Approach of determining accelerated degradation mechanism consistency's boundary for accelerometers

Through analyzing the Arrhenius model in the accelerated degradation testing, it is found that there is a close relationship between the operating stress and the slope of degraded trajectory in the accelerometer accelerated testing. The degradation trajectory models such as linear function, exponential function and power function were studied. The formulas on the operating stress and the slope of degraded trajectory were inferred from the perspective that the activation energy does not change. Then a method of determining accelerated degradation mechanism consistency's boundary was offered based on the slope interval inspection of degradation trajectory. Finally, according to the constant temperature degradation simulation test data of the accelerometer scaling factor stability, the accurate temperature boundary that ensured the scaling factor stability degradation mechanism is consistent was given. The result proves that the method is feasible.