光源共享3+1S型光纤陀螺在轨故障诊断与延寿设计  

On orbit fault diagnosis and life extension design of 3+1S fiber optic gyroscope with shared light source

作　　者：张金保[1] 林松[1] 潘雄[2] 李勇[1] 孙丽[1] ZHANG Jinbao;LIN Song;PAN Xiong;LI Yong;SUN Li(Beijing Institute of Control Engineering,Beijing 100190,China;Beijing University of Aeronautics and Astronautics,Beijing 100083,China)

机构地区：[1]北京控制工程研究所,北京100190 [2]北京航空航天大学,北京100083

出　　处：《中国惯性技术学报》2020年第4期556-560,共5页Journal of Chinese Inertial Technology

基　　金：装备发展预先研究项目(41417060102)。

摘　　要：针对空间小卫星惯性应用领域的低功耗、低重量特点,设计出一款双光源四轴一体化小型化3+1S光纤陀螺方案。通过四轴共享光源降低整机功耗及重量,利用3+1S构型消除三个相互垂直方向的测试单点,使用双光源互为冷备份来消除光源单点,在双光源功率均下降的情况下,提出双光源共同工作的延寿策略。给出了光纤陀螺在轨的性能自检、光源故障诊断和处理、单轴故障诊断和处理、光功率下降的处理策略、以及整机延寿方法。设计了光功率检测电路,实现在线监视光功率的变化,为故障诊断和处理方案提供依据。在双光源功率均下降的情况下,通过双光源共同工作的方式,使陀螺的输出精度恢复到初始设计值,该延寿方案可以使光纤陀螺的在轨寿命延长3~5年。According to the characteristics of low power consumption and low weight in the field of small space satellite inertial application,a scheme of 3+1S fiber optic gyroscope with dual light source and four axis integration is designed.In this scheme,the four-axis shared light source is used to reduce the power consumption and weight of the whole machine.The 3+1S configuration is used to eliminate three mutually perpendicular test points,and the dual light sources are used as cold backup for each other to eliminate the single point of the light source.When the power of the two light sources decreases,the life extension strategy of the dual light sources working together is proposed.In the proposed scheme,the on orbit performance self-test,light source fault diagnosis and treatment,single axis fault diagnosis and treatment,treatment strategy of optical power degradation and life extension technology of fog are given.The optical power detection circuit is designed to monitor the change of optical power on-line,which provides the basis for fault diagnosis and treatment scheme.When the power of the two light sources is reduced,the output precision of the gyroscope can be restored to the original design value by the way of working together with the two light sources.The life extension scheme can prolong the on orbit life of fog by 3~5 years.

关 键 词：光纤陀螺 光源共享 故障诊断 寿命延长 

分 类 号：V448.224[航空宇航科学与技术—飞行器设计]