Results 11 to 20 of about 349 (175)
Investigation of temperature rise characteristics in the pre-stage of a deflector jet servo valve [PDF]
Scientific ReportsIn aerospace equipment, the deflector jet servo valve is a high-end core control component of electro-hydraulic servo systems. The pre-stage is crucial because of the compact structure and complex jet morphology.
Li Ma +4 more
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The pressure control of independent load port electro-hydraulic load simulation system using fixed time integral sliding mode active disturbance rejection [PDF]
Scientific ReportsTo address the issues of motion disturbance and low loading accuracy in electro-hydraulic load simulation systems, and to effectively mitigate the impact of uncertainty on system performance, this paper proposes a novel independent load port electro ...
He Hao, Hao Yan
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Design and Control of a Linear Rotary Electro-Hydraulic Servo Drive Unit
Applied Sciences, 2023 In this paper, a new solution for an electro-hydraulic servo drive is proposed, which consists of two electro-hydraulic servo drives: one with a hydraulic cylinder and one with a hydraulic rotary motor.
Andrzej Milecki +2 more
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Synchronization of the movement for multi-cylinder electrohydraulic servo driver [PDF]
EPJ Web of Conferences, 2022 The article presents the problem of synchronization of piston rods velocity of the multi-cylinder electro-hydraulic servo drive. This task was presented on the example of a heavily loaded mobile caterpillar platform.
Woś Piotr, Dindorf Ryszard
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Dual-valve parallel prediction control for an electro-hydraulic servo system [PDF]
Science Progress, 2019 To improve the dynamic response performance of a high-flow electro-hydraulic servo system, scholars have conducted considerable research on the synchronous and time-sharing controls of multiple valves. However, most scholars have used offline optimization to improve control performance.
Shi-jie Su +4 more
openaire +2 more sources
Applied Sciences, 2023 Direct-drive electro-hydraulic servo valves are widely used in the aerospace industry, in the military, and in remote sensing control, but there is little research and discussion on their performance degradation and service life prediction.
Juncheng Mi, Guoqin Huang
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IET Control Theory &Applications, Volume 17, Issue 18, Page 2496-2505, December 2023., 2023 This paper studied the periodic reference tracking in electro‐hydraulic systems and provided a general PR controller to achieve high tracking performance. The related stability result is derived by the Routh–Hurwitz criterion. Abstract The growth of marine resources exploitation has led to increased research interest in electro‐hydraulic systems for ...
Shengwang Ye +5 more
wiley +1 more source
IET Intelligent Transport Systems, Volume 17, Issue 11, Page 2268-2284, November 2023., 2023 Accurate control of front wheel angle is essential in intelligent vehicle electric‐hydraulic power steering (EHPS) system, because it has a significant impact on the safety, comfort, and reliability of vehicle steering. However, the accurate control of front wheel angle is a challenging problem due to the non‐linearity of hydraulic power in the ...
Yafei Li, Yiyong Yang
wiley +1 more source
Claw‐pole magnetic levitation torque motor for 2D valve with automatic neutral adjustment
IET Electric Power Applications, Volume 17, Issue 10, Page 1285-1303, October 2023., 2023 A claw‐pole magnetic levitation torque motor with neutral regulation by means of cogging torque is proposed. A qualitative formula for the output torque is derived based on equivalent magnetic circuit, and the structural parameters of this torque motor are optimised by response surface method and NSGA‐2.
Jiahui Huang +3 more
wiley +1 more source
IET Power Electronics, Volume 16, Issue 13, Page 2261-2274, 14 October 2023., 2023 Narendra adaptive control is considered as the external‐loop and LADRC is considered as the internal‐loop to adjust controller parameters in real‐time, while the “total disturbance” can be estimated and compensated. The designed adaptive control law not only contains the augmentation error term of the system but also introduces the system state ...
HongTao Shi +5 more
wiley +1 more source