ISO 5344-2004 Electrodynamic vibration generating systems - Performance characteristics《电动振动产生设备 性能特性》.pdf

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1、 Reference number ISO 5344:2004(E) ISO 2004INTERNATIONAL STANDARD ISO 5344 Second edition 2004-07-01 Electrodynamic vibration generating systems Performance characteristics Systmes lectrodynamiques utiliss pour la gnration de vibrations Caractristiques de performance ISO 5344:2004(E) PDF disclaimer

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4、; 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 relating to it is found, please inform the Central Secretariat at the address given below. ISO 2004 All rights r

5、eserved. 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, without permission in writing from either ISO at the address below or ISOs member body in the country of the req

6、uester. 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 2004 All rights reservedISO 5344:2004(E) ISO 2004 All rights reserved iiiContents Page Foreword iv Introduction v 1 Scop

7、e 1 2 Normative references . 1 3 Terms and definitions. 2 4 Structure of this International Standard. 6 4.1 General. 6 4.2 Subclause coding . 6 4.3 Symbol coding 7 5 Systems 7 5.1 General. 7 5.2 System specifications (S,a) 7 5.3 System performance. 8 5.4 Calculated system performance 9 6 Electrodyna

8、mic vibration generators . 10 6.1 Vibration generator specification (C,a). 10 6.2 Vibration generator performance 11 6.3 Vibrator drive requirements. 12 6.4 Vibrator maintenance (A,a) 15 7 Power amplifiers . 15 7.1 Amplifier specification (C,a). 15 7.2 Amplifier test loads. 16 7.3 Amplifier performa

9、nce 17 7.4 Amplifier maintenance (A,a). 19 8 Tests and measurements. 19 8.1 General. 19 8.2 Conditioning before data runs. 19 8.3 Endurance tests 20 8.4 Spill-over limits . 21 8.5 Distortion tests 22 8.6 Impulse generation . 24 Annex A (informative) Additional equipment characteristics 25 ISO 5344:2

10、004(E) iv ISO 2004 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 technical committees. Each member body

11、 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 Electrotec

12、hnical 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

13、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 righ

14、ts. ISO shall not be held responsible for identifying any or all such patent rights. ISO 5344 was prepared by Technical Committee ISO/TC 108, Mechanical vibration and shock, Subcommittee SC 6, Vibration and shock generating systems. This second edition cancels and replaces the first edition (ISO 534

15、4:1980), which has been technically revised. Considered responses to all of the proposed substantive changes to ISO 5344:1980 are incorporated in this second edition. Changes favouring the specific design of individual sources were rejected. Regarding endurance testing, a compromise is incorporated,

16、 providing a less expensive, but hopefully adequate, assurance of reliability. ISO 5344:2004(E) ISO 2004 All rights reserved vIntroduction Users want their equipment to operate for long period without malfunction. A major purpose of this International Standard is to establish procedures to measure p

17、erformance and to provide ways to ensure the reliability of electrodynamic vibration generation equipment and systems. Some assurance of reliability, but not conclusive, is provided by endurance tests on the vibrator, amplifier and the system as a whole. If all sources of electrodynamic vibration ge

18、neration equipment and systems use the same procedures, these procedures define the meanings of the performance statements and reliability statements. Comparisons of the performance and reliability statements of the different sources become useful. Many of these procedures are suitable for incorpora

19、tion in a purchase specification to state the acceptance testing to be carried out upon delivery. Others, particularly those related to endurance testing, are lengthy and expensive, and typically are performed by the source at the end of the product development process, before the start of series pr

20、oduction. These procedures typically are used to establish and confirm the rated performance stated in the sales literature. After discussions with the proposed sources, the writer of the purchase specification may propose abbreviated procedures for equipment acceptance testing, or alternatively, ma

21、y propose to accept written assurances that the full procedures have been performed by the source with mutually satisfactory results. INTERNATIONAL STANDARD ISO 5344:2004(E) ISO 2004 All rights reserved 1Electrodynamic vibration generating systems Performance characteristics 1 Scope This Internation

22、al Standard specifies the performance characteristics and performance test conditions for electrodynamic vibration generator systems and provides a list of additional equipment characteristics (see Annex A) that can be declared by the equipment manufacturer. This information can be used by the user

23、or the writer of specifications for equipment for the selection of such a system, taking into account its application. This International Standard establishes procedures for calculating the system performance of a system comprising an amplifier from one source and a vibrator from a different source.

24、 Such a calculated system performance is less precise than performance measured on a system comprising the actual vibrator and amplifier, and a reserve of calculated force is recommended. It can be desirable to specify separately the acquisition of needed vibrator and/or amplifier interface data, pa

25、rticularly if a vibrator or amplifier is to be acquired to add to an existing installation. It can also be desirable to specify the responsibility for the calculation of performance. This International Standard is applicable to equipment producing sine, random and impulse rectilinear vibration. It i

26、s implied that all systems are usable for sine testing at least at a low level, since sine capability is needed for specimen response evaluation and transfer function measurements for random and impulse testing. When random capability is specified, it is implied that some sine capability is also ava

27、ilable. Similarly, when impulse capability is specified, it is implied that some sine, but not necessarily random, capability is available. NOTE Three groups of people are expected to use this International Standard: the supplier of the equipment, the purchaser of the equipment, and the organization

28、 that tests the equipment. The supplier of the equipment states that “rated” performance is available, typically as stated in sales literature. The purchaser states the “specified” performance of the equipment that he will accept, typically less than or equal to the rated performance. The test organ

29、ization “provides” the results of its tests and observations, typically by a written report, which may include the conditions and accuracy of each measurement, and illustrations such as waveforms, performance graphs and tables of values. 2 Normative references The following referenced documents are

30、indispensable for the application of 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 2041:1990, Vibration and shock Vocabulary ISO 15261, Vibration and shock generating

31、systems Vocabulary ISO 5344:2004(E) 2 ISO 2004 All rights reserved3 Terms and definitions For the purposes of this document, the terms and definitions given in ISO 2041, ISO 15261 and the following apply. 3.1 electrodynamic vibration generator vibrator vibration generator which derives its vibratory

32、 force from the interaction of a magnetic field of constant value, and a coil of wire contained in it which is excited by a suitable alternating current ISO 2041:1990 NOTE 1 Unless specifically restricted to the moving element, body and base of the vibrator machine, this includes the flexible field,

33、 control and drive cables, coolant hoses, field supply, and cooling, demagnetizing, protective and safety systems. NOTE 2 In this International Standard, the subscript “ v ” is used to indicate vibrator, short for electrodynamic vibration generator. The word vibrator, which has the same meaning, is

34、the term commonly used in industry. 3.2 power amplifier amplifier power electronic device capable of providing the voltage and current used to drive the vibrator NOTE Unless otherwise specified, this includes the cooling, protective and safety systems. 3.3 system combination of a power amplifier and

35、 an electrodynamic vibration generator to provide vibratory force NOTE The following are excluded from this International Standard, but are included in the more inclusive electrodynamic vibration test facility system: the input signal source and control (typically providing controlled sinusoidal, ra

36、ndom or shock simulation signals); specimen mounting fixtures and auxiliary tables; measuring instrumentation (e.g. accelerometers and conditioning and analysis electronics); mains electrical power cables and coolant hoses, or piping to and between the power amplifier, vibrator field supply, and vib

37、rator and amplifier cooling supplies; air conditioning to remove generated heat not removed by the cooling systems; a vibration-isolated inertia block to inhibit the transmission of vibratory forces from the vibrator to the surroundings. 3.4 equipment source source supplier of the equipment being ac

38、quired or to be used in the system NOTE 1 When a system is purchased from a single source, that source usually is the manufacturer or his agent. When the components of a system are being purchased from more than one source, the sources are usually the manufacturers of the individual components or th

39、eir agents. When an organization wishes to acquire a new component (e.g. a switching amplifier) to be combined with an existing component (e.g. a vibrator in the test laboratory of the organization), the source of the vibrator is the vibration test laboratory. NOTE 2 The vibration test laboratory, o

40、r other similar non-commercial source, may have difficulty acquiring the data needed to assure that the resulting system achieves the desired system specifications. ISO 5344:2004(E) ISO 2004 All rights reserved 33.5 drive coil component of the electrodynamic vibration generator, designed to provide,

41、 by means of interaction between the alternative current in the drive coil and the static magnetic field, the vibratory force proportional to the drive coil current NOTE For most electrodynamic vibration generators, the drive coil is attached to the moving element. For transformer coupled vibrators,

42、 the drive coil is stationary and is coupled by transformer action to a shorted ring on the moving element. 3.6 linear power amplifier power amplifier having an output proportional to the input NOTE 1 Typically, the large linear power amplifiers designed to drive vibrators have low distortion (0,1 %

43、 to 0,3 %) when they are new or well maintained, but have high internal power dissipation, so necessitate a way of disposing of the excess heat, and are more expensive than switching power amplifiers. NOTE 2 Small vibrators are sometimes driven by linear audio-power amplifiers or arrays of linear au

44、dio-power amplifiers. Moderately priced units typically have 0,1 % distortion, and higher performance and price units are available with 0,01 % distortion. 3.7 switching power amplifier power amplifier having an output that switches alternately between a negative value and a positive value at a high

45、 frequency NOTE 1 If the output is positive for a greater fraction of the high frequency cycle than it is negative, the mean output is positive. Filtering, including the effects of the drive coil inductance and the moving mass, serves to smooth the current through the drive coil. The technique resul

46、ts in low internal power dissipation. Switching power amplifiers typically are smaller and less expensive than linear power amplifiers of the same output capability, but may have higher distortion. NOTE 2 The earlier switching power amplifiers used to drive vibrators had switching frequencies around

47、 40 kHz and distortions of about 5 % to 15 %. Modern switching power amplifiers are available with switching frequencies of about 150 kHz and distortion of about 1,5 % to 5 %. As faster switching transistors become available, higher switching frequencies will be possible, and the distortion will be

48、reduced further. When switching frequencies reach the megahertz region, substantial feedback around the output stage is possible, and the switching amplifier distortion will reach the 0,1 % to 0,3 % range of the linear power amplifiers. 3.8 force vibratory force resulting from a varying current, in

49、a steady magnetic field, which is applied to the structure of the moving element and the attached specimen NOTE Due to losses, resonances and travel limitations, not all of this force is available to accelerate the moving element and attached specimen and/or to deflect the moving element suspension springs. The magnitude of the force is defined by the resulting acceleration: ( ) et F mma =+ where e m and t m are the masses of the moving element and attached load, respectively, and a is the resulting acceleration. This definitio