Talk:Electro-hydraulic actuator

This article is within the scope of the Aviation WikiProject. If you would like to participate, please visit the project page, where you can join the project and see lists of open tasks and task forces. To use this banner, please see the full instructions.AviationWikipedia:WikiProject AviationTemplate:WikiProject Aviationaviation articles

This article has not yet been checked against the criteria for B-class status:
Referencing and citation: not checked Coverage and accuracy: not checked Structure: not checked Grammar and style: not checked Supporting materials: not checked	To fill out this checklist, please add the following code to the template call: \| b1<!--Referencing and citation--> = <yes/no> \| b2<!--Coverage and accuracy --> = <yes/no> \| b3<!--Structure --> = <yes/no> \| b4<!--Grammar and style --> = <yes/no> \| b5<!--Supporting materials --> = <yes/no> assessing the article against each criterion.

This article is supported by the aircraft project.

A fact from Electro-hydraulic actuator appeared on Wikipedia's Main Page in the Did you know column on 6 August 2009 (check views). The text of the entry was as follows:

Did you know... that electro-hydrostatic actuators can replace the hydraulic plumbing of an aircraft with electrical wiring, leading to a "power-by-wire" design?

A record of the entry may be seen at Wikipedia:Recent additions/2009/August.

Wikipedia

Electro-hydrostatic actuators EHAs are not the latest technology

EHAs are not the latest technology

C. W. Helsley, Jr., "Power By Wire for Aircraft - the All-Electric Airplane", SAE, #771006, February 1977this shows the hydraulics have been eliminated and a new section or connection to linear actuator should be made. Electro-hydrostatic actuators (EHAs)are not the latest technology

Wdl1961 (talk) 01:17, 7 August 2009 (UTC)[reply]

quote ""mechanical servo-power package (MSPP) to these functions will meet the power and frequency response requirements, and will save additional weight. The MSPP consists of an electric motor, an adapter gearbox, a flywheel, a mechanical controller, and a mechanical hinge. ""

Wdl1961 (talk) 01:47, 7 August 2009 (UTC)[reply]

Hydraulic vs. Hydrostatic

Why is the title of the article "Electro-hydraulic actuator" when it describes only what an "Electro-hydrostatic actuator" is?

I'm pretty sure that hydraulic and hydrostatic are not synonyms. Shouldn't we change the article name and, more importantly, write a paragraph explaining the difference between electro-hydraulic actuators and electro-hydrostatic actuators? — Preceding unsigned comment added by 91.13.28.133 (talk) 20:29, 25 May 2016 (UTC)[reply]

Hydraulic commonly is a synonym for hydrostatic. Also I'm unaware of any hydrokinetic counter-examples to this. Andy Dingley (talk) 19:05, 30 October 2018 (UTC)[reply]

The first post in entirely correct, and the second post wrong. There are fundamental differences between hydraulic and hydrostatic actuator technologies. The entire article requires re-writing. The following links would be very helpful:

Electrohydraulic_servo_valve

https://www.moog.com/products/actuators-servoactuators/actuation-technologies/electrohydrostatic.html

https://www.hydraulicspneumatics.com/cylinders-actuators/electrohydrostatic-actuation-energy-efficient-option

https://r.search.yahoo.com/_ylt=Awr9Dt.6m5VdQcwAdHZXNyoA;_ylu=X3oDMTByNDZ0aWFxBGNvbG8DZ3ExBHBvcwM2BHZ0aWQDBHNlYwNzcg--/RV=2/RE=1570114618/RO=10/RU=https%3a%2f%2fpdfs.semanticscholar.org%2f4efa%2f883f7af8d08acb314ba6e5dbc7af8f9ec476.pdf/RK=2/RS=zZFN.u2bnPQImif_NakQLQy4kKc-

https://web.archive.org/web/20080517035145/http://www.yf.com/actuation_electrohydrostatic.cfm

200.68.142.20 (talk) 07:18, 3 October 2019 (UTC) baden k.[reply]

Response time of EHAs

I suggest adding details about the response time of the actuators and the systems that use them.

Also, it might be good to link to a description of the technology used in the actuators. Pneurd (talk) 12:17, 28 January 2018 (UTC)[reply]

Stepper motors?

Why does this article claim, "The primary development that lead to the possibility of EHAs was the precision feedback controlled conventional motor, or high-power stepper motor." I know of no use for stepper motors here, nor how they'd even be used. The purpose of an electro-hydraulic system (the topic of this article) is that a relatively simple electric motor provides the power, the precision comes from hydraulic valves. There's just no need for an electrical positioning system such as a stepper, torque motor or similar. Nor does the cited reference support this. Andy Dingley (talk) 19:04, 30 October 2018 (UTC)[reply]