高速气流对冲击振动加速度测试的影响

在火箭炮和导弹发射过程中,用于测试发射装置振动加速度的加速度计会受到高速气流的冲击。为了探究高速气流对加速度测试可能造成的影响,本文介绍了有关实验室及靶场测试方法与结果。在实验室内是采用压缩空气,模拟高速气流环境,观测加速度计分别在裸露与掩埋状态下的响应曲线。通过对测试曲线的比较分析,并结合靶场测试结果,得出在高速气流环境下应对加速度计进行气流防护的结论,该结论及试验方法对火箭炮和导弹发射装置的加速度测试具有一定的借鉴意义。

Effects of High-speed Airflow on Measurement of Shock Acceleration

In the firing of rockets and missiles, the accelerometer used to measure the vibration of the launch device may suffer impacts by the high-speed airflow. In order to explore the effects of high-speed airflow on acceleration measurement, this paper introduces the protecting treatment and the measurement results in laboratory and field test. In laboratory test, the compressed air was used to simulate the blowing of the high-speed air flow, and the acceleration signal of a naked accelerometer was compared with that of the shielded accelerometer. With the laboratory and the subsequent field test, it is concluded that the accelerometer under the high-speed air flow must be protected with proper shield devices. The conclusion provides some useful and meaningful references for acceleration measurement under similar circumstances.