Standard:

• ARP988

Reaffirmed:

• 1992-06-01

Revised:

• 1972-06-01

Revision:

• Historical. Access the latest revision: ARP988A

Issuing:

• A-6b1 Hydraulic Servo Actuation Committee

Scope:

This recommended practice is intended as a guide for the specification of electrohydraulic mechanical feedback servoactuators used for position control. The recommendations contained herein are confined to the input and output characteristics of electrohydraulic mechanical feedback servoactuators. The information presented should be useful for standardizing the terminology and for specification of physical and performance parameters. The recommendations do not restrict nor attempt to define the internal design characteristics of servoactuators. As such, the material is equally applicable to servoactuators having different internal functioning, different ratings, different physical size, etc. In certain instances, standards for actuator design are recommended to increase interchangeability as, for example, pigtail color-coding and actuator polarity. The specifications contained herein should be adequate to describe electrohydraulic mechanical feedback servoactuators used for position control systems. Certain dynamic compensation methods will be discussed.

History:

Standard	Published	Revision	Status
ARP988A	2003-10-14	Latest	Revised
ARP988	1972-06-01	Historical	Reaffirmed

AKA:

• SAE ARP 988

Sector:

• Aerospace

Topic:

• Hydraulic systems