面向制导律设计的目标信息估计方法研究

摘要

Based on acceleration compensation for the sliding mode guidance law in missile and target status information on demand, the use of ultra sphere simplex the sigma sampling square root UKF filtering method estimates for target maneuvering information. This filtering method is a nonlinear function of the probability density distribution approximate rather than approximation of the nonlinear function, it is more accurate and to ensure the numerical stability than the extended Kalman filter in the processing of the nonlinear relationship of the missile and target. Finally, through the mathematics simulation ,verify the filtering algorithm goodness and guidance law applicability, the realization of large maneuvering target effectively intercept.%针对制导律对目标信息的需求问题，利用超球体单形sigma采样平方根UKF滤波方法估计出弹目相对运动信息，提高了制导精度。首先基于变结构控制方法设计了滑模制导律，其次，针对制导信息的需求，建立了超球体单形sigma采样平方根UKF滤波系统，该滤波方法在处理弹目非线性关系时，采用对非线性函数的概率分布进行近似而不是对非线性函数进行近似，在估计弹目状态信息时比扩展卡尔曼滤波更加精确，并且保证了数值的稳定性。最后通过数学仿真，不仅验证了该滤波算法的有效性，而且提高了对大机动目标的制导精度。