高精度差动放大器AD620构成的四频差动激光陀螺数字稳频系统  

A Digital Frequency Stabilizing System Consisting of High Precision Differential Amplifier AD620 for Four Frequency Differential Laser Gyro

作　　者：杨建强[1] 廖丹[1] 

机构地区：[1]国防科学技术大学光电科学与工程学院,长沙410073

出　　处：《电光与控制》2009年第7期62-64,共3页Electronics Optics & Control

摘　　要：为提高光强差稳频精度,采用高精度差动放大器AD620放大微弱光强差信号,利用微控制器TMS320LF 2407DSP构建了一套实用四频差动激光陀螺的稳频系统。系统核心采用PID算法,包括确定工作点、扫模、跳模处理等程序。经反复试验,AD620差分增益G=166时控制精度最佳。测试结果表明,该系统的稳频精度达10^(-9)量级,完全能满足应用要求。For improving the precision of light intensity difference frequency stabilizing, a set of frequency stabilizing system for four frequency differential laser gyro was designed based on the mieroeontroller TMS320LF2407DSP, in which a high precision differential amplifier AD620 was adopted to amplify week light intensity difference signal. The PID algorithm was adopted in software, including operating point con- firming, mode searching and mode jumping program. Experiments showed that the eontroUing precision was best when the differential gain of the AD620 G = 166. The results indicated that the frequency stabilizing precision of the system can reach the magnitude of 10 -9, which cna meet the need of application.

关 键 词：激光陀螺 AD620 光强差稳频 PID算法 

分 类 号：V241.5[航空宇航科学与技术—飞行器设计]