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

本研究主要是针对振动式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出弯曲振动杆陀螺仪的等效电路。通过该等效电路，阐明了这两种方法之间的差异，从而得到了理想的方法.其次，将该方法应用于一种新型的利用横截面内另一模态对的弯振杆陀螺。陀螺仪的结构已经由我们提出。并对该特性进行了测量。所得结论总结如下。(1)驱动-检测方法的等效电路研究所要求的方法谐振频率的温度变化小，漏电流输出的产生途径少。而且，该方法是没有输入-输出静电电容的构造。(2)杆式陀螺仪的特点 关于我们 乐此外，谐振频率的调整也很容易。此外，泄漏输出的减少能够相对容易地进行。(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。完全失去这些因素的影响是不可能的。因此，泄漏输出的减少必须依赖于使用插入的电子电路的信号处理。(4)支承的等效电路研究弯曲振动杆不存在公共点和固定点。因此，双谐振模式通过支撑线机械耦合，并且泄漏输出变大。因此，耦合必须很小。此外，必须避免支撑线的反共振。此外，要求双谐振频率不因支撑线而改变。这种支持的设计准则在这里显示。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