无锚杆金属固态振动陀螺振子结构优化与特性仿真分析

Structural Optimization and Characteristic Simulation Analysis of Anchorless Metal Solid-state Vibration Gyro Oscillator

摘要:

针对Ψ型陀螺振子加工难度大等问题,改进了一种无锚杆金属振子。运用有限元分析软件,对振子的振动特性进行了深入分析,获得其各阶振型和固有频率；对振子进行过载特性仿真分析,得出振子在高过载条件下的应力和位移表现；并进一步采用多物理场分析振子的品质因数。结果表明,该金属振子直径为15mm,固有频率为12509Hz,模态隔离度大于3291Hz,能够承受不小于3.8×10⁴g的过载冲击,同时品质因数达到8.7×10⁴。通过实物测试以及与Ψ型振子对比,验证了优化的合理性、有效性和准确性。

Abstract:

In response to the challenges posed by a Ψ-type gyroscope oscillator, an anchor-free metal oscillator was optimized and improved. A finite element simulation was used to analyze the vibration characteristics of the oscillator in depth, and the oscillator modes and natural frequencies of each order were obtained. The overload characteristics of the oscillator were simulated and analyzed, and the stress and displacement performances of the oscillator under high overload conditions were obtained. The quality factor of the oscillator was further analyzed using a multi-physical field investigation. The results showed that the metal oscillator had a diameter of 15mm, natural frequency of 12509Hz, and modal isolation of more than 3291Hz. It could withstand an overload impact of no less than 3.8×10⁴g, while the quality factor reached 8.7×10⁴. The rationality, effectiveness, and accuracy of the optimization were verified by physical tests and a comparison with a Ψ-type oscillator.