吴燕雄, 滕云田, 吴琼, 徐行, 张兵. 船载绝对重力仪测量系统的误差修正模型及不确定度分析[J]. 武汉大学学报 ( 信息科学版), 2022, 47(4): 492-500. DOI: 10.13203/j.whugis20190412
引用本文: 吴燕雄, 滕云田, 吴琼, 徐行, 张兵. 船载绝对重力仪测量系统的误差修正模型及不确定度分析[J]. 武汉大学学报 ( 信息科学版), 2022, 47(4): 492-500. DOI: 10.13203/j.whugis20190412
WU Yanxiong, TENG Yuntian, WU Qiong, XU Xing, ZHANG Bing. Error Correction Model and Uncertainty Analysis of the Shipborne Absolute Gravity Measurement System[J]. Geomatics and Information Science of Wuhan University, 2022, 47(4): 492-500. DOI: 10.13203/j.whugis20190412
Citation: WU Yanxiong, TENG Yuntian, WU Qiong, XU Xing, ZHANG Bing. Error Correction Model and Uncertainty Analysis of the Shipborne Absolute Gravity Measurement System[J]. Geomatics and Information Science of Wuhan University, 2022, 47(4): 492-500. DOI: 10.13203/j.whugis20190412

船载绝对重力仪测量系统的误差修正模型及不确定度分析

Error Correction Model and Uncertainty Analysis of the Shipborne Absolute Gravity Measurement System

  • 摘要: 目前的激光干涉绝对重力仪均在静态环境下工作,而动态环境下的绝对重力测量是技术发展的热点之一。船载绝对重力测量能够很好地克服海洋相对重力测量仪器的零漂、标定、误差累积等问题,提高作业效率和可靠性。基于激光干涉绝对重力仪工作原理设计了一个船载绝对重力仪测量系统,该系统由绝对重力测量系统、陀螺仪稳定平台、力平衡式加速度计和GPS(global positioning system)组成。通过对影响船载绝对重力测量系统的垂直波动、纵摇横摇、水平波动以及厄特弗斯效应等4类干扰源进行分析,给出了该系统正常工作的动态限制条件、误差修正方法和修正精度,验证了在现有技术条件下,船载绝对重力仪测量系统的测量精度可以优于±1.1 mGal,为进一步的船载绝对重力测量实验提供理论支撑。

     

    Abstract:
      Objectives  The laser interference absolute gravimeters can only work in static conditions until now, and absolute gravity measurement in a dynamic environment is one of the hotspots for future technological development. The shipboard absolute gravity measurement can overcome the problems of zero drift, calibration, and error accumulation of the marine relative gravity instruments, and improve their efficiency and reliability.
      Methods  We present an absolute gravity measurement system from a ship, which consisted of an absolute gravity instrument, a gyro-stabilized platform, a force balance accelerometer and GPS (global positioning system).Firstly, Four types of interference sources that the vertical fluctuation, the pitch and roll, the horizontal fluctuation and the Eötvös effect, which cause the measurement errors of the shipboard gravity measurement system, were analyzed. Then, the limits of dynamic measurement, the error correction methods and their accuracy were given.
      Results and Conclusions  Under current technical conditions, the precision of the shipboard absolute gravimeter measurement system can be better than ±1.1 mGal. Therefore it provides theoretical support for further shipborne absolute gravity measurement experiments.

     

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