Aerospace — Fluid systems — Vocabulary — Part 4: General terms and definitions relating to control/actuation systems

ISO 8625-4:2011 defines general terms relating to control/actuation systems in the field of aerospace fluid systems and components.

Aéronautique et espace — Systèmes de fluides — Vocabulaire — Partie 4: Termes et définitions généraux relatifs aux systèmes de commande/d'actionnement

General Information

Status
Published
Publication Date
17-Oct-2011
Current Stage
9093 - International Standard confirmed
Completion Date
14-Nov-2023
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ISO 8625-4:2011 - Aerospace -- Fluid systems -- Vocabulary
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INTERNATIONAL ISO
STANDARD 8625-4
First edition
2011-10-15

Aerospace — Fluid systems —
Vocabulary —
Part 4:
General terms and definitions relating to
control/actuation systems
Aéronautique et espace — Systèmes de fluides — Vocabulaire —
Partie 4: Termes et définitions généraux relatifs aux systèmes de
commande/d'actionnement




Reference number
ISO 8625-4:2011(E)
©
ISO 2011

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ISO 8625-4:2011(E)

COPYRIGHT PROTECTED DOCUMENT


©  ISO 2011
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means,
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ii © ISO 2011 – All rights reserved

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ISO 8625-4:2011(E)
Contents Page
Foreword . iv
Introduction . v
Scope . 1
Terms and definitions . 1
4.1  Control system classification . 1
4.2  Control system technology (control engineering) . 3
4.3  Control system performance (servomechanism) . 9

© ISO 2011 – All rights reserved iii

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ISO 8625-4:2011(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 8625-4 was prepared by Technical Committee ISO/TC 20, Aircraft and space vehicles, Subcommittee
SC 10, Aerospace fluid systems and components.
ISO 8625 consists of the following parts, under the general title Aerospace — Fluid systems — Vocabulary:
 Part 1: General terms and definitions relating to pressure
 Part 2: General terms and definitions relating to flow
 Part 3: General terms and definitions relating to temperature
 Part 4: General terms and definitions relating to control/actuation systems
iv © ISO 2011 – All rights reserved

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ISO 8625-4:2011(E)
Introduction
ISO 8625 contains only those terms which can be applied to general equipment and systems. Terms which
are only used for specific applications and specific components are to be incorporated into the relevant
product specifications and product standards.
Terms and definitions for components and systems which are associated with other systems (such as
electromechanical actuation systems or electronic control units) are incorporated only on a very general basis,
provided they have direct interfaces with fluid systems.

© ISO 2011 – All rights reserved v

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INTERNATIONAL STANDARD ISO 8625-4:2011(E)

Aerospace — Fluid systems — Vocabulary —
Part 4:
General terms a
...

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