捷联制导旋转弹制导信息提取研究CSCD

以捷联式半主动激光导引头为研究对象,研究其应用在旋转弹上制导信息的提取方法。根据坐标转换关系得到旋转弹惯性系视线角解耦模型,由于导引头和速率陀螺仪具有测量误差特性,直接解耦得到的制导信息会产生较大的误差。基于视线角解耦模型的非线性,采用扩展卡尔曼滤波(EKF)的方法对测量信息进行滤波处理,估计出目标的位置,从而得到捷联式半主动激光导引旋转弹的制导信息。将扩展卡尔曼滤波方法与α-β滤波方法进行对比分析,得到扩展卡尔曼滤波方法对捷联式半主动激光导引旋转弹制导信息的估计精度更高,收敛更快。

Research on Guidance Information Extraction of Strapdown Guided Spinning Missile

Taking strapdown semi-active laser seeker as the research object,the guidance information extraction method of strapdown semi-active laser seeker in a spinning missile is studied.According to the coordinate transformation relationship,the Line of Sight(LOS)angle decoupling model of the inertial system of the rotating missile is obtained.Because the seeker and the rate gyroscope have measurement errors,the guidance information obtained by direct decoupling has large errors.Based on the nonlinearity of the LOS angle decoupling model,the Extended Kalman Filter(EKF)method is used to filter the measurement information and estimate the position of the target.The guidance information of strapdown semi-active laser guided spinning missile is obtained.And the extended Kalman filter method and theα-βfiltering method are compared and analyzed.The guidance information with the extended Kalman filter method for strapdown semi-active laser guided spinning missile has better accuracy and faster convergence speed.