Experimental validation of temperature self-compensation for LiTaO 3 piezoelectric gyroscope

To improve accuracy and stability, the authors are studying a flexural vibrational H-type gyroscope using a LiTaO₃ single crystal with sharply suppressed leakage output. Using the equivalent circuit deduced from the experiment, we have proposed an automatic compensation method for the temperature characteristics of sensitivity and drift. We operate the piezoelectric gyroscope in the drive H-mode at the resonant frequency of the detection tuning fork mode and introduce the additional transducer to monitor directly the H-mode. Applying electrical feed-back using the monitor transducer, both detection and driving mode are stabilized. Therefore, DC drift is suppressed to 9.3% that of a conventional LiTaO₃ gyroscope