A Critical Analysis of Flow-Compensated Hydrostatic Single Rod Actuators: Simulation Study

It is well established that the differential cylinder area in pump-controlled single-rod actuators creates the need of correctly switching the connections between the main circuit lines and a charge circuit, in order to provide means for equalising the flows into and out of the pump and the actuator...

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Main Authors: Gustavo Koury Costa, Nariman Sepehri
Format: Article
Language:English
Published: MDPI AG 2020-07-01
Series:Actuators
Subjects:
Online Access:https://www.mdpi.com/2076-0825/9/3/58
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spelling doaj-2e7805c311d442bb991060533f9d2bf22020-11-25T03:26:22ZengMDPI AGActuators2076-08252020-07-019585810.3390/act9030058A Critical Analysis of Flow-Compensated Hydrostatic Single Rod Actuators: Simulation StudyGustavo Koury Costa0Nariman Sepehri1Department of Mechanical Engineering, Federal Institute of Science and Technology of the State of Pernambuco, Recife 50740-545, BrazilDepartment of Mechanical Engineering, University of Manitoba, Winnipeg, MB R3T5V6, CanadaIt is well established that the differential cylinder area in pump-controlled single-rod actuators creates the need of correctly switching the connections between the main circuit lines and a charge circuit, in order to provide means for equalising the flows into and out of the pump and the actuator. Many attempts to automatically switch the charge circuit connections to either cap- and rod-sides of the hydraulic cylinder have been made through the years. However, in many of these attempts, strong oscillations in the cylinder motion were observed when operational quadrants were changed under some particular velocity and force conditions. In this paper, we perform a thorough numerical analysis for some representative pump-controlled single-rod actuators. The goal is to understand the causes of undesirable behaviour of several circuits under certain operating situations. We show through comprehensive simulations that all but one circuit design produces undesirable oscillatory results under these circumstances. This paper is built upon and complements a previously published paper by the same authors on this important subject.https://www.mdpi.com/2076-0825/9/3/58hydrostatic actuatorspump-controlled actuatorssingle-rod actuators
collection DOAJ
language English
format Article
sources DOAJ
author Gustavo Koury Costa
Nariman Sepehri
spellingShingle Gustavo Koury Costa
Nariman Sepehri
A Critical Analysis of Flow-Compensated Hydrostatic Single Rod Actuators: Simulation Study
Actuators
hydrostatic actuators
pump-controlled actuators
single-rod actuators
author_facet Gustavo Koury Costa
Nariman Sepehri
author_sort Gustavo Koury Costa
title A Critical Analysis of Flow-Compensated Hydrostatic Single Rod Actuators: Simulation Study
title_short A Critical Analysis of Flow-Compensated Hydrostatic Single Rod Actuators: Simulation Study
title_full A Critical Analysis of Flow-Compensated Hydrostatic Single Rod Actuators: Simulation Study
title_fullStr A Critical Analysis of Flow-Compensated Hydrostatic Single Rod Actuators: Simulation Study
title_full_unstemmed A Critical Analysis of Flow-Compensated Hydrostatic Single Rod Actuators: Simulation Study
title_sort critical analysis of flow-compensated hydrostatic single rod actuators: simulation study
publisher MDPI AG
series Actuators
issn 2076-0825
publishDate 2020-07-01
description It is well established that the differential cylinder area in pump-controlled single-rod actuators creates the need of correctly switching the connections between the main circuit lines and a charge circuit, in order to provide means for equalising the flows into and out of the pump and the actuator. Many attempts to automatically switch the charge circuit connections to either cap- and rod-sides of the hydraulic cylinder have been made through the years. However, in many of these attempts, strong oscillations in the cylinder motion were observed when operational quadrants were changed under some particular velocity and force conditions. In this paper, we perform a thorough numerical analysis for some representative pump-controlled single-rod actuators. The goal is to understand the causes of undesirable behaviour of several circuits under certain operating situations. We show through comprehensive simulations that all but one circuit design produces undesirable oscillatory results under these circumstances. This paper is built upon and complements a previously published paper by the same authors on this important subject.
topic hydrostatic actuators
pump-controlled actuators
single-rod actuators
url https://www.mdpi.com/2076-0825/9/3/58
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