DDC112在激光陀螺腔长控制电路中的应用  

Application of DDC112 in cavity length control circuit of laser gyro

作　　者：李广柱[1] 袁保伦[1] 饶谷音[1] 

机构地区：[1]国防科技大学,长沙410073

出　　处：《电光与控制》2008年第2期82-84,共3页Electronics Optics & Control

摘　　要：介绍了DDC112在激光陀螺的腔长控制系统中的应用。由于发现DDC112在进行AD转换时,随着内部开关的切换,会发生输入阻抗变化的效应,若将其直接应用在激光陀螺的腔长控制电路中,会对陀螺的计数产生干扰。为克服这个效应,设计了实用的前置电路。用设计的新电路实现了激光陀螺光电流的直接数字化,满足高精度腔长控制的要求。DDC112 is applied in the cavity length control system of laser gyro. It is found that the input impedance of DDCll2 changes periodically during its AD conversion; and the changing impedance will influence the counting process of laser gyro if it is applied directly. In order to overcome this effect, a preconditioning circuit is introduced. The new circuit directly digitizes the photocurrent of laser gyro successfully, and meets the need of high precision cavity length control system of laser gyro.

关 键 词：激光陀螺 DDCll2 腔长控制 数字技术 

分 类 号：V241.5[航空宇航科学与技术—飞行器设计]