Design methodology of single crystal tuning fork gyroscope for automotive applications

This paper presents a method of designing a single crystal tuning fork vibratory gyroscope for stabilizing temperature sensitivity changes and reducing the noise from the external vibration by increasing the inertia moment of the device. As a result a detection mode Q value of 10,000 was realized. A sensitivity change of within /spl plusmn/5% was obtained after correcting the temperature dependence by a thermistor. Simultaneous incrementing of the inertia moment resulted in an enlargement of the fixed area of support. It was also found that the noise level from vibration decreased to less than 1/5.