作　　者： (刘洪）; (苏中）;

机构地区： 北京信息科技大学高动态导航技术北京市重点实验室

出　　处： 《导航与控制》 2015年第3期26-30,14,共6页

摘　　要： 旋转抛物面形金属结构作为一种新型固体波动陀螺的振子,利用处于谐振状态下的轴对称谐振壳体中驻波的哥氏效应敏感角运动。谐振子本身的结构特点使其具有抗高过载、高冲击的特性,因而在高动态环境下的中低精度角速率测量场合具有广阔的应用前景。在实际制造过程中.由于旋转抛物面形谐振子的壁厚、密度、弹性模量等结构和材料参数的不均匀会导致其固有频率发生裂解,其值的大小是决定能否产生陀螺效应以及影响陀螺整体性能指标的关键因素。针对上述问题,提出了一种通过去除谐振子边缘质量的方法减小其频率裂解。通过有限元仿真分析及试验测试证明该方法能够有效抑制谐振子的固有频率裂解,使得频率裂解减小到0.2Hz以下。 As the resonator of a novel solid wave gyroscope,PRSR(Paraboloid of Revolution Shape Resonator) utilizes the Coriolis effect of standing wave in the axisymmetric shell to sense the angular motion.The structural characteristics of the PRSR’s self make it have high overload,high shock resistance characteristics,and therefore it has broad application prospects in the low accuracy in the high dynamic angular rate measurement occasions.In the actual manufacturing process,due to the structure of the PRSR’s wall thickness,density,elastic modulus and the inhomogeneity of the material parameters will lead to the natural frequency split,and both a gyroscopic effect appeared or not and the key performance of the gyro are determined by the amount of the spit value.To solve the above problem,a precision balance method is proposed to reduce the natural frequency split via wall-trimming and bottom-trimming.The simulation result of FEM and experiment show that the precision balance method can minimize the natural frequency split less than0.2Hz.

关 键 词： 固体波动陀螺 旋转抛物面形谐振子 频率裂解