激光陀螺抖动控制电路高精度数字化设计

Design of High Precision Digital Dither Control Circuit on Laser Gyro

摘要:

激光陀螺仪由于存在闭锁效应需要外加抖动偏频来消除;以往的模拟抖动控制电路存在体积大,难以进行精确控制等问题;针对这些问题,设计了一种基于DSP的数字抖动偏频系统,通过DSP对抖动电压进行精确控制,并注入一种参数可调的锯齿波噪声来消除激光陀螺的动态锁区;经过实验表明,抖动偏频控制系统工作稳定,控制精确,噪声注入效果良好;激光陀螺仪静态测试结果表明,在所设计的抖动偏频系统控制下,激光陀螺测量精度高。

Abstract:

The ring laser gyro need to add a dither bias to reduce the lock-in effect. Previous analog dither control circuit is very big and difficult to accurately control.In order to solve these problems, this paper designs a digital dither control circuit based on DSP.through the accurate control to dither voltage on DSP,and put farword a new sawtooth noise which parameters can be adjusted.The experimental results shows that, the digital dither control circuit stability,control precision,noise injection effect is good. The laser gyroscope static test results show that the laser gyro had a higher measuring accuracy by the design system in this paper.