【作者】 张俊杰；

【导师】 李志全；

【作者基本信息】 燕山大学 ， 检测技术与自动化装置， 2006， 硕士

【摘要】 光纤陀螺仪是一种基于Sagnac效应的角速度传感器。目前,国内光纤陀螺仪研制和制造领域,已经取得了长足的发展,但是和国外相比还有相当的差距。温度影响是高精度光纤陀螺仪在工程应用中必须解决的一个关键问题。本文针对闭环干涉式光纤陀螺仪的温度特性进行了理论分析,提出了一种基于DSP信号处理的温度补偿方案,并进行了相关实验研究。首先,本文系统地介绍了光纤陀螺仪的基本理论,包括光纤陀螺仪的工作原理、分类、性能指标及其计算方法等。并且对闭环干涉式光纤陀螺仪的误差来源进行了深入的研究,对各个部件分别进行了性能分析。其次,本文重点提出了以DSP为信号处理核心的闭环干涉式光纤陀螺仪的温度补偿方案。光纤陀螺仪受温度影响主要表现在光纤环、光源和集成光学器件产生的温度漂移上。论文主要从光纤环和光源两方面进行温度补偿,通过对光纤环温度补偿系统结构的调整,对光源的光波长和光功率分别采取稳定措施,以及先进的控制算法的运用等一系列办法,不仅提高了光纤陀螺仪的精度,而且能够缩短系统的预热时间。最后,本文从考察光纤陀螺仪的系统精度和预热时间两方面出发,进行了实验研究。实验结果验证了温度补偿方案的有效性,其研究结果可为光纤陀螺仪后续的研究提供借鉴和指导作用。更多还原

【Abstract】 Fiber Optic Gyroscope is a kind of angular rate sensor based on Sagnaceffect. In the gyro research and manufacturing field, China has dropped behindsome developed countries as though China has made a progress so far. Thetemperature influence on the optic gyroscope is one of the problems. It presentsthe theoretical analysis of the temperature compensation technology of theclosed-loop IFOG in this paper and a new temperature compensation scheme isdiscussed. Experiment has been performed to verify the scheme.Firstly, the basic theory of the optic gyroscope is systemically presented inthis paper, including the principle, the classification and the performanceevaluation of the optic gyroscope. A further study is carried out to find out theerror source of the closed-loop IFOG and the thermal performance of each partis also analyzed.Secondly, this paper put a high premium on the scheme of the temperaturecompensation for the closed-loop IFOG that based on DSP. The temperaturedrift induced by the fiber coil、light source and integrated optic chip which areeasily influenced by temperature is the key element of the temperature error ofthe IFOG. In this paper, the temperature compensation focus on the fiber coiland light source. Not only the precision but also the warm-up time of thesystem can be improved by taking such measures as the modification of thefiber coil temperature measuring structure, stabilizing the light power and thewavelength of the light source respectively, applying a series of advancedcontrol method.Finally, experiment is performed to test the IFOG after temperaturecompensation. The result shows that the temperature compensation scheme iseffective to improve the precision and warm-up time of the whole system. Theconclusion of this paper can be used as the reference to the continued research.更多还原