RAPINS/GPS/L/重力仪海洋重力测量系统仿真

Research and simulation on marine gravity measuring system of RAPINS/GPS/L/Gravimeter

为了降低海洋重力测量的成本,提出将重力敏感器放置在速率方位惯性平台上,加上GPS接收机和计程仪,从而构成一个集导航与动态重力测量功能为一体的组合系统.对RAPINS/GPS/L/重力仪海洋重力异常测量系统进行了研究,建立了组合系统的工作模式,分析了该系统在海洋重力测量中的误差,并且进行了计算机仿真.仿真结果表明,由中低精度的惯性元件组成的RAPINS/GPS/L/重力仪组合系统具有很高的导航精度和较小的平台角误差,可以保持重力敏感器的垂直指向,并能精确计算厄特弗斯效应,具有较高的重力异常测量精度,能够满足海洋重力测量要求.

To lower the cost of marine gravity measuring,an exact dynamic gravity measuring and integrated navigation system is introduced. It consists of a gravity sensor placed on a rate azimuth inertial platform,a GPS RAPINS /GPS /L /gravimeter receiver and a log. Some research of RAPINS / GPS /L /gravimeter marine gravity anomaly measuring system was carried out. The working mode1 of the integrated system is established,the error caused by this system in marine gravity anomaly measuring is analyzed,and the computer simulation is performed. The simulation results show that the integrated system of RAPINS /GPS /L /gravimeter which is composed of moderately precise accelerometers and gyroscopes has very high navigation accuracy and small platform angle error,which can keep the gravity sensor vertical and calculate the Etvs effect. The system has high precision of dynamic gravity anomaly measuring and can meet the measuring demand of marine gravity.