Results 1 to 10 of about 1,786,998 (319)

Natural Deterioration Processes of Salix psammophila Sand Barriers in Atmospheric Exposure Section

Frontiers in Plant Science, 2022
The atmospheric conditions of desert environments are important for the protection of Salix psammophila Sand Barrier, and these conditions can affect and change the structure and performance of the sand barrier, causing them to lose their wind proofing ...
Ruidong Wang, Xiaohong Dang, Xiaohong Dang, Yong Gao, Xia Yang, Yumei Liang, Chen Zhao, Xiaoting Duan   +7 more
doaj   +1 more source

Tracking control based on proportional resonant controller for electro‐hydraulic systems with input delay

IET Control Theory & Applications, 2023
The growth of marine resources exploitation has led to increased research interest in electro‐hydraulic systems for marine simulation. This study proposes a proportional plus resonant (PR) controller to achieve high tracking performance for electro ...
Shengwang Ye, Guo‐Ping Liu, Wenshan Hu, Yong Wu, Zhuo Fan, Haoyu Li   +5 more
doaj   +1 more source

Observation reconstruction and disturbance compensation-based position control for autonomous underwater vehicle

Systems Science & Control Engineering, 2022
To address the position control problem of a six degrees of freedom autonomous underwater vehicle (AUV), the disturbance is observed by an observer and compensated by a controller in this paper.
Wanping Song, Zengqiang Chen, Mingwei Sun, Qinglin Sun   +3 more
doaj   +1 more source

Robust Nonlinear Position Control with Extended State Observer for Single-Rod Electro-Hydrostatic Actuator

Mathematics, 2021
In the existing literature, studies on position controller design using only position feedback, considering the disturbances for single-rod electro-hydrostatic actuators (EHAs), have not been reported.
Young Seop Son, Wonhee Kim
doaj   +1 more source

High-Accuracy Position-Aware Robot for Agricultural Automation Using Low-Cost IMU-Coupled Triple-Laser-Guided (TLG) System

IEEE Access, 2021
A novel, low-cost approach to high-accuracy robot localization for agricultural applications using an image-processing triple-laser-guided (TLG) system coupled with an inertial measurement unit (IMU) is presented in this paper. The TLG system consists of
Supod Kaewkorn, Mongkol Ekpanyapong, Ukrit Thamma   +2 more
doaj   +1 more source

Position Control of Quadrotor UAV Based on Cascade Fuzzy Neural Network

Energies, 2022
In this article, a cascade fuzzy neural network (FNN) control approach is proposed for position control of quadrotor unmanned aerial vehicle (UAV) system with high coupling and underactuated.
Jinjun Rao, Bo Li, Zhen Zhang, Dongdong Chen, Wojciech Giernacki   +4 more
doaj   +1 more source

FPGA-Based Hybrid Stepper Motor Drive System Design by Variable Structure Control

Actuators, 2021
A stepper motor is usually operated in position open-loop control for simplicity. However, in order to improve the transient and steady-state performances of the stepper motor-based drive system, a high performance stepper motor drive system is usually ...
Chiu-Keng Lai, Bo-Wei Lin, Hsiang-Yueh Lai, Guan-You Chen   +3 more
doaj   +1 more source

Investigation of X and Y Configuration Modal and Dynamic Response to Velocity Excitation of the Nanometer Resolution Linear Servo Motor Stage with Quasi-Industrial Guiding System in Quasi-Stable State

Mathematics, 2021
Research institutions and industrial enterprises demand high accuracy and precision positioning systems to fulfil cutting edge requirements of up-to-date technological processes in the field of metrology and optical fabrication.
Artur Piščalov, Edgaras Urbonas, Darius Vainorius, Jonas Matijošius, Artūras Kilikevičius   +4 more
doaj   +1 more source

Study of Dynamic Performance and Control Strategy of Variable Stiffness Actuator System Based on Two-Inertial-System

Mathematics, 2023
The study of position control for variable stiffness actuators is important for improving their energy efficiency and robustness. In this paper, for the previously proposed nonlinear variable stiffness actuator, firstly, a dynamic model of the variable ...
Zemin Yang, Xiaopeng Li, Jinchi Xu, Renzhen Chen, Hexu Yang   +4 more
doaj   +1 more source

Design and Position Control of Overhang-Type Rail Mover Using Dual BLAC Motor

Energies, 2021
This paper presents the design and position control scheme of an overhang-type rail mover system driven by a dual Brushless AC (BLAC) motor with a simple Hall position sensor inside each motor.
Kiwan Cho, Dong-Hee Lee
doaj   +1 more source