Abstract
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.
Highlights
Cylindrical vibratory gyroscope is a kind of Coriolis Vibratory Gyroscope, which works with the Coriolis Effect of the elastic wave in the cylindrical resonator [1]
Yi Tao et al presented a precision trimming method based on cup-button trimming for cylindrical vibratory gyroscope [9], and Kai Zeng et al proposed a resonator-top trimming method [10]
This paper presented a temperature compensation method to measure frequency for cylindrical vibratory gyroscope, and it can decrease the effect of temperature on frequency effectively
Summary
Cylindrical vibratory gyroscope is a kind of Coriolis Vibratory Gyroscope, which works with the Coriolis Effect of the elastic wave in the cylindrical resonator [1] This kind of gyroscope has many advantages such as long service life, high operation accuracy, high reliability, small size, strong shock resistance, and low cost [2]. Yi Tao et al presented a precision trimming method based on cup-button trimming for cylindrical vibratory gyroscope [9], and Kai Zeng et al proposed a resonator-top trimming method [10]. In these trimming methods, frequency measurement plays an important role to conduct precision trimming
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