激光陀螺抖动偏频电路的设计与实现

The Design and Implement of Laser Gyro Dither Bias Circuit

目前消除激光陀螺闭锁误差常用的方法是采用机械抖动偏频及向抖动驱动信号中注入随机噪声。根据某型激光捷联惯导系统所选用的激光陀螺的特性,采用微控制器、锁相环及D/A转换器等器件设计了激光陀螺抖动及加噪电路。该电路具有抖动起振快、加噪简单有效、工作可靠性高等特点,并具有自检测功能。从设计的激光捷联惯导系统实际运行看,该电路能很好地满足系统功能及性能要求。

The common methods of removing the lock-in error in laser gyro are mechanism dither and adding noise in driver signal. According to the characteristic of the laser gyro which we has been used in the inertial navigation system, we have designed a good dither and noise add controller module mainly using MCU, PLL and D/A convert .The module has some feature such as fast start dither ,easily and efficiently noise adding, high stability, also has a serf-test function. Inspecting the performance and function from the inertial navigation system, the module is efficiently.