Dynamic characteristic analysis of high-g accelerometersbased on Hopkinson bar
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摘要: 基于Hopkinson杆激光干涉冲击试验台,分析了高g值加速度传感器的动态特性，主要分析了实现高g值加速度传感器的幅频特性的原理及可行性。该方法采用Hopkinson杆作为高g值加速度信号发生器，并应用激光光栅干涉仪可以精确地获得高g值加速度脉冲的激励波形，再与加速度计的输出联合处理得出传感器的动态校准结果。并用988压电传感器的动态校准结果加以说明。
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关键词:
- 激光干涉仪 /
- 动态特性 /
- Hopkinson杆技术 /
- 校准
Abstract: Based on Hopkinson bar laser interference shock test-beds, this paper analyzed the dynamic characteristics of high-g acceleration sensors, discussed the concept and feasibility to achieve the amplitude-frequency characteristics of a high-g accelerometer. This method adopted Hopkinson bar as the shock acceleration generator, applied a laser-grating interferometer to obtain the time history of the input acceleration with high accuracy, and processed the waveform combining with the output of accelerometer to obtain the dynamic calibration results. The dynamic calibration result of 988 piezoelectric sensors was given. -
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