集成化光纤陀螺相位调制器研究
Research on Integrated Fiber Optic Gyroscope Phase Modulator
焦扬 1王凌宇 2孙道鑫 2许文渊 3冯丽爽 2于涵也4
作者信息
- 1. 北京航空航天大学精密光机电一体化技术教育部重点实验室,北京 100191;北京控制工程研究所,北京 100190
- 2. 北京航空航天大学精密光机电一体化技术教育部重点实验室,北京 100191
- 3. 重庆自行者科技有限公司,重庆 402247
- 4. 航天科工空间工程发展有限公司,北京 100854
- 折叠
摘要
针对低成本集成化光纤陀螺研发需求,研制了一款非线性系数小、性能稳定的PZT光纤相位调制器.提出了一种新的具有支撑支架的PZT光纤相位调制器结构设计方案,完成了调制器的结构参数设计和频率特性分析,实现了PZT光纤相位调制器的性能优化.同时针对PZT光纤相位调制器存在的非线性误差大问题,提出了一种基于双闭环系统的相位迟滞非线性反馈补偿方案,完成了基于SOPC的解调方案设计,对压电材料固有的迟滞非线性误差进行补偿,从而减小陀螺的零偏,提升零偏稳定性.搭建了基于集成光子芯片的集成化光纤陀螺系统,实验结果表明:陀螺10s零漂为0.69(°)/h,该技术有效补偿了迟滞非线性误差对陀螺精度的影响.
Abstract
In order to meet the R&D needs of low-cost integrated fiber gyroscope,a PZT fiber phase modulator with small nonlinearity coefficient and stable performance is developed.A new structural design scheme of PZT fiber phase mod-ulator with support bracket is proposed,and the structural parameter design and frequency characteristics analysis of the modulator are completed,and the performance optimization of PZT fiber phase modulator is realized.At the same time,in order to solve the problem of large nonlinear error of PZT fiber phase modulator,a phase hysteresis nonlinear feedback com-pensation scheme based on double closed-loop system is proposed,and the design of SOPC-based demodulation scheme is completed to compensate for the inherent hysteresis nonlinearity error of piezoelectric materials,so as to reduce the bias of the gyroscope and improve the bias stability.An integrated fiber optic gyroscope system based on integrated photonic chips is built,and the experimental results show that the zero drift of the gyroscope is 0.69(°)/h for 10 s,and the technology ef-fectively compensates for the influence of hysteresis nonlinearity error on the accuracy of the gyroscope.
关键词
集成化光纤陀螺/PZT光纤相位调制器/迟滞非线性误差/迟滞非线性反馈补偿Key words
integrated fiber optic gyroscope/PZT fiber phase modulator/hysteresis nonlinear error/hysteresis non-linear feedback compensation引用本文复制引用
出版年
2024
NETL
NSTL
万方数据