光纤陀螺寻北仪样机设计及系统测试  

Prototype Design and System Test of Fiber Optic Gyroscope North-Finder

作　　者：张志君[1] 孙霁宇[2] 武克用[3] 

机构地区：[1]吉林大学机械科学与工程学院,吉林长春130022 [2]吉林大学生物与农业工程学院,吉林长春130022 [3]中国科学院长春光学精密机械与物理研究所,吉林长春130031

出　　处：《测试技术学报》2007年第2期130-132,共3页Journal of Test and Measurement Technology

摘　　要：提出了一种基于光纤陀螺的动态寻北方案,运用光纤陀螺测量地球角速度的北向分量.通过对光纤陀螺输出的正弦信号的采样和处理,即可得到地球表面某参考点的方位.描述了光纤陀螺寻北仪的工作原理及系统样机组成,详细分析了转台台面倾斜误差对寻北精度的影响,采用加速度计对寻北精度进行补偿提高.采用多周期多位置采样技术,有效地抑制了光纤陀螺的测量噪声.测试结果表明,在3min之内可获得5′的真北角精度.A dynamic north-finder scheme based on the fiber optic gyroscope （FOG） is presented to measure the north component of the angular velocity of earth rotation. The sine output signal of the FOG is sampled and processed to calculate the direction of surveyed point on the surface of earth. The principle and the prototype of the fiber optic gyroscope north-finder is described, the deviation influence caused by the basemen tilt on the north angle precision is analyzed particularly, the accelerometer is used to compensate and improve the accuracy of the north-finder. The multi-period and multi-position sampiing techniques are adopted to effectively restrain the measurement noise of FOG. The test results show that the true north angle accuracies of 5＇ can be obtained within not more than three minutes.

关 键 词：光纤陀螺 寻北仪 基座倾斜 加速度计 

分 类 号：V241.5[航空宇航科学与技术—飞行器设计]