基于模糊理论的加速度计标度因数稳定性分析

运用模糊理论描述了影响加速度计标度因数稳定性诸多因素的不确定性问题,针对其中的磁钢磁感应强度和石英摆片热膨胀系数两类稳定性影响因素,给出了其三角模糊数区间,并通过该型加速度计的磁-结构耦合ANSYS分析求出了在模糊参数不同组合下的仿真输出,根据仿真输出结果获得了标度因数模糊稳定区间,给出了加速度计标度因数稳定性分析流程及实例.分析说明了基于模糊理论的稳定性分析方法可以为加速度计加速稳定试验截止条件提供依据,对提高加速度计标度因数长期稳定性水平具有重要意义.

Stability analysis on scale factor of accelerometer based on fuzzy theory

Fuzzy theory was used to analyze the scale factor stability of accelerometer, since many affected factors of scale factor of accelerometer emerged some uncertainty nature, which can be describe by fuzzy theory. Specifically, triangular fuzzy numbers was used to derive the changing interval of magnetic flux density and thermal expansion coefficient of quartz material, which is the dominant affected factors for scale factor stability, according to the different combination of triangular fuzzy numbers results, ANSYS magnetic-structure coupling simulation was introduced to get the different accelerometer simulation output, and then obtained the scale factor fuzzy stability interval, which was applied to the analysis of scale factor stable condition in the accelerometer accelerated stability test and the conclusion was properly. The conclusion illustrate that fuzzy theory analysis of scale factor stability can provide appropriately condition in the accelerometer accelerated stability test, for neither waste the cost of the test nor inadequate for the result, the conclusion also have great significance to the improvement of accuracy level for the long-term stability of accelerometer scale factor.