CAJ | 학술논문

针对高g值加速度传感器脉冲校准中遇到的激励脉冲宽度问题，通过有限元分析法，模拟Hopkinson杆校准系统中激励加速度脉冲的产生过程，确定适用于加速度传感器冲击灵敏度校准和频率响应特性校准的激励脉冲宽度及其相应的碰撞组合；并通过试验手段，验证了仿真结论的正确性。试验结果表明，通过改变子弹头的形状和调整垫的材料和厚度，可以在同一Hopkinson杆校准系统中产生不同持续时间的激励脉冲，以适应不同的校准需求，最大限度地发挥Hopkinson杆校准系统的潜能。
침대고g치가속도전감기맥충교준중우도적격려맥충관도문제，통과유한원분석법，모의Hopkinson간교준계통중격려가속도맥충적산생과정，학정괄용우가속도전감기충격령민도교준화빈솔향응특성교준적격려맥충관도급기상응적팽당조합；병통과시험수단，험증료방진결론적정학성。시험결과표명，통과개변자탄두적형상화조정점적재료화후도，가이재동일Hopkinson간교준계통중산생불동지속시간적격려맥충，이괄응불동적교준수구，최대한도지발휘Hopkinson간교준계통적잠능。
In order to determine the duration of shock pulse exciting a highg accelerometer, a finite element method is used to simulate propagation of stress pulse and generation of acceleration pulse in a Hopkinson bar. The excitation pulse width is conformed for the calibration of shock sensitivity and frequency response characteristic of a high-g accelerometer. These excitation pulses are generated by using the corresponding collision component including projectile and adjusting pad. It is demonstrated that the excitation pulses with different duration can be generated in the same Hopkinson bar by changing the bullet shape of projectile and the material and thickness of adjusting pad to excite a high-g accelerometer for different calibration parameters.