Active Load-Sensitive Electro-Hydrostatic Actuator for More Electric Aircraft

In the flight control system, using an electro-hydrostatic actuator (EHA) instead of the currently used relatively mature electro-hydraulic valve-controlled actuator, there are three prevailing concerns, namely heating, size, and stiffness. This paper proposes a novel principle EHA, called active lo...

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Main Authors: Ligang Huang, Tian Yu, Zongxia Jiao, Yanpeng Li
Format: Article
Language:English
Published: MDPI AG 2020-10-01
Series:Applied Sciences
Subjects:
Online Access:https://www.mdpi.com/2076-3417/10/19/6978
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spelling doaj-50eba4e75d28482b823e95b0d99d636c2020-11-25T03:17:13ZengMDPI AGApplied Sciences2076-34172020-10-01106978697810.3390/app10196978Active Load-Sensitive Electro-Hydrostatic Actuator for More Electric AircraftLigang Huang0Tian Yu1Zongxia Jiao2Yanpeng Li3School of Automation Science and Electrical Engineering, Beihang University, Beijing 100191, ChinaSchool of Automation Science and Electrical Engineering, Beihang University, Beijing 100191, ChinaSchool of Automation Science and Electrical Engineering, Beihang University, Beijing 100191, ChinaSchool of Automation Science and Electrical Engineering, Beihang University, Beijing 100191, ChinaIn the flight control system, using an electro-hydrostatic actuator (EHA) instead of the currently used relatively mature electro-hydraulic valve-controlled actuator, there are three prevailing concerns, namely heating, size, and stiffness. This paper proposes a novel principle EHA, called active load-sensitive EHA (ALS-EHA), which can actively realize the adaptive adjustment of pump displacement with load pressure. Its principle analysis and mathematical modeling based on the direct load-sensitive EHA (DLS-EHA) configuration is done to obtain the relationship between motor current and hydraulic reduction ratio. Then, its stiffness characteristics are analyzed, especially the influence of hydraulic reduction ratio on impedance at low frequencies combined with investigating the power matching of ALS-EHA. A comparative experiment between the developed ALS-EHA and the EHA with fixed pump displacement and variable motor speed (EHA-FPVM) was carried out. The results reveal that the proposed ALS-EHA can reduce the motor heating and its displacement tracking error is smaller near zero speed owing to its higher impedance from the lower hydraulic reduction ratio under heavy load conditions.https://www.mdpi.com/2076-3417/10/19/6978electro-hydrostatic actuator (EHA)active load-sensitivestiffnesspower matching
collection DOAJ
language English
format Article
sources DOAJ
author Ligang Huang
Tian Yu
Zongxia Jiao
Yanpeng Li
spellingShingle Ligang Huang
Tian Yu
Zongxia Jiao
Yanpeng Li
Active Load-Sensitive Electro-Hydrostatic Actuator for More Electric Aircraft
Applied Sciences
electro-hydrostatic actuator (EHA)
active load-sensitive
stiffness
power matching
author_facet Ligang Huang
Tian Yu
Zongxia Jiao
Yanpeng Li
author_sort Ligang Huang
title Active Load-Sensitive Electro-Hydrostatic Actuator for More Electric Aircraft
title_short Active Load-Sensitive Electro-Hydrostatic Actuator for More Electric Aircraft
title_full Active Load-Sensitive Electro-Hydrostatic Actuator for More Electric Aircraft
title_fullStr Active Load-Sensitive Electro-Hydrostatic Actuator for More Electric Aircraft
title_full_unstemmed Active Load-Sensitive Electro-Hydrostatic Actuator for More Electric Aircraft
title_sort active load-sensitive electro-hydrostatic actuator for more electric aircraft
publisher MDPI AG
series Applied Sciences
issn 2076-3417
publishDate 2020-10-01
description In the flight control system, using an electro-hydrostatic actuator (EHA) instead of the currently used relatively mature electro-hydraulic valve-controlled actuator, there are three prevailing concerns, namely heating, size, and stiffness. This paper proposes a novel principle EHA, called active load-sensitive EHA (ALS-EHA), which can actively realize the adaptive adjustment of pump displacement with load pressure. Its principle analysis and mathematical modeling based on the direct load-sensitive EHA (DLS-EHA) configuration is done to obtain the relationship between motor current and hydraulic reduction ratio. Then, its stiffness characteristics are analyzed, especially the influence of hydraulic reduction ratio on impedance at low frequencies combined with investigating the power matching of ALS-EHA. A comparative experiment between the developed ALS-EHA and the EHA with fixed pump displacement and variable motor speed (EHA-FPVM) was carried out. The results reveal that the proposed ALS-EHA can reduce the motor heating and its displacement tracking error is smaller near zero speed owing to its higher impedance from the lower hydraulic reduction ratio under heavy load conditions.
topic electro-hydrostatic actuator (EHA)
active load-sensitive
stiffness
power matching
url https://www.mdpi.com/2076-3417/10/19/6978
work_keys_str_mv AT liganghuang activeloadsensitiveelectrohydrostaticactuatorformoreelectricaircraft
AT tianyu activeloadsensitiveelectrohydrostaticactuatorformoreelectricaircraft
AT zongxiajiao activeloadsensitiveelectrohydrostaticactuatorformoreelectricaircraft
AT yanpengli activeloadsensitiveelectrohydrostaticactuatorformoreelectricaircraft
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