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In the process of frequency split trimming, the fluctuation of environmental temperature causes a deviation in measuring the natural frequency, which is bigger than the request trimming accuracy. Therefore, a measuring method with temperature compensation is proposed to reduce this impact. Firstly, the relationship between natural frequency of resonator and environmental temperature are studied by experiments. Furthermore, the corresponding model of temperature compensation is proposed, which is written into the measuring unit to calculate the compensated frequency. The frequencies before and after temperature compensation are measured to prove the correctness of this method. At last, a real time measuring experiment is accomplished to verify the feasibility in frequency split trimming. Results show that the effect of temperature on the natural frequency reduced significantly with the temperature compensation measuring method. The proposed method is applicable for other types of vibratory gyroscope in precision frequency measurement.

A temperature compensation method of measuring frequency for cylindrical vibratory gyroscope in frequency split trimming