SAE ARP4493A
Current
The latest, up-to-date edition.
1 SCOPE
2 REFERENCES
3 RECOMMENDED TERMINOLOGY
4 PROCUREMENT SPECIFICATION
5 RECOMMENDED TEST METHODS
APPENDIX A - SAMPLE SPECIFICATION - DIRECT DRIVE VALVE
(DDV) FLOW CONTROL
This SAE Aerospace Recommended Practice (ARP) is intended as a guide to aid in the specification and testing of Direct Drive Servovalves, but does not include the associated electronic controller.
DocumentType |
Standard
|
PublisherName |
SAE International
|
Status |
Current
|
Supersedes |
This SAE Aerospace Recommended Practice (ARP) is intended as a guide to aid in the specification and testing of Direct Drive Servovalves, but does not include the associated electronic controller.The recommendations contained in this ARP are primarily confined to the input and output characteristics of Direct Drive Servovalves (DDV). The only exception to this approach involves the definition and specification of chip shear force, which is not typically measurable by nondestructive external testing. The information presented should be useful in standardizing the terminology, the specification of physical and performance parameters, and the test procedures used in conjunction with these components.Direct drive servovalves are of two basic types: open loop and closed loop. In the case of open loop direct drive servovalves, the significant input is the motor current as is the case with electrohydraulic servovalves covered in ARP490. A closed loop direct drive servovalve includes a means of position feedback and relies on an electronic controller to control its performance characteristics. Because of the importance of the closed loop category of DDVs, many specifications will be written for the closed loop performance. To generalize this document, the system input signal has been referred to as the \"command\" and applies equally well to open loop valves, in which the command will usually be expressed in amps, and to closed loop valves which usually receive commands as an input voltage to the valve controller. Many provisions of this document apply equally to larger tandem Main Control Valve (MCV) type DDVs as well as standard size single hydraulic system valves.The specifications contained herein should be used to describe direct drive flow control servovalves. Additional specifications may be necessary to define special requirements for specific control systems. Also, specialized test procedures may be necessary to measure DDV performance in these unusual specification areas. These considerations are beyond the scope of this recommended practice.
SAE ARP 1281 : 2002 | ACTUATORS: AIRCRAFT FLIGHT CONTROLS, POWER OPERATED, HYDRAULIC, GENERAL SPECIFICATION FOR |
SAE ARP4386D | Terminology and Definitions for Aerospace Fluid Power, Actuation and Control Technologies |
SAE ARP94910 | Aerospace - Vehicle Management Systems - Flight Control Design, Installation and Test of, Military Unmanned Aircraft, Specification Guide For |
SAE ARP6154 | Aerospace Fluid Power Electrohydrostatic Module, Design, Performance and Test Recommendations |
SAE AS94900 | Aerospace - Flight Control Systems - Design, Installation and Test of Piloted Military Aircraft, General Specification For |
SAE AS4536C | Safety Cable Kit Procurement Specification and Requirement for Use |
SAE ARP 1281 : 2002 | ACTUATORS: AIRCRAFT FLIGHT CONTROLS, POWER OPERATED, HYDRAULIC, GENERAL SPECIFICATION FOR |
SAE AS5440A | Hydraulic Systems, Military Aircraft, Design and Installation, Requirements For |
MIL-PRF-87257 Revision C:2017 | HYDRAULIC FLUID, FIRE RESISTANT, LOW TEMPERATURE, SYNTHETIC HYDROCARBON BASE, AIRCRAFT AND MISSILE |
NASM33540:2003 | SAFETY WIRING, SAFETY CABLING, COTTER PINNING, GENERAL PRACTICES FOR |
SAE J2470_200901 | Hydraulic Fluid Power—Valves—Method for Assessing the Lock Sensitivity to Contaminants |
SAE AS1241D | Fire Resistant Phosphate Ester Hydraulic Fluid for Aircraft |
MIL-PRF-83282 Revision D:1997 | HYDRAULIC FLUID, FIRE RESISTANT, SYNTHETIC HYDROCARBON BASE, METRIC, NATO CODE NUMBER H-537 |
SAE AS 4059F : 2013 | AEROSPACE FLUID POWER - CONTAMINATION CLASSIFICATION FOR HYDRAULIC FLUIDS |
SAE ARP4386C | Terminology and Definitions for Aerospace Fluid Power, Actuation and Control Technologies |
SAE AS4941B | Aerospace - General Requirements for Commercial Aircraft Hydraulic Components |
SAE ARP 1383 : 2013 | AEROSPACE - IMPULSE TESTING OF HYDRAULIC COMPONENTS |
SAE ARP490F | Electrohydraulic Servovalves |
Access your standards online with a subscription
Features
-
Simple online access to standards, technical information and regulations.
-
Critical updates of standards and customisable alerts and notifications.
-
Multi-user online standards collection: secure, flexible and cost effective.
Logging out.