基于超快激光技术的半球谐振陀螺点式修调方法  

Point-trimming method of hemispherical resonator gyroscope based on ultrafast laser technology

作　　者：赵小明 于得川[2] 姜澜 赵丙权[2] 胡洁[3] ZHAO Xiaoming;YU Dechuan;JIANG Lan;ZHAO Bingquan;HU Jie(Laboratory of Science and Technology on Marine Navigation and Control of China State Shipbuilding Corporation,Tianjin 300131,China;Tianjin Navigation Instrument Research Institute,Tianjin 300131,China;Beijing Institute of Technology,Beijing 100081,China)

机构地区：[1]中船集团航海保障技术实验室,天津300131 [2]天津航海仪器研究所,天津300131 [3]北京理工大学,北京100081

出　　处：《中国惯性技术学报》2019年第6期782-786,共5页Journal of Chinese Inertial Technology

基　　金：中船重工科技创新与研发项目(201810K);装备预先研究项目(414170100602)

摘　　要：针对石英半球谐振陀螺中谐振子的频率裂解修调难题,提出基于超快激光技术的点式去重修调方法。首先,分析了频率裂解与四次谐波不平衡质量的对应关系,根据傅里叶级数展开原理以及谐波函数叠加原理,推导了点式去重的修调算法。然后,通过仿真验证了修调效果,并总结出均布对称修调的最优方案。最后采用飞秒激光时空整形加工新方法,进行了石英半球谐振子的修调实验。实验结果表明,所提出的方法可以使频率裂解修调至8 mHz左右,实现了0.5 mHz的修调分辨率。For the challenge of frequency tuning of the hemispherical resonator, a tuning method of point-trimming based on ultrafast laser technology is proposed. Firstly, the relationship between frequency splitting and fourth-harmonic imbalance mass is analyzed, and the point-trimming algorithm is derived based on Fourier series expansion principle and harmonic function superposition principle. Then the tuning effect is verified by simulation, and the optimal solution of uniform tuning is summarized. Finally, a new method of femtosecond laser space-time shaping is used to conduct the tuning experiment of quartz hemispherical resonator. Experiment results show that, by the proposed method, the frequency split is trimmed to 8 mHz, and tuning distinguishability of 0.5 mHz is achieved.

关 键 词：半球谐振陀螺 谐波缺陷 频率裂解 超快激光 

分 类 号：U666.1[交通运输工程—船舶及航道工程]