ISO 14839-3-2006 Mechanical vibration - Vibration of rotating machinery equipped with active magnetic bearings - Part 3 Evaluation of stability margin《机械振动 装配有主.pdf
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1、 Reference number ISO 14839-3:2006(E) ISO 2006INTERNATIONAL STANDARD ISO 14839-3 First edition 2006-09-15 Mechanical vibration Vibration of rotating machinery equipped with active magnetic bearings Part 3: Evaluation of stability margin Vibrations mcaniques Vibrations de machines rotatives quipes de
2、 paliers magntiques actifs Partie 3: valuation de la marge de stabilit ISO 14839-3:2006(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobes licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are l
3、icensed to and installed on the computer performing the editing. In downloading this file, parties accept therein the responsibility of not infringing Adobes licensing policy. The ISO Central Secretariat accepts no liability in this area. Adobe is a trademark of Adobe Systems Incorporated. Details o
4、f the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In the unlikely event that a problem relati
5、ng to it is found, please inform the Central Secretariat at the address given below. ISO 2006 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, withou
6、t permission in writing from either ISO at the address below or ISOs member body in the country of the requester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2006 All right
7、s reservedISO 14839-3:2006(E) ISO 2006 All rights reserved iii Contents Page Foreword iv Introduction v 1 Scope . 1 2 Normative references . 1 3 Preceding investigation . 1 4 Outline of feedback control systems 2 5 Measurement procedures 9 6 Evaluation criteria. 11 Annex A (informative) Case study 1
8、 on evaluation of stability margin 13 Annex B (informative) Case study 2 on evaluation of stability margin 25 Annex C (informative) Field data of stability margin 28 Annex D (informative) Analytical prediction of the system stability. 32 Annex E (informative) Matrix open loop used for a MIMO system
9、33 Bibliography . 35 ISO 14839-3:2006(E) iv ISO 2006 All rights reservedForeword 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 tech
10、nical 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
11、 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 I
12、nternational 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
13、 may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 14839-3 was prepared by Technical Committee ISO/TC 108, Mechanical vibration and shock, Subcommittee SC 2, Measurement and evaluation of mechanical vibration and shock as applie
14、d to machines, vehicles and structures. ISO 14839 consists of the following parts, under the general title Mechanical vibration Vibration of rotating machinery equipped with active magnetic bearings: Part 1: Vocabulary Part 2: Evaluation of vibration Part 3: Evaluation of stability margin Additional
15、 parts are currently in preparation. ISO 14839-3:2006(E) ISO 2006 All rights reserved v Introduction While passive bearings, e.g. ball bearings or oil-film bearings, are essentially stable systems, magnetic bearings are inherently unstable due to the negative stiffness resulting from static magnetic
16、 forces. Therefore, a feedback control is required to provide positive stiffness and positive damping so that the active magnetic bearing (AMB) operates in a stable equilibrium to maintain the rotor at a centred position. A combination of electromagnets and a feedback control system is required to c
17、onstitute an operable AMB system. In addition to ISO 14839-2 on evaluation of vibration of the AMB rotor systems, evaluation of the stability and its margin is necessary for safe and reliable operation of the AMB rotor system; this evaluation is specified in this part of ISO 14839, the objectives of
18、 which are as follows: a) to provide information on the stability margin for mutual understanding between vendors and users, mechanical engineers and electrical engineers, etc.; b) to provide an evaluation method for the stability margin that can be useful in simplifying contract concerns, commissio
19、n and maintenance; c) to serve and collect industry consensus on the requirements of system stability as a design and operating guide for AMB equipped rotors. INTERNATIONAL STANDARD ISO 14839-3:2006(E) ISO 2006 All rights reserved 1 Mechanical vibration Vibration of rotating machinery equipped with
20、active magnetic bearings Part 3: Evaluation of stability margin 1 Scope This part of ISO 14839 establishes the stability requirements of rotating machinery equipped with active magnetic bearings (AMB). It specifies a particular index to evaluate the stability margin and delineates the measurement of
21、 this index. It is applicable to industrial rotating machines operating at nominal power greater than 15 kW, and not limited by size or operational rated speed. It covers both rigid AMB rotors and flexible AMB rotors. Small-scale rotors, such as turbo molecular pumps, spindles, etc., are not address
22、ed. This part of ISO 14839 concerns the system stability measured during normal steady-state operation in-house and/or on-site. The in-house evaluation is an absolute requirement for shipping of the equipment, while the execution of on-site evaluation depends upon mutual agreement between the purcha
23、ser and vendor. This part of ISO 14839 does not address resonance vibration appearing when passing critical speeds. The regulation of resonance vibration at critical speeds is established in ISO 10814. 2 Normative references The following referenced documents are indispensable for the application of
24、 this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 10814, Mechanical vibration Susceptibility and sensitivity of machines to unbalance 3 Preceding investigation The AMB ro
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