超声速弹丸着靶时刻声学测试方法

Acoustic Test Method on Target Moment of Supersonic Projectile

摘要:

针对超声速弹丸终点弹道着靶时刻测试问题,研究了声学传感器测试机理,建立了声波延迟触发模型,开发了一套着靶时刻测试系统。采用传感器阵列采集超声速弹丸激波到达不同传感器的时间差,建立了测量超声速弹丸着靶时刻的数学模型,该模型包含了传感器坐标、时间差和弹丸着靶时刻。针对直线形传声器布阵,基于高斯-牛顿法对定位模型进行解算,分析了高斯-牛顿法的迭代公式、收敛性和适定性等。通过计算机仿真分析了误差大小和传感器数目对误差的影响。通过模拟试验数据计算表明,声学测试结果与实际结果一致。该方法应用在某型高炮试验任务中,成功测试了弹丸着靶时刻。

Abstract:

Aiming at the problem of the target time test of the supersonic projectile, the acoustic sensor test mechanism is studied, the acoustic wave delay trigger model is established, and a set of target time test system is developed. A sensor array is used to acquire the time difference of the supersonic projectile shock wave reaching different sensors. A mathematical model for measuring the target moment of the supersonic projectile is established, which includes the sensor coordinates, time difference and projectile target time. For the linear microphone array, the Gauss-Newton method is used to solve the positioning model, and the iterative formula, convergence and well-posedness of Gauss-Newton method are analyzed. The influence of the error size and the number of sensors on the error are analyzed by computer simulation. The calculations by simulation test data show that the acoustic test results are consistent with the actual results. The method is applied in a certain type of anti-aircraft test mission, and the time of projecting the target is successfully tested.