电磁发射磁探针阵列位置分布及姿态优化

为更加精确地得到电磁发射系统内弹道中电枢在任意时刻的速度，提出一种磁探针阵列位置分布及安装姿态的计算方法。采用道格拉斯-普克算法确定磁探针阵列的位置分布，建立磁探针感应电压与磁探针安装位置、轨道电流、电枢速度及位移等物理量的数学模型，分析磁探针阵列安装方式、安装高度和安装深度对磁探针测量精度的影响。计算结果表明：磁探针阵列测量电枢出口速度的理论相对误差在2‰以内；内弹道电枢速度曲线的出口速度理论相对误差在5‰以内。对磁探针阵列安装位置及安装姿态进行试验验证，优化后的磁探针阵列具有更高的测量精度，电枢出口速度为700~800 m/s时，磁探针测量平均相对误差为2.25%.

Optimization on the Position Distribution and Attitude of Electromagnetic Emission Magnetic Probe Array

A calculation method for position distribution and installation attitude of magnetic probe array is proposed to obtain the armature velocity at any time in the interior ballistics of electromagnetic launch system accurately. The position distribution of magnetic probe array is determined by Douglas-Peucker algorithm. A mathematical model is established for the induced voltage of magnetic probe and the physical parameters such as installation position, track current, armature speed and displacement, and the influence of the attitude of magnetic probe on the speed measurement accuracy is studied. The installation method of the armature magnetic probe is adopted. The influences of installation mode, installation height and installation depth of magnetic probe array on the measurement accuracy of magnetic probe array were studied. The results show that the theoretical relative error of exit velocity of armature measured by the magnetic probe array is within 2‰, and the theoretical relative error of the internal ballistic armature velocity curve is within 5‰. The installation position and attitude of the magnetic probe array are tested and verified. The improved magnetic probe array has high measurement accuracy. When the armature exit velocity is 700-800 m/s, the measured average relative error of magnetic probe is 2.25%.