Temperature Self-compensation Method of Quartz Vibrating Beam Accelerometer
Quartz vibrating beam accelerometer has output drift in temperature-changing environment.This article used a new software compensation method to suppress the temperature drift.This solution used the quartz beams'own resonant frequency to characterize the reference temperature and established a temperature compensation model.Compared with using the temperature sensor output as the reference temperature,this method had no temperature measurement error.Regarding the compensation algo-rithm,a temperature compensation model based on the sparrow search algorithm to optimize the BP neural network was proposed,which can overcome the problem that the BP neural network easily falled into local optimality and improve the compensation accu-racy.Model was established based on many temperature experiments,and the output values before and after compensation were compared.The bias stability dropped from 392.8 μg to 65.5 μg,which can prove the effectiveness of the compensation method.
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