Modeling and characteristics analysis of single-rod hydraulic system using electro-hydrostatic actuator

Oh, Joo-Young; Gyu-hong, Jung; Lee, Geun-Ho; Park, Young-Jun; Song, Chun‐Qing

doi:10.1007/s12541-012-0190-4

Cited by 23 publications

(10 citation statements)

References 3 publications

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“…e bulk modulus of the piston rod is nearly 100 times that of the bulk modulus of hydraulic oil, so it is regarded as a rigid body. So the spring stiffness of the hydraulic cylinder system of the rolling mill is produced by the spring stiffness of the hydraulic oil [24]. e oil in the two cavities is always under pressure and in compression state, so the total hydraulic spring stiffness of the hydraulic cylinder can be equivalent to the parallel of the hydraulic spring stiffness of the two cavities [25].…”

Section: Nonlinear Spring Forcementioning

confidence: 99%

Vibration Characteristics of Rolling Mill System under Constraints of the Nonlinear Spring Force and Friction Force from Hydraulic Cylinder

Liu

Pan

Jiang

et al. 2021

Shock and Vibration

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Considering the two kinds of nonlinear constraints of rolling mill hydraulic cylinder, spring force and friction force, the vibration model of rolling mill system is established. The amplitude frequency response equations are obtained by using the average method. Comparing the time history curves of vertical vibration displacement of rolling mill system under the nonlinear spring force and friction force, the amplitude frequency characteristic curves are simulated. The external excitation amplitude is viewed as the bifurcation parameter, and the system bifurcation response changing with the external excitation amplitude is analyzed. The influence of the external excitation amplitude on the system stability is studied. The results indicate that the increase of the nonlinear spring force makes the rolling mill system’s unstable area to become wider, and the influence on the rolling mill system of nonlinear friction force behaves as the damping characteristics; the vibration of rolling mill system is alternating between the periodic, period-doubling, and the chaotic motion. The research results provide a theoretical support for restraining the vibration of the rolling mill system in the actual production process.

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Section: Nonlinear Spring Forcementioning

confidence: 99%

Vibration Characteristics of Rolling Mill System under Constraints of the Nonlinear Spring Force and Friction Force from Hydraulic Cylinder

Liu

Pan

Jiang

et al. 2021

Shock and Vibration

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“…Then, using the form of (29) to (32), the predict and time update equations of the EKBUIO can be formulated as follows …”

Section: Parameter Estimationmentioning

confidence: 99%

Modeling and fault tolerant control of an electro-hydraulic actuator

Nahian

Dinh

Chowdhury

et al. 2016

Int. J. Precis. Eng. Manuf.

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“…On the other hand, the dynamics of the BLDC motor with controller, that is, electric part of the EHA system, is considered as [14, 23]

\begin{matrix} G_{m} (s) = \frac{ω_{p} (s)}{v_{r} (s)} = \frac{K_{m} (T_{1} s + 1)}{T_{m_{1}} s^{2} + T_{m_{2}} s + 1}, \end{matrix}

where K m , T 1 , T m 1 , and T m 2 are parameters of the BLDC motor with controller.…”

Section: Modeling Of Position Control System Of Ehamentioning

confidence: 99%

Design and Experimental Evaluation of a Robust Position Controller for an Electrohydrostatic Actuator Using Adaptive Antiwindup Sliding Mode Scheme

Lee

Park

Kim

2013

The Scientific World Journal

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A robust control scheme is proposed for the position control of the electrohydrostatic actuator (EHA) when considering hardware saturation, load disturbance, and lumped system uncertainties and nonlinearities. To reduce overshoot due to a saturation of electric motor and to realize robustness against load disturbance and lumped system uncertainties such as varying parameters and modeling error, this paper proposes an adaptive antiwindup PID sliding mode scheme as a robust position controller for the EHA system. An optimal PID controller and an optimal anti-windup PID controller are also designed to compare control performance. An EHA prototype is developed, carrying out system modeling and parameter identification in designing the position controller. The simply identified linear model serves as the basis for the design of the position controllers, while the robustness of the control systems is compared by experiments. The adaptive anti-windup PID sliding mode controller has been found to have the desired performance and become robust against hardware saturation, load disturbance, and lumped system uncertainties and nonlinearities.

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Modeling and characteristics analysis of single-rod hydraulic system using electro-hydrostatic actuator

Cited by 23 publications

References 3 publications

Vibration Characteristics of Rolling Mill System under Constraints of the Nonlinear Spring Force and Friction Force from Hydraulic Cylinder

Vibration Characteristics of Rolling Mill System under Constraints of the Nonlinear Spring Force and Friction Force from Hydraulic Cylinder

Modeling and fault tolerant control of an electro-hydraulic actuator

Design and Experimental Evaluation of a Robust Position Controller for an Electrohydrostatic Actuator Using Adaptive Antiwindup Sliding Mode Scheme

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