全数字开环光纤陀螺调制信号的产生方法  

Method of Producing Modulation Signal in All Digital Open-loop FOG

作　　者：陈宇中[1] 宋章启[1] 阳明晔[1] 胡永明[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：《光电工程》2008年第12期78-81,共4页Opto-Electronic Engineering

摘　　要：开环光纤陀螺在工作时需要对其工作点进行控制,这就要求能够用数字的方法产生一个幅度可调的正弦波调制信号。首先对光纤陀螺调制信号的数学描述进行了分析,在此基础上提出了三种幅度可调调制信号的产生方法,即直接波表法、乘法调幅法、两级波表法,并分析了三种方法各自的优缺点。比较了用不同方法产生调制信号进行工作点控制的实验结果。在大多数情况下,两级波表法是较好的选择,它可在存储容量及计算资源都有限的情况下实现工作点的精确控制。The work point should be controlled when open-loop Fiber Optic Gyroscope （FOG） is working, so a sin wave modulation signal with adjustable amplitude must be produced by digital method. First, mathematic description of FOG＇s modulation signal was analyzed, and then three methods for producing modulation signal with adjustable amplitude were discussed, which are direct wave table method, multiplicative amplitude adjusting method and two-level wave table method. Their advantage and disadvantage were analyzed. Experiment results of work point controlled by using different modulation signal producing method were given. In most cases, two-level wave table method is a good choice for producing modulation sin signal and can realize work point precise control in the condition of both limited storage resource and computing resource.

关 键 词：开环光纤陀螺 调制信号 幅度调节 陀螺仪 

分 类 号：V241.5[航空宇航科学与技术—飞行器设计]