A highly accurate positioning and orientation system based on the usage of four-cluster fibre optic gyros

作者：Zhang Xiaoyue^*; Lin Zhili; Zhang Chunxi

来源：Measurement Science and Technology, 2013, 24(4): 045004.

DOI：10.1088/0957-0233/24/4/045004

• ground-based missile
• mobile launching
• fibre optic gyro (FOG)
• high-precision north-seeking
• online calibration

A highly accurate positioning and orientation technique based on four-cluster fibre optic gyros (FOGs) is presented. The four-cluster FOG inertial measurement unit (IMU) comprises three low-precision FOGs, one static high-precision FOG and three accelerometers. To realize high-precision positioning and orientation, the static alignment (north-seeking) before vehicle manoeuvre was divided into a low-precision self-alignment phase and a high-precision north-seeking (online calibration) phase. The high-precision FOG measurement information was introduced to obtain high-precision azimuth alignment (north-seeking) result and achieve online calibration of the low-precision three-cluster FOG. The results of semi-physical simulation were presented to validate the availability and utility of the highly accurate positioning and orientation technique based on the four-cluster FOGs.

• 出版日期2013-4
• 单位北京航空航天大学