摘要
光纤陀螺(FOG)寻北仪是利用FOG在相对地球静止时感测到的地球自转角速率在光轴上的分量特性而设计的寻北系统。固定陀螺的基座不水平时,对寻北精度会产生较大的影响。为了检测基座平面的姿态角,并对陀螺的输出值进行补偿,研制了高精度的双轴倾角传感器。该倾角传感器采用双轴石英挠性加速度计作为检测元件,通过采样加速度计在相差180°的2个方向上的输出值,精确地解算出基座平面的姿态角,并消除了加速度计偏值的影响。系统简单,容易实现,且达到了较高的测角精度。
Fiber-optic gyroscope （FOG） north seeker is a determining north system that utilizes the horizontal components of the earth rotation rate sensed by FOG when FOG is at rest relative to the earth. The angles between the base and the horizontal plate have great effect on the orientation accuracy. In order to detect the attitude angles （ roll angle and pitch angle） of the carrier at the same time and compensate the outputs of the FOG, a high-precise angle sensor is developed,which adopts double axis quartz flexible accelerometer as detecting sensor. By making use of the outputs of the accelerometer at two directions with a phase difference of 180° ,the tilt angles between the base and the horizontal plate can be accurately calculated and the constant offsets of the accelerometer are eliminated. The tilt angle sensor is easy to implement and has high measuring accuracy.
出处
《传感器与微系统》
CSCD
北大核心
2009年第12期86-88,92,共4页
Transducer and Microsystem Technologies
