Abstract:
In a vibratory gyrosensor, a high-quality factor and no frequency difference between driving and detecting frequencies are necessary to construct a high-sensitivity gyrosensor. In order to adjust driving and detecting frequencies and driving position of the resonator in the gyrosensor, mechanical trimming, which means the partial cutting toward the resonator, is effective; however, such a trimming is complicated. For a method of electrical changing of the resonance frequencies of the resonator, it is well known to insert a condenser between the driving circuit and the driving electrode of the resonator; however, that method is usually used for a slight adjustment of the resonance frequency. On the other hand, a method was devised to change the resonance frequency of the piezoelectric vibrator, using damped capacitance elimination techniques, and it was utilized to a driving circuit of the vibratory gyrosensor. In this paper, sensitivity characteristics of the gyrosensor, whose driving frequency is changed using the damped capacitance elimination circuit, are reported.