一维弹道修正引信弹道敏感技术

TRAJECTORY SUSCEPTIVITY FOR A ONE-DIMENSIONAL TRAJECTORY CORRECTION FUZE

根据“通过确定弹道上最小速度点的速度值及其出现时间即可完全而唯一的确定该条弹道”的结论 ,以单片机为弹道敏感测试系统的核心 ,采用微机电系统 (MEMS)压力传感器测量飞行弹丸轴向的迎面动压力 ,进而换算成弹丸的轴向速度 ,用单片机的内部定时器精确定时 ,从而解算出实际弹道参数 ,为一维弹道修正引信的控制系统提供控制信号。通过几种马赫数下的风洞实验 ,验证了测试系统的原理及实现的可行性。

Based on the conclusion that a trajectory can be determined through a measurement of the minimum velocity ( v min ) and the time ( t v min ) of the minimum velocity point on its trajectory, and a trajectory susceptivity system was thus built up. A micro controller is used as the core of the system. A MEMS pressure transducer is employed to sense the air pressure applied on the shell top. This pressure value is converted to the axial velocity of the shell. A timer inside the micro controller is used for the precise timing to determine t v min . Under the control of the micro controller, a correction value is obtained, and a signal is provided to the trajectory correction system. The trajectory susceptivity system is proved to be feasible both in theory and practice by wind tunnel experiments performed under several Mach numbers.