Optimal Design of Accumulator Parameters for an Electro-Hydrostatic Actuator at Low Speed

The electro-hydrostatic actuator (EHA) is a type of highly integrated, compact, closed pump control drive system composed of a servo motor, a metering pump, a hydraulic cylinder and other components. Compared with the traditional valve control system, the electro-hydrostatic actuator has the advanta...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Gexin Chen, Gengting Qiu, Guishan Yan, Tiangui Zhang, Huilong Liu, Wenbin Chen, Chao Ai
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	electro-hydrostatic actuator (EHA) pressure pulsation accumulator cogging torque flux harmonics Chemical technology TP1-1185 Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/93f1fcf55aa84f91ab5b6b92ce56c621
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:93f1fcf55aa84f91ab5b6b92ce56c621
record_format	dspace
spelling	oai:doaj.org-article:93f1fcf55aa84f91ab5b6b92ce56c6212021-11-25T18:50:17ZOptimal Design of Accumulator Parameters for an Electro-Hydrostatic Actuator at Low Speed10.3390/pr91119032227-9717https://doaj.org/article/93f1fcf55aa84f91ab5b6b92ce56c6212021-10-01T00:00:00Zhttps://www.mdpi.com/2227-9717/9/11/1903https://doaj.org/toc/2227-9717The electro-hydrostatic actuator (EHA) is a type of highly integrated, compact, closed pump control drive system composed of a servo motor, a metering pump, a hydraulic cylinder and other components. Compared with the traditional valve control system, the electro-hydrostatic actuator has the advantages of a high power-to-weight ratio, high integration, environmental friendliness, and superior efficiency and energy saving. However, due to the complex mechanical–hydraulic coupling mechanism of the system and the existence of non-linear multi-source disturbances, the dynamic and static performance of the system is limited, particularly the pressure pulsation phenomenon under low-speed conditions, which seriously affects the high precision control requirements of the system. In order to address the low-speed pressure pulsation problem of the electro-hydrostatic actuator, first, the mathematical models of the servo motor, metering pump and hydraulic cylinder are established, and the simulation model of the EHA system is created based on MATLAB/Simulink. Second, from aspects of the servo motor and the quantitative piston pump, the causes of the pressure pulsation under low-speed working conditions are analyzed, and the parameter selection method of the accumulator is proposed to eliminate the pressure pulsation based on <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msub><mi>ω</mi><mi>n</mi></msub></mrow></semantics></math></inline-formula> and <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mi>ζ</mi></semantics></math></inline-formula> of the EHA system. Finally, the optimal charging pressure of the accumulator is simulated and experimentally analyzed. The simulation and experimental results show that the charging pressure range of the accumulator calculated with this method can effectively improve the pressure pulsation phenomenon of the EHA system under low-speed working conditions, and it plays a positive role in the engineering popularization and application of the EHA system.Gexin ChenGengting QiuGuishan YanTiangui ZhangHuilong LiuWenbin ChenChao AiMDPI AGarticleelectro-hydrostatic actuator (EHA)pressure pulsationaccumulatorcogging torqueflux harmonicsChemical technologyTP1-1185ChemistryQD1-999ENProcesses, Vol 9, Iss 1903, p 1903 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	electro-hydrostatic actuator (EHA) pressure pulsation accumulator cogging torque flux harmonics Chemical technology TP1-1185 Chemistry QD1-999
spellingShingle	electro-hydrostatic actuator (EHA) pressure pulsation accumulator cogging torque flux harmonics Chemical technology TP1-1185 Chemistry QD1-999 Gexin Chen Gengting Qiu Guishan Yan Tiangui Zhang Huilong Liu Wenbin Chen Chao Ai Optimal Design of Accumulator Parameters for an Electro-Hydrostatic Actuator at Low Speed
description	The electro-hydrostatic actuator (EHA) is a type of highly integrated, compact, closed pump control drive system composed of a servo motor, a metering pump, a hydraulic cylinder and other components. Compared with the traditional valve control system, the electro-hydrostatic actuator has the advantages of a high power-to-weight ratio, high integration, environmental friendliness, and superior efficiency and energy saving. However, due to the complex mechanical–hydraulic coupling mechanism of the system and the existence of non-linear multi-source disturbances, the dynamic and static performance of the system is limited, particularly the pressure pulsation phenomenon under low-speed conditions, which seriously affects the high precision control requirements of the system. In order to address the low-speed pressure pulsation problem of the electro-hydrostatic actuator, first, the mathematical models of the servo motor, metering pump and hydraulic cylinder are established, and the simulation model of the EHA system is created based on MATLAB/Simulink. Second, from aspects of the servo motor and the quantitative piston pump, the causes of the pressure pulsation under low-speed working conditions are analyzed, and the parameter selection method of the accumulator is proposed to eliminate the pressure pulsation based on <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msub><mi>ω</mi><mi>n</mi></msub></mrow></semantics></math></inline-formula> and <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mi>ζ</mi></semantics></math></inline-formula> of the EHA system. Finally, the optimal charging pressure of the accumulator is simulated and experimentally analyzed. The simulation and experimental results show that the charging pressure range of the accumulator calculated with this method can effectively improve the pressure pulsation phenomenon of the EHA system under low-speed working conditions, and it plays a positive role in the engineering popularization and application of the EHA system.
format	article
author	Gexin Chen Gengting Qiu Guishan Yan Tiangui Zhang Huilong Liu Wenbin Chen Chao Ai
author_facet	Gexin Chen Gengting Qiu Guishan Yan Tiangui Zhang Huilong Liu Wenbin Chen Chao Ai
author_sort	Gexin Chen
title	Optimal Design of Accumulator Parameters for an Electro-Hydrostatic Actuator at Low Speed
title_short	Optimal Design of Accumulator Parameters for an Electro-Hydrostatic Actuator at Low Speed
title_full	Optimal Design of Accumulator Parameters for an Electro-Hydrostatic Actuator at Low Speed
title_fullStr	Optimal Design of Accumulator Parameters for an Electro-Hydrostatic Actuator at Low Speed
title_full_unstemmed	Optimal Design of Accumulator Parameters for an Electro-Hydrostatic Actuator at Low Speed
title_sort	optimal design of accumulator parameters for an electro-hydrostatic actuator at low speed
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/93f1fcf55aa84f91ab5b6b92ce56c621
work_keys_str_mv	AT gexinchen optimaldesignofaccumulatorparametersforanelectrohydrostaticactuatoratlowspeed AT gengtingqiu optimaldesignofaccumulatorparametersforanelectrohydrostaticactuatoratlowspeed AT guishanyan optimaldesignofaccumulatorparametersforanelectrohydrostaticactuatoratlowspeed AT tianguizhang optimaldesignofaccumulatorparametersforanelectrohydrostaticactuatoratlowspeed AT huilongliu optimaldesignofaccumulatorparametersforanelectrohydrostaticactuatoratlowspeed AT wenbinchen optimaldesignofaccumulatorparametersforanelectrohydrostaticactuatoratlowspeed AT chaoai optimaldesignofaccumulatorparametersforanelectrohydrostaticactuatoratlowspeed
_version_	1718410660763664384

Optimal Design of Accumulator Parameters for an Electro-Hydrostatic Actuator at Low Speed

Ejemplares similares