軸對稱殼式振動陀螺儀之研究

• Main Author: 徐玉紋
• Other Authors: 周元昉
• Format: Others
• Language: zh-TW
• Published: 1996
• Online Access: http://ndltd.ncl.edu.tw/handle/71334237477287206943

碩士 === 國立臺灣大學 === 機械工程學研究所 === 84 === 　　Between all kinds of micromachined vibratory gyroscopes, the performance of the asymmetric vibrating-shell is the best. So, in this article, we focus our attention to this kind of gyroscopes that are fixed at one end, and free at the other end. There are two methods for this kind of gyroscopes to measure the rotation rate. One is to detect the relative procession rate of the free vibration pattern which is proportional to the angular rate. The other method is to excited the shell radially at a fixed point, then to measure the amplitude of at previously nodes which is proportional to the angular rate, too. In the second method, the excitation is set at a frequency equal to that of a natural frequency of a non-rotating shell. The range of the measured rotation rate using the first method is lager than the second method. 　　It is shown in this article that, with both of the two methods, the asymmetric vibrating-shell gyroscopes have no cross sensitivity and translation sensitivity. Besides, they are also not sensitive to the environmental force. In the end of this article, we design a micromachined HRG for observing the performance of this kind of gyroscopes.