Results 31 to 40 of about 32,114 (240)

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

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

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

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

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

[Retracted] Motion Control and Tracking Control of UAV Based on Adaptive Sensor

Journal of Sensors, Volume 2023, Issue 1, 2023., 2023
In order to meet the requirements of UAV motion control and tracking control, an adaptive sensor‐based technology is proposed. The main content of the technology is based on the mathematical model of the adaptive sensor, through the quaternion attitude update model, using nonlinear attitude SVDCK filtering and dynamic adaptive adjustment factors and ...
Xin Zhao, Zhihui Xu, Yifeng Fu, Shoupeng Xu, Shasha Xiong, Haibin Lv   +5 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

A tightly‐coupled compressed‐state constraint Kalman Filter for integrated visual‐inertial‐Global Navigation Satellite System navigation in GNSS‐Degraded environments

IET Radar, Sonar &Navigation, Volume 16, Issue 8, Page 1344-1363, August 2022., 2022
Abstract Efficient multi‐sensor fusion is crucial to provide accurate pose estimates for navigating various next‐generation autonomous vehicles such as self‐driving cars, personal air vehicles, urban air mobilities, and electronic vertical take‐off and landing aircraft with respect to a unified global reference frame.
Yu Dam Lee, La Woo Kim, Hyung Keun Lee
wiley   +1 more source

Shearer position and attitude adjustment based on strapdown inertial navigation system

Gong-kuang zidonghua, 2017
For problems of inaccurate shearer position and attitude adjustment, a shearer position and attitude adjustment method based on strapdown inertial navigation system was researched on the ground with slowly varied angle.
ZHANG Qing, WANG Xuewen, XIE Jiacheng, PANG Xinyu, YANG Zhaojian   +4 more
doaj   +1 more source