BS-ISO-14839-3-2006.pdf
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1、BRITISH STANDARD BS ISO 14839-3:2006 Mechanical vibration Vibration of rotating machinery equipped with active magnetic bearings Part 3: Evaluation of stability margin ICS 17.160 ? Licensed Copy: London South Bank University, London South Bank University, Thu Mar 01 06:58:21 GMT+00:00 2007, Uncontro
2、lled Copy, (c) BSI BS ISO 14839-3:2006 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 28 February 2007 BSI 2007 ISBN 978 0 580 50150 0 National foreword This British Standard was published by BSI. It is the UK implementation of ISO 14839-3:2
3、006. The UK participation in its preparation was entrusted by Technical Committee GME/21, Mechanical vibration, shock and condition monitoring, to Subcommittee GME/21/5, Vibration of machines. A list of organizations represented on GME/21/5 can be obtained on request to its secretary. This publicati
4、on does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard cannot confer immunity from legal obligations. Amendments issued since publication Amd. No. DateComments Licensed Copy: London South Bank U
5、niversity, London South Bank University, Thu Mar 01 06:58:21 GMT+00:00 2007, Uncontrolled Copy, (c) BSI Reference number ISO 14839-3:2006(E) INTERNATIONAL STANDARD ISO 14839-3 First edition 2006-09-15 Mechanical vibration Vibration of rotating machinery equipped with active magnetic bearings Part 3:
6、 Evaluation of stability margin Vibrations mcaniques Vibrations de machines rotatives quipes de paliers magntiques actifs Partie 3: valuation de la marge de stabilit BS ISO 14839-3:2006 Licensed Copy: London South Bank University, London South Bank University, Thu Mar 01 06:58:21 GMT+00:00 2007, Unc
7、ontrolled Copy, (c) BSI ii Licensed Copy: London South Bank University, London South Bank University, Thu Mar 01 06:58:21 GMT+00:00 2007, Uncontrolled Copy, (c) BSI iii Contents Page Foreword iv Introduction v 1 Scope . 1 2 Normative references. 1 3 Preceding investigation . 1 4 Outline of feedback
8、control systems 2 5 Measurement procedures 9 6 Evaluation criteria. 11 Annex A (informative) Case study 1 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) Analyti
9、cal prediction of the system stability. 32 Annex E (informative) Matrix open loop used for a MIMO system 33 Bibliography. 35 BS ISO 14839-3:2006 Licensed Copy: London South Bank University, London South Bank University, Thu Mar 01 06:58:21 GMT+00:00 2007, Uncontrolled Copy, (c) BSI iv Foreword ISO (
10、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 commi
11、ttee 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 electrotec
12、hnical 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 membe
13、r 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 identifyin
14、g 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 applied to machines, vehicles and structures. ISO 14839 consists of the following parts, und
15、er 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 parts are currently in preparation. BS ISO 14839-3:2006 Licensed Copy: London South B
16、ank University, London South Bank University, Thu Mar 01 06:58:21 GMT+00:00 2007, Uncontrolled Copy, (c) BSI 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 resulti
17、ng from static magnetic 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
18、system is required to constitute 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 1
19、4839, the objectives of 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 contr
20、act concerns, commission 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. BS ISO 14839-3:2006 Licensed Copy: London South Bank University, London South Bank University, Thu Mar 01 06:58:21 GMT
21、+00:00 2007, Uncontrolled Copy, (c) BSI Licensed Copy: London South Bank University, London South Bank University, Thu Mar 01 06:58:21 GMT+00:00 2007, Uncontrolled Copy, (c) BSI 1 Mechanical vibration Vibration of rotating machinery equipped with active magnetic bearings Part 3: Evaluation of stabil
22、ity 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 this index. It is applicable to industrial rotating
23、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 addressed. This part of ISO 14839 concerns the system stabil
24、ity 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 purchaser and vendor. This part of ISO 14839 does not addre
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