1. Hubei Instiute of Measurement and Testing, Wuhan, Hubei 430071, China
2. Key Laboratory of Gravity Navigation of Ministry of Education, School of Physics, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China
3. Wuhan National Laboratory for Optoelectronics,Huazhong University of Science and Technology, Wuhan, Hubei 430074, China
Abstract：Based on the principle of torsion balance measuring gravity gradient , a torsion balance gravity gradiometer was designed, which consists of a torsion balance system, an angle measurement system, an amplitude attenuation system, a turntable system, a vacuum container system. Considering the stable time of torsion balance suspension system was too long, which had great impacted the efficiency of the gravity gradient measurement, an amplitude attenuation system was designed in combination with PID control technology.Simulation results show that, the curvature and horizontal gravity gradient could be measured, the accuracy was as high as 0.5 E(1E=1×10-9m/s2), and the limit efficiency of measuring a group of gravity gradients was better than an hour.
［1］蔡体菁, 周百令. 重力梯度仪的现状和前景［J］. 中国惯性技术学报, 1999, 7(1): 39-42.
［2］Szabo Z. The history of the 125 year old Eotvos torsion Balance［J］. Acta Geod Geophys, 2016, 51:273–293 .
［3］Bod L, Fischbach E, Marx G, et al. One Hundred years of the Eotvos Experiment［J］. Acta Physica Hungarica, 1991, 69: 335-355.
［4］Hansen R. The gravity gradiometer basic concepts and tradeoffs［J］. The Leading Edge, 1999, 18(4):478-480.
［5］Edwin H, Leeuwen V. BHP develops airborne gravity gradiometer for mineral exploration ［J］. The Leading Edge, 2000, 19(12):1296-1297.
［6］Pawlowski B. Gravity gradiometer in resource exploration［J］.The Leading Edge, 2012,17 (1):51-52.
［7］ Huffel S, Vandewalle J. The Total Least Squares Problem: Computational Aspects and Analysis［M］. Philadel Phi:Society of Industrial and Applied Mathematics,1991.
［8］Golub G H, Hoffman A, Stewart G W. A generalization of the Eckart-Young-Mirsky matrix approximation theorem ［J］. Linear Algebra & Its Applications, 1987, 88-89(3):317-327.
［9］Shaw H, Lancasterjones E. Application of the Etvs Torsion Balance to the Investigation of Local Gravitational Fields［J］. Quality Assurance in Education, 1922, 22(1):88-104.
2018, Vol. 39 
