Results 21 to 30 of about 977 (177)

Cook Ice Shelf and Ninnis Glacier Tongue Bathymetry From Inversion of Operation Ice Bridge Airborne Gravity Data

Geophysical Research Letters, Volume 50, Issue 11, 16 June 2023., 2023
Abstract The seafloor depths under the Cook Ice Shelf and Ninnis Glacier Tongue have not been directly measured, despite their importance for understanding ocean circulation and ice shelf change. We model the bathymetry underneath the floating ice and surrounding ocean using airborne gravity data.
Renata R. Constantino, Kirsty J. Tinto
wiley   +1 more source

Error Compensation of Strapdown Inertial Navigation System for the Boom-Type Roadheader under Complex Vibration

Axioms, 2021
The strapdown inertial navigation system can provide the navigation information for the boom-type roadheader in the unmanned roadway tunneling working face of the coal mine.
Yang Shen, Pengjiang Wang, Weixiong Zheng, Xiaodong Ji, Hai Jiang, Miao Wu   +5 more
doaj   +1 more source

Airborne Absolute Gravimetry With a Quantum Sensor, Comparison With Classical Technologies

Journal of Geophysical Research: Solid Earth, Volume 128, Issue 4, April 2023., 2023
Abstract We report an airborne gravity survey with an absolute gravimeter based on atom interferometry and two relative gravimeters: a classical LaCoste&Romberg (L&R) and a novel iMAR strapdown Inertial Measurement Unit. We estimated measurement errors for the quantum gravimeter ranging from 0.6 to 1.3 mGal depending on the flight conditions and the ...
Y. Bidel, N. Zahzam, A. Bresson, C. Blanchard, A. Bonnin, J. Bernard, M. Cadoret, T. E. Jensen, R. Forsberg, C. Salaun, S. Lucas, M. F. Lequentrec‐Lalancette, D. Rouxel, G. Gabalda, L. Seoane, D. T. Vu, S. Bruinsma, S. Bonvalot   +17 more
wiley   +1 more source

Tightly Coupled Integrated Navigation Algorithm for Hypersonic Boost-Glide Vehicles in the LCEF Frame

Aerospace, 2021
According to the trajectory characteristics of hypersonic boost-glide vehicles, a tightly coupled integrated navigation algorithm for hypersonic vehicles based on the launch-centered Earth-fixed (LCEF) frame is proposed.
Kai Chen, Sensen Pei, Fuqiang Shen, Shangbo Liu   +3 more
doaj   +1 more source

Novel pedestrian navigation system based on zero velocity update procedure technology and improved Sage‐Husa adaptive Kalman filter with index fading memory factor

IET Wireless Sensor Systems, Volume 13, Issue 2, Page 48-57, April 2023., 2023
To obtain a high‐precision pedestrian location result under the environments that there is no GNSS signal, the paper proposes a novel pedestrian navigation system by using the zero velocity update procedure technology (ZUPT) and the improved Sage–Husa Adaptive Kalman Filter (SHAKF) based on index fading memory.
Lei Huang, Yuting Shi, Jianhua Wang, Xiaoqian Zhang, Daming Xu, Di Sang   +5 more
wiley   +1 more source

Processing algorithm for a strapdown gyrocompass

Scientia Iranica, 2012
AbstractThe problem of gyrocompassing using inertial sensors, i.e., gyros and accelerometers, is addressed. North finding, with an order of accuracy of one arc-min, is not only required for the initial alignment of inertial navigation systems, but also has a critical role to play in the guidance and navigation of ships that navigate for long periods of
Mahdi Hemmati, Mohammad-Ali Massoumnia
openaire   +1 more source

Integrated Navigation Method of Aerospace Vehicle Based on Rank Statistics

International Journal of Aerospace Engineering, Volume 2023, Issue 1, 2023., 2023
The large dynamic and high‐speed flight of aerospace vehicle will bring unpredictable conditions to its navigation system, resulting in that its system random noise probability distribution will no longer meet the preconditions of Gaussian distribution preset by the existing filter algorithm, thus reducing the accuracy of the navigation system.
Jun Kang, Zhi Xiong, Rong Wang, Xinrui Zhang, Marco Pizzarelli   +4 more
wiley   +1 more source

Research status and prospect of shearer positioning technology on fully mechanized coal mining face

Gong-kuang zidonghua, 2017
On the basis of development status of shearer positioning technology on fully mechanized coal mining face at home and abroad, characteristics of conventional shearer positioning technology, shearer positioning technology based on strapdown inertial ...
XIA Ting, LI Wei, WANG Chao, LI Yuche
doaj   +1 more source

A TERRESTRIAL STRAPDOWN NAVIGATION ALGORITHM [PDF]

International Conference on Aerospace Sciences and Aviation Technology, 1991
In this paper terrestrial strapdown navigation computation is investigated. A case study of a navigation computation in local level navigation frame is presented. For this case, the basic equations of the navigation algorithm are derived. A simulation scheme for the evaluation of the algorithm is proposed. The evaluation is based on two criteria.
G. EL-SHEIKH, A. ABDEL-MOHSEN, S. GHONIEMY   +2 more
openaire   +1 more source

Research on positioning method of underground robot based on strapdown inertial navigation and odometer

Gong-kuang zidonghua, 2019
In order to solve problems of difficult positioning and low precision in positioning method of underground mobile robots, a positioning method of underground robot based on strapdown inertial navigation and odometer was proposed.
MA Hongwei, ZHANG Pu, MAO Qinghua, ZHOU Ying   +3 more
doaj   +1 more source