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针对传统加速退化试验方案设计缺乏机理模型支持的问题,给出一种基于主机理层试验、关键部件仿真、参数解析和系统辨识于一体的加速退化机理模型建模方法.调研相关资料确定影响产品参数变化的主机理,通过主机理层试验得到有限元仿真输入参数,结合有限元仿真得到产品关键有限元输出参数,同时利用解析方法得到有限元输出参数和产品参数之间关系,根据系统辨识方法建立了加速退化机理模型.以加速度计为例,建立了加速度计标度因数稳定性加速退化机理模型,将模型结果与其在常温贮存条件下结果进行对比分析,结论显示该方法的有效性.
In view of the lack of support for the traditional accelerated degeneration experiment scheme, a model of accelerated degradation mechanism modeling based on the main physical layer test, the simulation of key components, parameter analysis and system identification is given. Investigate the relevant information to determine the impact of the product The main reason of the change of parameters is obtained through the main physical layer experiment, the finite element simulation input parameters are obtained, and the finite element output parameters of the products are obtained by the finite element simulation. At the same time, the relationship between the finite element output parameters and the product parameters is obtained by the analytical method. According to the system identification method A model of accelerating degenerate mechanism was set up.An example of accelerometer was established to accelerate the degradation of scale factor of accelerometer, and the model results were compared with the results under normal temperature storage conditions. The results show the effectiveness of the method.