Results 31 to 40 of about 1,028 (195)
A seventh-order model for dynamic response of an electro-hydraulic servo valve
Chinese Journal of Aeronautics, 2014 AbstractIn this paper, taking two degrees of freedom on the armature–flapper assembly into account, a seventh-order model is deduced and proposed for the dynamic response of a two-stage electro-hydraulic servo valve from nonlinear equations. These deductions are based on fundamental laws of electromagnetism, fluid, and general mechanics.
Liu, Changhai, Jiang, Hongzhou
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Research on Multi-Mode Control of Electro-Hydraulic Variable Displacement Pump Driven by Servo Motor
ActuatorsThe electro-hydraulic power source with an electro-hydraulic variable pump driven by a servo motor is suitable for electrified construction machinery. To achieve better energy efficiency in different working conditions, the multi-mode control scheme was ...
Zhiqiang Zhang +5 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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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
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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
Active fault tolerant control of an electro-hydraulic servo axis with a duplex-valve-system [PDF]
, 2023 In this paper fault detection, fault diagnosis and active fault tolerant control of an electro-hydraulic servo-axis with a duplex-valve-system are described. The fault detection is based on parity equations.
Münchhof, Marco +3 more
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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
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
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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