Results 21 to 30 of about 349 (175)
Machines, 2022 A valve-controlled hydraulic cylinder system has the characteristics of uncertainty and time-variance, and the electro-hydraulic servo unit encounters shock, vibration, and other external interference when working, which seriously affect the stability of
Bingwei Gao +3 more
doaj +1 more source
IET Control Theory &Applications, Volume 17, Issue 5, Page 591-604, March 2023., 2023 A state observer is designed to estimate the unmeasured states of the electro‐hydraulic ammunition ramming system. Then, command filtered technology and corresponding compensating technique of filtering errors are further applied to suppress the complexity of differential explosion in backstepping iteration.
Qiang Yin +4 more
wiley +1 more source
IET Power Electronics, Volume 16, Issue 3, Page 357-374, 19 February 2023., 2023 Abstract The flat torque‐angle characteristic of torque motor plays a decisive role in the control quality of electro‐hydraulic servo and proportional valve. To solve the issue that the current wet‐type torque motor for two‐dimensional (2D) valve does not have flat torque‐angle characteristic, a method for adjusting the flat torque‐angle characteristic
Bin Meng +5 more
wiley +1 more source
Applied Sciences, 2020 The traditional valve-controlled hydraulic servo system has large throttling losses and undergoes serious heat problems when used in electro-hydraulic servo systems (EHSSs) for a rolling shear.
Suhong Lin +4 more
doaj +1 more source
Mathematical Problems in Engineering, Volume 2023, Issue 1, 2023., 2023 The rollover phenomenon is quite familiar with trucks and often has severe consequences worldwide. This article focuses on developing a new control structure for the active antiroll bar system using the robust control method. The main objective is to improve the vehicle’s roll stability by using additional suspension roll angle sensors.
Van Tan Vu +2 more
wiley +1 more source
Shock and Vibration, Volume 2023, Issue 1, 2023., 2023 The deformation and failure of the surrounding rock during roadway excavation often determine the choice of supporting methods. To study the deformation behavior and failure modes of the surrounding rock after excavation under unloading stress, structural model tests were carried out with a novel experimental device.
Jinping Liang +4 more
wiley +1 more source
Performance Improvement of a Conventional Hydraulic Elevator by Using Electro-Hydraulic Servo Mechanism [PDF]
Engineering and Technology Journal, 2020 An electro-hydraulic elevator is a new type of enhanced elevators that are used in low-rise buildings that do not exceed more than three floors. In this paper, an electro-hydraulic servo system for controlling the speed of a hydraulic elevator prototype ...
Jamal Mohammed +2 more
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Modelling, transient response and hydraulic behaviour of 2DOF stabilization platform [PDF]
FME Transactions, 2020 The main part of the hydraulic circuit of the hydraulic stabilization platform (HSP) is the electro-hydraulic servo valve (EHSV), which is very expensive due to its manufacturing requirements, so the proper selection for the geometrical configuration of ...
Ibrahim Ezz Eldin +3 more
doaj
Development of Hydraulically Driven Fatigue Testing Machine for Insulators
IEEE Access, 2018 The hydraulically driven fatigue testing machine is studied to simulate the vibration in the fatigue experiments for the insulators. First, hydraulic scheme and control principle are introduced.
Jianlin Xuan, Shoukun Wang
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Design and Analysis of Combined Valve Spool with Linear Flow Coefficient
Journal of Engineering, 2022 The orifice flow model is generally established based on the turbulent state, and the flow discharge is considered to be a constant value. In fact, the flow discharge has obvious nonlinearity under the condition of small opening and small pressure ...
Changxiong Xie +3 more
doaj +1 more source