金属筒形谐振陀螺的频率修调技术研究

旋转对称结构的谐振陀螺与传统的陀螺相比,具有高寿命、高稳定性、结构简单等诸多优点,然而该种陀螺在加工制造过程中产生的各种误差以及密度应力不均等缺陷,使得谐振子产生频率裂解,严重影响了陀螺性能。国内外对于频率裂解消除的技术已有一定研究,但缺乏系统化的算法指导修调过程。针对一种金属筒形谐振陀螺,推导了一套系统直观、便于指导修调过程的频率修调算法,并通过仿真验证了该算法的实用性。最后,搭建了一套基于电磁激励、声波检测的频率修调系统,按照修调算法进行了修调实验,成功将谐振子频率裂解修调至0.04Hz。

Research on the Frequency Tuning Technology of Metal Cylindrical Resonator Gyroscope

Resonator gyroscopes with rotational symmetry structure have many advantages such as long life time, high stability and simple structure compared with traditional gyroscopes. However, the manufacturing process of resonators creates random minute mass and stiffness asymmetries that cause frequency split, thereby degrading the sensor performance seriously. Though the frequency tuning technology has been studied at home and abroad, there is still a lack of systematic algorithm to guide the tuning process. In this paper, for a kind of metal cylindrical resonator, a set of frequency tuning algorithm is deduced which is intuitionistic and easy to guide the adjustment process. And the practicability of the algorithm is verified by simulation. Finally, a set of frequency tuning system based on electromagnetic excitation and sound wave detection is constructed. The tuning experiment is carried out according to the tuning algorithm, and the frequency split is modified to 0.04Hz.