基于模糊PI控制的激光器频率跟踪锁定技术

Laser frequency tracking and locking technology based on fuzzy PI control

针对谐振式光纤陀螺用光纤激光器频率跟踪锁定应用需求,提出一种基于模糊PI控制的激光器频率跟踪锁定方法。首先对频率跟踪锁定控制总体方案进行了叙述,综合利用模糊控制的快响应和PI控制的高精度技术优点;其次,重点进行了模糊控制器的设计和仿真,阐述了模糊控制流程和方法,并设计了模糊控制器的FPGA程序代码;最后,搭建了基于模糊PI控制的激光器频率跟踪锁定实验测试系统,实现了光纤激光器中心频率对光纤谐振腔谐振频率的快速跟踪锁定控制,为谐振式光纤陀螺应用奠定了技术基础。

A method of frequency tracking and locking based on fuzzy PI control is proposed for the application of frequency tracking and locking of fiber laser used in Resonator fiber optic gyro(RFOG).Firstly,the overall scheme of frequency tracking and locking control is described,which makes use of the fast response of fuzzy control and the high precision technology of PI control.Secondly,the design and simulation of fuzzy controller are emphasized,the flow and method of fuzzy control are described,and the field programmable logic gate array(FPGA)program code of fuzzy controller is designed.Finally,the frequency tracking lock of laser based on fuzzy PI control is built.The fast tracking and locking control of the central frequency of the fiber laser to the resonant frequency of the fiber resonator is realized by the fixed test system,which lays a technical foundation for the application of the RFOG.