Results 21 to 30 of about 482,210 (293)

Real-Time Terrain-Following of an Autonomous Quadrotor by Multi-Sensor Fusion and Control

Applied Sciences, 2021
For the application of the autonomous guidance of a quadrotor from confined undulant ground, terrain-following is the major issue for flying at a low altitude.
Yuan Yang, Yongjiang Huang, Haoran Yang, Tingting Zhang, Zixuan Wang, Xixiang Liu   +5 more
doaj   +1 more source

A Novel Hybrid of a Fading Filter and an Extreme Learning Machine for GPS/INS during GPS Outages

Sensors, 2018
In this paper, a novel algorithm based on the combination of a fading filter (FF) and an extreme learning machine (ELM) is presented for Global Positioning System/Inertial Navigation System (GPS/INS) integrated navigation systems.
Di Wang, Xiaosu Xu, Yongyun Zhu
doaj   +1 more source

Trajectory Tracking of UAVs Using Sigmoid Tracking Differentiator and Variable Gain Finite-Time Extended State Observer

Drones, 2022
The problem of quadrotor attitude and position control is considered in the presence of generally lumped disturbances: external disturbances and model uncertainty.
Wenxing Zhu, Lihui Wang, Yuan Ren, Yong Li   +3 more
doaj   +1 more source

A Coarse Alignment Method Based on Digital Filters and Reconstructed Observation Vectors

Sensors, 2017
In this paper, a coarse alignment method based on apparent gravitational motion is proposed. Due to the interference of the complex situations, the true observation vectors, which are calculated by the apparent gravity, are contaminated.
Xiang Xu, Xiaosu Xu, Tao Zhang, Yao Li, Zhicheng Wang   +4 more
doaj   +1 more source

AUV Underwater Positioning Algorithm Based on Interactive Assistance of SINS and LBL

Sensors, 2015
This paper studies an underwater positioning algorithm based on the interactive assistance of a strapdown inertial navigation system (SINS) and LBL, and this algorithm mainly includes an optimal correlation algorithm with aided tracking of an SINS ...
Tao Zhang, Liping Chen, Yao Li
doaj   +1 more source

KEYFRAME-BASED VISUAL-INERTIAL SLAM USING NONLINEAR OPTIMIZATION [PDF]

, 2013
The fusion of visual and inertial cues has become popular in robotics due to the complementary nature of the two sensing modalities. While most fusion strategies to date rely on filtering schemes, the visual robotics community has recently turned to non ...
Konolige, Kurt, Rabaud, V, Stefan Leutenegger, Chli, Margarita, Kurt Konolige, Roland Siegwart, Chli, Margarita; id_orcid, Siegwart, Roland, Furgale, P, Chli, M, Paul Furgale, Vincent Rabaud, Leutenegger, S, Margarita Chli, Leutenegger, Stefan, Furgale, Paul, Rabaud, Vincent, Leutenegger, S., Konolige, K, Siegwart, R   +19 more
core   +1 more source

A Robust Parallel Initialization Method for Monocular Visual-Inertial SLAM

Sensors, 2022
In order to improve the initialization robustness of visual inertial SLAM, the complementarity of the optical flow method and the feature-based method can be used in vision data processing.
Min Zhong, Yiqing Yao, Xiaosu Xu, Hongyu Wei   +3 more
doaj   +1 more source

The Four Key Challenges of Advanced Multisensor Navigation and Positioning [PDF]

, 2014
The next generation of navigation and positioning systems must provide greater accuracy and reliability in a range of challenging environments to meet the needs of a variety of mission-critical applications.
Martin, H, Jiang, Z, Henry Martin, Groves, PD, Wang, L, Lei Wang, Ziyi Jiang, Walter, D, Voutsis, K, Kimon Voutsis, Debbie Walter, Paul D Groves   +11 more
core   +1 more source

Underwater Positioning Algorithm Based on SINS/LBL Integrated System

IEEE Access, 2018
The interactive assistance of a strap-down inertial navigation system (SINS) and a long baseline (LBL) underwater positioning algorithm based on time of arrival is studied, and this algorithm mainly includes a solution algorithm of equivalent sound ...
Tao Zhang, Liping Chen, Yaxiong Yan
doaj   +1 more source

An Adaptive Damping Network Designed for Strapdown Fiber Optic Gyrocompass System for Ships

Sensors, 2017
The strapdown fiber optic gyrocompass (strapdown FOGC) system for ships primarily works on external horizontal damping and undamping statuses. When there are large sea condition changes, the system will switch frequently between the external horizontal ...
Jin Sun, Xiaosu Xu, Yiting Liu, Tao Zhang, Yao Li, Jinwu Tong   +5 more
doaj   +1 more source