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温度变化导致的模态参数波动被认为是引起微机械振动陀螺零偏漂移的主要因素,但目前关于模态参数对陀螺零偏影响机制的研究很少。针对这个问题,结合微机械陀螺的动力学模型及工作原理,理论上推导了零偏与主要模态参数之间的关系,并通过仿真进行了详细的定量分析。分析结果表明,敏感模态品质因数变化是引起零偏漂移的最显著因素,同时,总的陀螺漂移与敏感模态品质因数的取值成反比,与驱动模态谐振频率和敏感模态谐振频率的取值成正比。这些特性和结论可为陀螺的结构优化和误差补偿提供理论指导。
The fluctuation of the modal parameters caused by the temperature change is considered as the main factor causing the zero offset drift of the micromechanical vibrating gyroscope. However, little research has been done on the influence of the modal parameters on the gyro zero offset. In response to this problem, the relationship between zero-bias and the main modal parameters is theoretically derived based on the dynamics model and working principle of the micro-mechanical gyroscope. The detailed quantitative analysis is carried out by simulation. The results show that the change of the sensitive modal quality factor is the most significant factor that causes the drift of zero offset. Meanwhile, the total gyro drift is inversely proportional to the value of the sensitive modal quality factor, which is in agreement with the driving mode resonance frequency and the sensitive mode resonance frequency The value is proportional to. These characteristics and conclusions can provide theoretical guidance for structural optimization and error compensation of the gyroscope.