引信外弹道加速度测量方法  

External Trajectory Acceleration Measurement Method of Fuze

作　　者：牛伟萌 房立清 李旭 霍瑞坤 齐子元 郭德卿 NIU Weimeng;FANG Liqing;LI Xu;HUO Ruikun;QI Ziyuan;GUO Deqing(Artillery Engineering Department,Shijiazhuang Campus of Army Engineering University,Shijiazhuang 050003,Hebei,China;Missile Engineering Department,Shijiazhuang Campus of Army Engineering University,Shijiazhuang 050003,Hebei,China)

机构地区：[1]陆军工程大学石家庄校区火炮工程系,河北石家庄050003 [2]陆军工程大学石家庄校区导弹工程系,河北石家庄050003

出　　处：《火炮发射与控制学报》2020年第1期93-98,共6页Journal of Gun Launch & Control

摘　　要：为了实现弹丸外弹道切向加速度的有效测量,使加速度测量更具理论基础,在实际应用时更具参考价值,提出利用MEMS加速度传感器测量轴向加速度以代替切向加速度的测量方法。利用六维刚体外弹道模型分析了弹丸运动过程中攻角随着弧长和射角的变化规律,并以此为基础计算利用两种加速度进行弹道弧长解算的误差,仿真试验发现,攻角变化很小,两种加速度变化规律差异很小,利用两种加速度计算出的弧长误差也很小,在有限距离内可以利用轴向加速度进行弧长解算。利用MEMS加速度传感器进行测量系统设计,并进行实弹射击试验,试验结果表明该方法能准确获得弹丸外弹道的加速度,加速度变化规律和范围在误差允许的范围内与仿真试验结果基本一致,在弹丸外弹道性能分析、惯导系统设计以及精确制导弹药研制方面具有广阔的应用前景。A measurement method using MEMS acceleration sensor to measure axial acceleration instead of tangential acceleration was proposed to achieve effective measurement of the tangential accele-ration of the external ballistic trajectory of the projectile, make the measurement of acceleration more theoretically based and more valuable in practical applications. The six-dimensional rigid ballistic mo-del was used to analyze the variation of the angle of attack with the arc length and the angle of the shot during the motion of the projectile, with the variation of attack angle with arc length and firing angle in the course of projectile motion analyzed based on the six-dimensional rigid-body trajectory model, and with the error of calculating trajectory arc length with two accelerations calculated. The simulation results show that the variation of attack angle is very small, the difference between the two accelerations is very small, and the error of arc length calculated with two accelerations is also very small. The axial acceleration can be used to calculate the arc length within a finite distance. The MEMS accelerometer can be used to design the measurement system, with the live-shot test carried out. The test results show that the method can accurately entail the acceleration of the external ballistics of the projectile. The variation law and range of the acceleration are basically consistent with the simulation test results in the error tolerance range. It has broad application prospects in the analysis of external ballistic perfor-mance, the design of inertial navigation system and the development of the ammunitions of precision guided missiles.

关 键 词：外弹道加速度 引信轴向加速度 MEMS加速度传感器 

分 类 号：TJ430[兵器科学与技术—火炮、自动武器与弹药工程]