Fault tolerant EHA architectures

Author

Sadeghi, Tom ; Lyons, Arthur

Author_Institution

Watson Sch. of Eng., State Univ. of New York, Binghamton, NY, USA

Volume

7

Issue

3

fYear

1992

fDate

3/1/1992 12:00:00 AM

Firstpage

32

Lastpage

42

Abstract

Fault-tolerant electrohydrostatic actuator (EHA) architectures have been defined and evaluated for future military aircraft applications. The fault tolerances of these EHA architectures have been measured in terms of mission success probability and safety reliability. The functional level failure modes of an EHA and its interfacing equipment are used to analyze the required levels of redundancy and fault coverage for satisfying MIL-F-9490 probability of loss of control (PLOC), MIL-F-9490 probability of mission abort (PMA), and MIL-STD 882B fail-operational/fail-operational redundancy requirements. The study is concluded by estimating and comparing fault tolerance, performance, and weight of candidate EHA architectures. The results are summarized in a comparison matrix which may be used to select a preferred architecture for a given application.<>

Keywords

actuators; aerospace computer control; aircraft control; electrohydraulic control equipment; failure analysis; fault tolerant computing; military computing; probability; redundancy; MIL-F-9490 probability of loss of control; MIL-F-9490 probability of mission abort; MIL-STD 882B fail-operational/fail-operational redundancy; comparison matrix; computer architecture; electrohydrostatic actuator; fault coverage; fault tolerances; military aircraft; mission success probability; redundancy; safety reliability; Actuators; Aerospace control; Aerospace electronics; Communication system control; Control systems; Fault tolerance; Fluid dynamics; Military aircraft; Redundancy; Safety;

fLanguage

English

Journal_Title

Aerospace and Electronic Systems Magazine, IEEE

Publisher

ieee

ISSN

0885-8985

Type

jour

DOI

10.1109/62.141899

Filename

141899