论文部分内容阅读
椭球转子高速旋转后非球度较圆球转子小,因此干扰力矩小,能进一步提高陀螺仪精度。但是,静态下椭球转子的质量不平衡测量误差受限于本身的非球度,不能满足工程应用要求。已有的动态测试法可以对转子轴向质量不平衡引起的漂移系数进行标定,但其使用的高精度双轴伺服转台成本高,结构复杂。该文在静基座上利用角度读取装置记录椭球转子漂移轨迹,利用质量不平衡激励的漂移轨迹特征辨识出椭球转子轴向质量不平衡。对陀螺仪的试验结果表明:该方法与伺服法测得的结果误差小于6%。此方法原理、结构简单,具有快速、低成本的优势,能很好地满足工程应用需求。
As the ellipsoidal rotor rotates at a high speed, the asphericity is smaller than that of the ball rotor, so the interference torque is small, which can further improve the gyro accuracy. However, the measurement error of mass imbalance in the static lower ellipsoidal rotor is limited by its own asphericity and can not meet the engineering application requirements. The existing dynamic test method can calibrate the drift coefficient caused by unbalanced axial mass of the rotor. However, the high precision dual-axis servo rotary table used by the utility model has high cost and complex structure. In this paper, the angular drift of the ellipsoidal rotor is recorded on the static base using the angle reading device, and the axial mass imbalance of the ellipsoidal rotor is identified by the drift trajectory characteristics of mass imbalance excitation. The experimental results on the gyroscope show that the error between this method and the servo method is less than 6%. The principle of the method, the structure is simple, has the advantages of fast and low cost, and can well meet the engineering application requirements.