中文摘要：

利用高精度捷联式惯性测量设备开展测定重力场的初步静态试验,并对静态惯性重力测量影响因素作初步探讨。静态测试表明,基于试验采用IMU内置的石英挠性加速度计,在稳定的观测环境下通过30s的滑动平均滤波可以消除高频噪声,得到标准差约为1.5mGal的重力观测值,但仪器自身的不稳定性和环境变化引起的漂移会使重力观测值呈线性增大的趋势。针对该变化,通过回归分析进行拟合,并结合初始重力已知点上观测得到的初始偏移量,在车载试验中对零速修正点上的静态重力测量误差进行补偿,使大多数点上的重力观测精度由12～20mGal提升至优于2mGal。

英文摘要：

With data obtained from a high precision strapdown inertial measure unit, in this research, static experiments are carried out for the land based inertial gravimetry, initially examining the influ- ence factors for static inertial gravimetry. Results from our static experiments show that with a mov- ing average filter, most high frequency noise from the quartz flexible accelerometers is mitigated, and the corresponding standard deviation of gravity observation that derived from the test IMU is achieved at about 1.5 regal with 30 s averaging. However, due to instrument instability and observation envi- ronment, an upward temporal trend in the observed gravity value can still be noticed. By modeling the temporal trend with regression analysis and detecting the initial unknown IMU observation bias from the beginning known gravity point, the error of observed gravity value can be calculated and compen- sated. Using this method, in our vehicle-based experiment the observation precision at most ZUPT points is successfully improved from 12-20 mGal to 2 mGal.