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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 a vibrator of a new type of solid undulating gyroscope, a rotating paraboloid-shaped metal structure utilizes the Coriolis-sensitive angular motion of standing waves in an axisymmetric resonant housing in a resonant state. The structural characteristics of the resonator itself make it resistant to high overload and high impact, so it has broad application prospects in low-precision angular rate measurement occasions under high dynamic environment. In the actual manufacturing process, due to the non-uniform structure and material parameters such as the wall thickness, density and elastic modulus of the rotating paraboloid-shaped resonator, its natural frequency will be cracked, the value of which depends on the gyroscopic effect and influence Gyro overall performance indicators of the key factors. Aiming at the above problems, a method of reducing the frequency cracking by removing the resonator edge quality is proposed. Finite element simulation analysis and experimental tests show that this method can effectively suppress the natural frequency cracking of the harmonic oscillator and reduce the frequency cracking to below 0.2 Hz.