Results 31 to 40 of about 1,636 (211)

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

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

Research on the Update Method of Attitude Quaternion for Strapdown Inertial Navigation [PDF]

IEEE Access, 2021
In the strapdown inertial navigation system, the accuracy of the solving attitude and position is closely related to the quaternion update algorithm. For this reason, what method is used to update the quaternion has become an important project. At present, the primary method is to update the quaternion by solving the equivalent rotation vector.
Debiao Zhang, Jie Li 0036, Yang Liu 0210, Xiaokai Wei, Kaiqiang Feng   +4 more
openaire   +2 more sources

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

An improved initial alignment method based on adaptive robust CKF algorithm

Xibei Gongye Daxue Xuebao, 2022
When the misalignment angle is a large angle in the strapdown inertial navigation system (SINS), it is necessary to establish a nonlinear error model to estimate the error.
LI Pu, YANG Tao, MU Hongwei
doaj   +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 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

High‐Precision Positioning Simulation and Experimental Research of Special Operation Vehicles Based on Network RTK

Computational Intelligence and Neuroscience, Volume 2023, Issue 1, 2023., 2023
In terms of driverless systems, high‐precision positioning technology is one among the critical aspects of driverless cars to achieve driverlessness. This study analyzed the working principles of GNSS (global navigation satellite system) and SINS (strapdown inertial navigation system) and elaborated the principles of the least square method and LAMBDA ...
Zhongyi Zhao, Yongzhi Cui, Shenyu Wang, Gopal Chaudhary   +3 more
wiley   +1 more source

The Analysis of Spaceborne SAR Interferometry Based on Strapdown Inertial Navigation Mechanism and Maximum Likelihood Method

Chemical Engineering Transactions, 2016
In this paper, a spaceborne SAR interferometry system operates on the strapdown inertial navigation mechanism, which is based on maximum likelihood phase estimation method. It has been shown using simulated data that phase estimation of cross-track multi-
S.G. Lei, L. Zhang, W.P. Li
doaj   +1 more source

Using Functionally Redundant Inertial Measurement Units to Increase Reliability and Ensure Fault Tolerance

Inventions, 2023
This paper aims to assess the possibility of using functionally redundant inertial units to solve problems of increasing reliability and ensuring the fault tolerance of the various classes and purposes of aircraft navigation systems.
Ivan M. Kuznetsov, Konstantin K. Veremeenko, Maxim V. Zharkov, Andrey N. Pronkin   +3 more
doaj   +1 more source