Research of a piezoelectric vibratory gyroscope utilizing the new drive-detection method

本文论述了振动陀螺仪驱动检测方法的等效电路研究及其应用。首先利用几种驱动检测方法推导了弯曲振动杆陀螺仪的等效电路。通过该等效电路澄清了两种方法之间的差异，得到了理想的方法。然后，将该方法应用于利用截面内其他模态对的新型弯曲振动杆陀螺仪。我们已经提出了陀螺仪结构。并对其特性进行了测量。所得结论总结如下：(1)驱动检测方法的等效电路研究期望的方法谐振频率温度变化小，漏电输出产生路径少。该方法为无输入输出静电电容构成。(2)条形陀螺仪的特点这种结构非常简单…而且，谐振频率的调节也很容易。此外，能够相对容易地进行泄漏输出的减小。(3)泄漏输出的等效电路研究给出了引起泄漏输出的几个因素。通过电路定量分析了这些因素对特性的影响。不可能完全失去这些因素的影响。因此，泄漏输出的减少必须依赖于使用所插入的电子电路的信号处理。(4)支座等效电路研究挠曲振动杆不存在共点和不动点。因此，双谐振模式通过支撑线机械耦合，泄漏输出变大。因此，耦合必须小。此外，必须避免支撑线的反谐振。此外，还要求气泡谐振频率不受支撑线的影响而改变。这里展示了这种支撑的设计指南。少

This research is expressing about an equivalent circuit study and its application of the drive-detection method of the vibratory gyroscope. An equivalent circuit was first derived for a flexurally-vibrating bar gyroscope using the several drive-detection methods. The differencesbetween the methods were clarified by this equivalent circuit, and the desirable method was obtained. Next, the method was applied to a new flexurally-vibrating bar gyroscope utilizing the other mode pair within the cross-section. The gyroscope constition was already proposed by us. And, the characteristic was measured. The obtained conclusion is summarized as the following.(1) Equivalent circuit study of drive-detection methodsThe desired method have a small temperature change of the resonant frequency and a small number of producing routes of leakages output. Also, the method is the constitution without the input-output electrostatic capacitance.(2) Characteristic of bar gyroscopeThis constitution is very simp … More le. Also, the adjustment of resonant frequency is easy. Furthermore, the reduction of leakage output is able to be carried out comparatively easily.(3) Equivalent circuit study of leakage outputThe several factors are given as a cause of leakage output. The influence that these give to the characteristic was analyzed quantitatively by the circuit. It is impossible to lose an influence of these factors completely. Accordingly, the reduction of leakage output must depend to a signal processing using the inserted electronic circuit.(4) Equivalent circuit study of supportsA common and immovable point does not exist in the flexually-vibrating bar. Because of this, the double-resonant modes are coupled mechanically by a support wire, and the leakage output become big. Accorgigly, the coupling must be small. Also, anti-resonances of support wire must be avoided. Furthermore, it is demanded that the bouble-resonant frequencies do not change by a support wire. A design guideline of such support is shown here. Less