ASD-STAN PREN 4533-004-2016 Aerospace series Fibre optic systems Handbook Part 004 Repair maintenance cleaning and inspection (Edition P 2).pdf
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1、ASD-STAN STANDARD NORME ASD-STAN ASD-STAN NORM prEN 4533-004 Edition P 2 April 2016 PUBLISHED BY THE AEROSPACE AND DEFENCE INDUSTRIES ASSOCIATION OF EUROPE - STANDARDIZATION Rue Montoyer 10 - 1000 Brussels - Tel. 32 2 775 8126 - Fax. 32 2 775 8131 - www.asd-stan.org ICS: Supersedes edition P 1 of Ap
2、ril 2005 and will supersede EN 4533-004:2006 Descriptors: ENGLISH VERSION Aerospace series Fibre optic systems Handbook Part 004: Repair, maintenance, cleaning and inspection Srie arospatiale Systmes des fibres optiques Manuel dutilisation Partie 004 : Rparation, maintenance, nettoyage et contrle Lu
3、ft- und Raumfahrt Faseroptische Systemtechnik Handbuch Teil 004: Reparatur, Wartung, Reinigung und Inspektion This “Aerospace Series“ Prestandard has been drawn up under the responsibility of ASD-STAN (The AeroSpace and Defence Industries Association of Europe - Standardization). It is published for
4、 the needs of the European Aerospace Industry. It has been technically approved by the experts of the concerned Domain following member comments. Subsequent to the publication of this Prestandard, the technical content shall not be changed to an extent that interchangeability is affected, physically
5、 or functionally, without re-identification of the standard. After examination and review by users and formal agreement of ASD-STAN, it will be submitted as a draft European Standard (prEN) to CEN (European Committee for Standardization) for formal vote and transformation to full European Standard (
6、EN). The CEN national members have then to implement the EN at national level by giving the EN the status of a national standard and by withdrawing any national standards conflicting with the EN. Edition approved for publication 1st April 2016 Comments should be sent within six months after the date
7、 of publication to ASD-STAN Electrical Domain Copyright 2016 by ASD-STAN prEN 4533-004:2016 (E) 2 EN 4533-004:2006 (E)Contents Page Foreword 2 Introduction .3 1 Scope 4 2 Normative references 4 3 Fault analysis .5 4 Repair techniques . 10 5 Inspection and cleaning . 12 6 Scheduled maintenance and in
8、spection 19 Annex A (normative) Termini end face contamination . 22 Annex B (normative) Cleaning Methods. 26 B.1 Method 1 26 B.1.1 Method 1a, cleaning sticks 26 B.1.2 Method 1b, semi-automated cartridge tape cleaner 26 B.2 Method 2 28 B.2.1 Method 2a, cleaning sticks 28 B.2.2 Method 2b, semi-automat
9、ed cartridge tape cleaner 28 Foreword This standard was reviewed by the Domain Technical Coordinator of ASD-STANs Electrical Domain. After inquiries and votes carried out in accordance with the rules of ASD-STAN defined in ASD-STANs General Process Manual, this standard has received approval for Pub
10、lication. prEN 4533-004:2016 (E) 3 Introduction a) The Handbook This handbook aims to provide general guidance for experts and non-experts alike in the area of designing, installing, and supporting fibre-optic systems on aircraft. Where appropriate more detailed sources of information are referenced
11、 throughout the text. It is arranged in 4 parts, which reflect key aspects of an optical harness life cycle, namely: Part 001: Termination methods and tools Part 002: Test and measurement Part 003: Looming and installation practices Part 004: Repair, maintenance, cleaning and inspection b) Backgroun
12、d It is widely accepted in the aerospace industry that photonic technology significant advantages over conventional electrical hardware. These include massive signal bandwidth capacity, electrical safety, and immunity of passive fibre-optic components to the problems associated with electromagnetic
13、interference (EMI). Significant weight savings can also be realized in comparison to electrical harnesses which may require heavy screening. To date, the EMI issue has been the critical driver for airborne fibre-optic communications systems because of the growing use of non-metallic aerostructures.
14、However, future avionic requirements are driving bandwidth specifications from 10s of Mbits/s into the multi-Gbits/s regime in some cases, i.e. beyond the limits of electrical interconnect technology. The properties of photonic technology can potentially be exploited to advantage in many avionic app
15、lications, such as video/sensor multiplexing, flight control signalling, electronic warfare, and entertainment systems, as well as in sensing many of the physical phenomena on-board aircraft. The basic optical interconnect fabric or optical harness is the key enabler for the successful introduction
16、of optical technology onto commercial and military aircraft. Compared to the mature telecommunications applications, an aircraft fibre-optic system needs to operate in a hostile environment (e.g. temperature extremes, humidity, vibration, and contamination) and accommodate additional physical restri
17、ctions imposed by the airframe (e.g. harness attachments, tight bend radii requirements, and bulkhead connections). Until recently, optical harnessing technology and associated practices were insufficiently developed to be applied without large safety margins. In addition, the international standard
18、s did not adequately cover many aspects of the life cycle. The lack of accepted standards thus lead to airframe specific hardware and support. These factors collectively carried a significant cost penalty (procurement and through-life costs), that often made an optical harness less competitive than
19、an electrical equivalent. This situation is changing with the adoption of more standardized (telecoms type) fibre types in aerospace cables and the availability of more ruggedized COTS components. These improved developments have been possible due to significant research collaboration between compon
20、ent and equipment manufacturers as well as the end use airframers. prEN 4533-004:2016 (E) 4 EN 4533-004:2006 (E)1 Scope The handbook gives guidelines related to Fault analysis and repair as well as maintenance and inspection of fibre optic links. The first deals with what to do when something goes w
21、rong how to go from a fault notification to locating the fault, and finally, repairing it. The second covers the recommended procedures for upkeep and maintaining harness health over the lifetime of its installation. 2 Normative references The following documents, in whole or in part, are normativel
22、y referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 4533-001, Aerospace series Fibre optic systems Handbook Part 001
23、: Termination methods and tools EN 4533-002, Aerospace series Fibre optic systems Handbook Part 002: Test and measurement EN 4533-003, Aerospace series Fibre optic systems Handbook Part 003: Looming and installation practices EN 2591-601, Aerospace series Elements of electrical and optical connectio
24、n Test methods Part 601: Optical elements Insertion loss EN 3733 (all parts), Aerospace series Connector, optical, circular, single channel, coupled by self-locking ring, operating temperature up to 150 C continuous EN 4531-101, Aerospace series Connectors, optical, circular, single and multipin, co
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