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Ture north plays an important role in many military and civilian applications. North-finding systems (NFSs) based on Micro-Electro-Mechanical system (MEMS) have received much attention in recent years because of its small size, low power consumption, batch production. In this paper, a NFS with the size 48.6 mm × 48.6 mm × 28.0 mm and the weight 105g is reported. The NFS is based on a honeycomb disk resonator gyroscope (HDRG), without a rate table. To suppress the zero rate output (ZRO) drift, the method of mode reversal is applied. A month-long indoor ZRO experiment was conducted, and the HDRG operated with mode reversal can reach a 0.0193°/h bias instability. An outdoor north-finding experiment is also implemented (Temperatures throughout the day is 5 ℃-16 ℃). The result shows that the root mean square (RMS) of the azimuth of the NFS can reach 0.44° around east and west direction (±5°) for 3 min at 28.2° latitude.

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High Accuracy MEMS Gyrocompass with Honeycomb Disk Resonator Gyroscope

  • 会议论文

  • 发表日期：

    2025年

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  • Quanzhu Meng,
  • Shuiyang Liang,
  • Qinsong Li,
  • Tongqiao Miao,
  • Dingbang Xiao,
  • Xuezhong Wu

摘要

Ture north plays an important role in many military and civilian applications. North-finding systems (NFSs) based on Micro-Electro-Mechanical system (MEMS) have received much attention in recent years because of its small size, low power consumption, batch production. In this paper, a NFS with the size 48.6 mm × 48.6 mm × 28.0 mm and the weight 105g is reported. The NFS is based on a honeycomb disk resonator gyroscope (HDRG), without a rate table. To suppress the zero rate output (ZRO) drift, the method of mode reversal is applied. A month-long indoor ZRO experiment was conducted, and the HDRG operated with mode reversal can reach a 0.0193°/h bias instability. An outdoor north-finding experiment is also implemented (Temperatures throughout the day is 5 ℃-16 ℃). The result shows that the root mean square (RMS) of the azimuth of the NFS can reach 0.44° around east and west direction (±5°) for 3 min at 28.2° latitude.