Results 1 to 10 of about 1,001,812 (223)

Vehicle-Borne Gravity Vector Measurement Method Based on SINS/GNSS/LDV Integrated Navigation

IEEE Access
At present, vehicle-borne gravity measurement mainly focuses on the gravity scalar, and vector measurement has not been developed because of the limitations in attitude measurement accuracy, velocity measurement accuracy and acceleration measurement ...
Chengzhi Hou, Jiayi Cheng, Xu Zhu, Mailun Chen, Guo Wei, Xudong Yu, Jian Zhou, Ye Tian, Chunfeng Gao   +8 more
doaj   +1 more source

A rapid compensation method for launch data of long-range rockets under influence of the Earth's disturbing gravity field

Chinese Journal of Aeronautics, 2017
Abstract Regarding the rapid compensation of the influence of the Earth’ s disturbing gravity field upon trajectory calculation, the key point lies in how to derive the analytical solutions to the partial derivatives of the state of burnout point with respect to the launch data.
Baolin MA, Hongbo ZHANG, Wei ZHENG, Jie WU   +3 more
openaire   +1 more source

Improved Active Disturbance Rejection Control for Multibody Folding Wing Under Variable Loads

Shanghai Jiaotong Daxue xuebao
To address the issue of multi-body folding wings being subjected to aerodynamic load changes, gravity reversal, and external disturbances during coordinated tilting, an improved active disturbance rejection control (ADRC) strategy based on the ...
HAN Yifan, CHEN Boyi, LIU Yanbin, CHEN Jinbao
doaj   +1 more source

Development of a Wearable Arm Exoskeleton for Teleoperation Featuring with Model-Data Fusion to Gravity Compensation

Applied Sciences
The upper-limb exoskeleton is ergonomically designed to align with human arm motion and can be configured for deployment as a master tool manipulator (MTM) in teleoperation systems.
Lingda Meng, Wusheng Chou
doaj   +1 more source

Global Fast Terminal Sliding Mode Control of Underwater Manipulator Based on Finite-Time Extended State Observer

Journal of Marine Science and Engineering
This study investigates the trajectory-tracking control problem of a two-degree-of-freedom underwater manipulator operating in a complex disturbance environment. A dynamic model of the multi-link serial manipulator is first established.
Ran Wang, Weiquan Huang, Junyu Wu, He Wang, Jixiang Li   +4 more
doaj   +1 more source

Plug-In Repetitive Control for Magnetic Bearings Based on Equivalent-Input-Disturbance

Eng
The radial magnetic bearing system is an open-loop, unstable, strong nonlinear system with a high rotor speed, predisposition to jitter, and poor interference immunity.
Gang Huang, Bolong Liu, Songlin Yuan, Xinyi Shi   +3 more
doaj   +1 more source

Disturbance observer‐based model predictive control of a coaxial octorotor with variable centre of gravity

IET Control Theory & Applications
This paper presents a model predictive control (MPC) approach based on the extended disturbance observer (EDOB) for trajectory tracking of a coaxial octorotor unmanned aerial vehicle (UAV).
Reza Ebrahimpour Derakhshan, Mohammad Danesh, Hassan Moosavi   +2 more
doaj   +1 more source

An Algorithm for Strapdown Airborne Gravity Disturbance Vector Measurement Based on High-Precision Navigation and EGM2008

Sensors
Attitude errors, accelerometer bias, the gravity disturbance vector, and their coupling are the primary factors obstructing strapdown airborne vector gravimetry.
Ke Fang, Tijing Cai
doaj   +1 more source

Force–Position Coordinated Compliance Control in the Adhesion/Detachment Process of Space Climbing Robot

Aerospace
Adhesion-based space climbing robots, with their flexibility and multi-functional capabilities, are seen as a promising candidate for in-orbit maintenance.
Changtai Wen, Pengfei Zheng, Zhenhao Jing, Chongbin Guo, Chao Chen   +4 more
doaj   +1 more source

Hybrid PID-Guided Deep Reinforcement Learning Framework for Mars Quadrotor Attitude Control

IEEE Access
Mars aerial exploration is a core direction of deep space exploration, and the attitude control of quadrotor aircraft is the key technology to ensure its flight stability.
Li Zhiqing, Wang Yanbo, Ma Yao, Liu Ming, Wang Zhen   +4 more
doaj   +1 more source