石英加速度计故障机理研究与仿真建模验证

针对加速度计故障定位测试方法不明确、周期长且定位不准确的问题,对加速度计故障机理进行研究以及验证.首先,通过对加速度计结构、工作机理、试验环境等方面的结合分析,从理论上研究了加速度计正负饱和、无输出等常见故障模式;其次,通过故障机理分析与20多种试验仿真模拟,建立每一种故障对应的故障模式;结果表明:加速度计每种故障与测...

Research on the failure mechanism and simulation modeling verification of quartz accelerometer

Aiming at the problems of unclear accelerometer fault location test method, long period and inaccurate location, the fault mechanism of accelerometer is studied and verified in this paper. Firstly, by analyzing the structure, working mechanism and test environment of the accelerometer, the common fault modes such as positive and negative saturation and no output of the accelerometer are studied theoretically; secondly, through fault mechanism analysis and more than 20 kinds of test simulation, the corresponding fault mode of each kind of fault is established; the results show that each fault of accelerometer has a unique correspondence with the test index. With ±1 g output, positive and negative static current I+ and I-, sensor characteristics, torquer characteristics, the accelerometer fault causes can be quickly mapped. To improve the adaptability and responsiveness of the accelerometer, the accelerometer should be restored, repaired or replaced according to the cause of the failure. This study can be used for fast fault location of quartz accelerometer in model application, and can also provide theoretical basis for the optimization and improvement of accelerometer design and process.