Temperature Modeling and Compensation of Double h Quartz Tuning Fork Gyroscope

Abstract

The double-H quartz tuning fork has a (zyω)5° cut shape[1], its structure and vibration mode are different with H quartz tuning fork clearly, and we have applied for a patent for the structure of the double-H quartz tuning fork gyroscope. It is desired that the driving signal has very high frequency stability and amplitude stability on the operation of the quartz tuning fork. But, the quartz tuning fork resonant frequency of the reference mode may change with temperature, and if the driving signal frequency can’t automatically track the resonant frequency of the reference mode, the error signal will appear in the output angular rate signal. Based on the severe nonlinearity drift error induced by temperature change, a practical and precise composite model was proposed to compensate the error caused by temperature change. The double-H quartz tuning fork gyroscope temperature modeling was set up by test experiment and data processing at full temperature range, the accuracy of the double-H quartz tuning fork gyroscope was improved greatly by utilizing temperature compensation, and the experiment results indicate that the method is useful and feasible.