EN 16603-32-11:2014
(Main)Space engineering - Modal survey assessment
Space engineering - Modal survey assessment
This Standard specifies the basic requirements to be imposed on the performance and assessment of modal survey tests in space programmes. It defines the terminology for the activities involved and includes provisions for the requirement implementation.
This Standard specifies the tasks to be performed when preparing, executing and evaluating a modal survey test, in order to ensure that the objectives of the test are satisfied and valid data is obtained to identify the dynamic characteristics of the test article.
This standard may be tailored for the specific characteristics and constrains of a space project in conformance with ECSS-S-ST-00.
Raumfahrttechnik - Modale Prüfungsbewertung
Ingénierie spatiale - Evaluation des modes vibratoires
Vesoljska tehnika - Ocenjevanje modalnega pregleda
Standard EN 16603-32-11 določa osnovne zahteve za učinkovitost in ocenjevanje modalnega pregleda na področju vesoljskih programov. Določa terminologijo za zajete dejavnosti in vključuje določbe za izvajanje zahtev. Ta standard določa naloge, ki jih je treba opraviti pri pripravi, izvedbi in vrednotenju ocenjevanja modalnega pregleda, da bi zagotovili, da so cilji preskusa izpolnjeni in da so pridobljeni veljavni podatki za identifikacijo dinamičnih značilnosti preskusnih izdelkov. Ta standard se lahko prilagodi posameznim lastnostim in omejitvam vesoljskega projekta v skladu s standardom ECSS-S-ST-00.
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
01-november-2014
Vesoljska tehnika - Ocenjevanje modalnega pregleda
Space engineering - Modal survey assessment
Raumfahrttechnik - Modale Prüfungsbewertung
Ingénierie spatiale - Evaluation des modes vibratoires
Ta slovenski standard je istoveten z: EN 16603-32-11:2014
ICS:
49.140 Vesoljski sistemi in operacije Space systems and
operations
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD
EN 16603-32-11
NORME EUROPÉENNE
EUROPÄISCHE NORM
August 2014
ICS 49.140
English version
Space engineering - Modal survey assessment
Ingénierie spatiale - Evaluation des modes vibratoires Raumfahrttechnik - Modale Prüfungsbewertung
This European Standard was approved by CEN on 23 February 2014.
CEN and CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving
this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning
such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN and CENELEC
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CEN and CENELEC member into its own language and notified to the CEN-CENELEC Management Centre
has the same status as the official versions.
CEN and CENELEC members are the national standards bodies and national electrotechnical committees of Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece,
Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia,
Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.
CEN-CENELEC Management Centre:
Avenue Marnix 17, B-1000 Brussels
© 2014 CEN/CENELEC All rights of exploitation in any form and by any means reserved Ref. No. EN 16603-32-11:2014 E
worldwide for CEN national Members and for CENELEC
Members.
Table of contents
Foreword . 5
1 Scope . 6
2 Normative references . 7
3 Terms, definitions and abbreviated terms . 8
3.1 Terms from other standards . 8
3.2 Terms specific to the present standard . 8
3.3 Abbreviated terms. 22
3.4 Notation . 23
4 General objectives and requirements . 25
4.1 Modal survey test objectives . 25
4.1.1 Overview . 25
4.1.2 General . 25
4.1.3 Verification of design frequency . 25
4.1.4 Mathematical model validation . 26
4.1.5 Troubleshooting vibration problems . 26
4.1.6 Verification of design modifications . 26
4.1.7 Failure detection . 27
4.2 Modal survey test general requirements . 27
4.2.1 Test set-up . 27
4.2.2 Boundary conditions . 28
4.2.3 Environmental conditions . 28
4.2.4 Test facility certification . 28
4.2.5 Safety. 29
4.2.6 Test success criteria . 29
5 Modal survey test procedures . 31
5.1 General . 31
5.2 Test planning . 31
5.2.1 Test planning . 31
5.2.2 Pre-test activities . 33
5.2.3 Test activities . 33
5.2.4 Post-test activities . 34
5.3 Test set-up . 34
5.3.1 Definition of the test set-up . 34
5.3.2 Test boundary conditions . 34
5.3.3 Test instrumentation . 36
5.3.4 Excitation plan . 37
5.3.5 Test hardware and software . 38
5.4 Test performance. 38
5.4.1 Test . 38
5.4.2 Excitation system . 38
5.4.3 Excitation signal . 39
5.4.4 Linearity and structural integrity. 40
5.4.5 Measurement errors . 40
5.5 Modal identification methods . 41
5.6 Modal parameter estimation methods . 42
5.7 Test data . 42
5.7.1 Quality checks . 42
5.7.2 Generalized parameters . 44
5.7.3 Effective masses . 44
5.7.4 Data storage and delivery . 45
5.8 Test-analysis correlation . 46
5.8.1 Purpose . 46
5.8.2 Criteria for mathematical model quality . 47
6 Pre-test analysis . 49
6.1 Purpose . 49
6.2 Modal survey test FEM . 49
6.2.1 Purpose . 49
6.2.2 Reduction of the detailed FEM . 50
6.3 Test analysis model (TAM) . 52
6.3.1 Purpose . 52
6.3.2 TAM accuracy . 53
6.3.3 Measurement point plan (MPP) . 53
6.3.4 Test predictions . 54
6.3.5 Test fixture participation . 54
6.4 Documentation . 55
6.4.1 FEM documentation . 55
6.4.2 TAM documentation . 55
Annex A (informative) Excitation signals . 57
A.1 Overview . 57
A.2 Purpose and classification . 57
A.3 Excitation methods . 58
Annex B (informative) Estimation methods for modal parameters . 61
B.1 Overview . 61
B.2 Theoretical background and overview. 61
B.3 Frequency domain methods . 67
B.4 Time domain methods . 71
Annex C (informative) Modal test - mathematical model verification
checklist . 74
Annex D (informative) References . 76
Bibliography . 77
Figures
Figure 5-1: Test planning activities . 32
Figure 5-2: Comparison of mode indicator functions (MIF)
according to Breitbach and Hunt . 43
Figure 6-1: Modal survey pre-test analysis activities . 50
Tables
Table 5-1: Test objectives and associated requirements for the test boundary
conditions . 35
Table 5-2: Most commonly used correlation techniques . 46
Table 5-3: Test-analysis correlation quality criteria . 48
Table 5-4: Reduced mathematical model quality criteria . 48
Table 6-1: Advantages and disadvantages of model reduction techniques . 52
Table B-1 : Overview and classification of commonly used modal parameter estimation
methods . 64
Table B-2 : Advantages and disadvantages of the time and frequency domain methods. 65
Table B-3 : Advantages and disadvantages of single and multiple degree of freedom
methods . 66
Table B-4 : Other aspects of selecting a modal parameter estimation method . 67
Table C-1 : Verification checklist for mathematical models supporting modal survey
tests . 75
Foreword
This document (EN 16603-32-11:2014) has been prepared by Technical
Committee CEN/CLC/TC 5 “Space”, the secretariat of which is held by DIN.
This standard (EN 16603-32-11:2014) originates from ECSS-E-ST-32-11C.
This European Standard shall be given the status of a national standard, either
by publication of an identical text or by endorsement, at the latest by February
2015, and conflicting national standards shall be withdrawn at the latest by
February 2015.
Attention is drawn to the possibility that some of the elements of this document
may be the subject of patent rights. CEN [and/or CENELEC] shall not be held
responsible for identifying any or all such patent rights.
This document has been prepared under a mandate given to CEN by the
European Commission and the European Free Trade Association.
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