器的导引规律,兼顾制导精度与滤波系统的可观测性要求,结合无迹卡尔曼滤波算法估计精度高和易于计算的特点实现了对目标的跟踪与制导信息的估计。以动能拦截器拦截处于自由段飞行的弹道导弹弹头为背景构造了计算机仿真试验,试验结果表明算法的跟踪效果和稳定性较好,拦截精度较高。更多还原

【Abstract】 Aiming at the passive target tracking of the exo-atmospheric interceptor with the IR seeker, the filtering equations were established in the modified spherical coordinates(MSC).The guidance law was designed based on different work states of the divert thrusters, considering the hit accuracy and the observability of the filtering system.The unscented Kalman filter was applied to realize the target tracking and the estimation of guidance information, because of its accuracy advantages and easy-implementation.A computer simulation experiment that an interceptor intercepted a ballistic missile flying out the atmosphere was constructed to prove the validity, stability and high interception accuracy of the algorithm.更多还原