National-instruments Order Analysis Toolset Manual do Utilizador

LabVIEWTMOrder Analysis ToolsetUser ManualLabVIEW Order Analysis Toolset User ManualAugust 2003 EditionPart Number 322879B-01

Chapter 1 Introduction to the LabVIEW Order Analysis Toolset© National Instruments Corporation 1-3 LabVIEW Order Analysis Toolset User ManualSystem Re

Chapter 1 Introduction to the LabVIEW Order Analysis ToolsetLabVIEW Order Analysis Toolset User Manual 1-4 ni.comExample VIsIf you have experience wit

Chapter 1 Introduction to the LabVIEW Order Analysis Toolset© National Instruments Corporation 1-5 LabVIEW Order Analysis Toolset User Manualset to DA

Chapter 1 Introduction to the LabVIEW Order Analysis ToolsetLabVIEW Order Analysis Toolset User Manual 1-6 ni.comtachometer signal and S&V for the

Chapter 1 Introduction to the LabVIEW Order Analysis Toolset© National Instruments Corporation 1-7 LabVIEW Order Analysis Toolset User Manual Figure 1

Chapter 1 Introduction to the LabVIEW Order Analysis ToolsetLabVIEW Order Analysis Toolset User Manual 1-8 ni.comFigure 1-4. Acquire Data with PXI 44

© National Instruments Corporation 2-1 LabVIEW Order Analysis Toolset User Manual2Order AnalysisThis chapter gives brief descriptions of the need for

Chapter 2 Order AnalysisLabVIEW Order Analysis Toolset User Manual 2-2 ni.comvibration signals. The frequency-domain representations of noise and vibr

Chapter 2 Order Analysis© National Instruments Corporation 2-3 LabVIEW Order Analysis Toolset User ManualAssuming that speed remains constant during d

Chapter 2 Order AnalysisLabVIEW Order Analysis Toolset User Manual 2-4 ni.comLike classical harmonic analysis, order analysis is a powerful tool for g

SupportWorldwide Technical Support and Product Informationni.comNational Instruments Corporate Headquarters11500 North Mopac Expressway Austin, Texas

Chapter 2 Order Analysis© National Instruments Corporation 2-5 LabVIEW Order Analysis Toolset User ManualFigure 2-3. PC Fan Running at Constant Speed

Chapter 2 Order AnalysisLabVIEW Order Analysis Toolset User Manual 2-6 ni.comVariable Rotational SpeedIn addition to testing rotating machinery runnin

Chapter 2 Order Analysis© National Instruments Corporation 2-7 LabVIEW Order Analysis Toolset User Manualtime, the overall frequency bandwidth, as mea

Chapter 2 Order AnalysisLabVIEW Order Analysis Toolset User Manual 2-8 ni.comharmonics overlap in the conventional power spectrum, you are unable to i

Chapter 2 Order Analysis© National Instruments Corporation 2-9 LabVIEW Order Analysis Toolset User Manualorders overlap, you are unable to derive mean

Chapter 2 Order AnalysisLabVIEW Order Analysis Toolset User Manual 2-10 ni.comCurrently, the following methods generally are used to perform order ana

Chapter 2 Order Analysis© National Instruments Corporation 2-11 LabVIEW Order Analysis Toolset User ManualFigure 2-7. Padding SchemesIn zero padding,

Chapter 2 Order AnalysisLabVIEW Order Analysis Toolset User Manual 2-12 ni.comFigure 2-8 shows two examples of padding.Figure 2-8. Padding ExamplesRe

Chapter 2 Order Analysis© National Instruments Corporation 2-13 LabVIEW Order Analysis Toolset User ManualResamplingResampling is a widely used method

Chapter 2 Order AnalysisLabVIEW Order Analysis Toolset User Manual 2-14 ni.comAfter acquiring angle samples with either hardware or software, you can

Important InformationWarrantyThe media on which you receive National Instruments software are warranted not to fail to execute programming instructio

Chapter 2 Order Analysis© National Instruments Corporation 2-15 LabVIEW Order Analysis Toolset User ManualAfter the resampling process takes place, re

© National Instruments Corporation 3-1 LabVIEW Order Analysis Toolset User Manual3Gabor Transform-Based Order TrackingThis chapter discusses a new ord

Chapter 3 Gabor Transform-Based Order TrackingLabVIEW Order Analysis Toolset User Manual 3-2 ni.comIn Figure 3-1, the magnitudes of coefficients are s

Chapter 3 Gabor Transform-Based Order Tracking© National Instruments Corporation 3-3 LabVIEW Order Analysis Toolset User ManualComplete the following

Chapter 3 Gabor Transform-Based Order TrackingLabVIEW Order Analysis Toolset User Manual 3-4 ni.comprocessed by a Gabor transform, the index of the nt

Chapter 3 Gabor Transform-Based Order Tracking© National Instruments Corporation 3-5 LabVIEW Order Analysis Toolset User ManualFigure 3-3(b) illustrat

Chapter 3 Gabor Transform-Based Order TrackingLabVIEW Order Analysis Toolset User Manual 3-6 ni.comVI to perform the mask operation. Refer to the LabV

Chapter 3 Gabor Transform-Based Order Tracking© National Instruments Corporation 3-7 LabVIEW Order Analysis Toolset User ManualFigure 3-4(b) shows a m

Chapter 3 Gabor Transform-Based Order TrackingLabVIEW Order Analysis Toolset User Manual 3-8 ni.comtime-variant filters. Figure 3-6 shows an original

Chapter 3 Gabor Transform-Based Order Tracking© National Instruments Corporation 3-9 LabVIEW Order Analysis Toolset User ManualFigure 3-7. 2D Spectra

© National Instruments Corporation v LabVIEW Order Analysis Toolset User ManualContentsAbout This ManualHow to Use This Manual ...

Chapter 3 Gabor Transform-Based Order TrackingLabVIEW Order Analysis Toolset User Manual 3-10 ni.comFigure 3-7(c) shows the frequency-rpm spectral map

© National Instruments Corporation 4-1 LabVIEW Order Analysis Toolset User Manual4Resampling-Based Order AnalysisThis chapter describes the resampling

Chapter 4 Resampling-Based Order AnalysisLabVIEW Order Analysis Toolset User Manual 4-2 ni.comComplete the following steps to perform resampling-based

Chapter 4 Resampling-Based Order Analysis© National Instruments Corporation 4-3 LabVIEW Order Analysis Toolset User Manuala larger margin of samples f

Chapter 4 Resampling-Based Order AnalysisLabVIEW Order Analysis Toolset User Manual 4-4 ni.comFigure 4-2. Original Time Sequence and CIC Interpolatio

Chapter 4 Resampling-Based Order Analysis© National Instruments Corporation 4-5 LabVIEW Order Analysis Toolset User ManualAccording to the Nyquist sam

Chapter 4 Resampling-Based Order AnalysisLabVIEW Order Analysis Toolset User Manual 4-6 ni.comWhen monitoring shaft vibration with a proximity probe,

© National Instruments Corporation 5-1 LabVIEW Order Analysis Toolset User Manual5Calculating Rotational SpeedThis chapter describes the digital diffe

Chapter 5 Calculating Rotational SpeedLabVIEW Order Analysis Toolset User Manual 5-2 ni.comFigure 5-1. Tachometer Signal and Rotation AngleThe arriva

Chapter 5 Calculating Rotational Speed© National Instruments Corporation 5-3 LabVIEW Order Analysis Toolset User Manualof an equally spaced sequence r

ContentsLabVIEW Order Analysis Toolset User Manual vi ni.comChapter 3Gabor Transform-Based Order TrackingOverview of Gabor Order Analysis...

Chapter 5 Calculating Rotational SpeedLabVIEW Order Analysis Toolset User Manual 5-4 ni.comFigure 5-2 shows an example of the rotational speed calcula

© National Instruments Corporation A-1 LabVIEW Order Analysis Toolset User ManualAGabor Expansion and Gabor TransformThis appendix presents an overvie

Appendix A Gabor Expansion and Gabor TransformLabVIEW Order Analysis Toolset User Manual A-2 ni.comThe sampled STFT is also known as the Gabor transfo

Appendix A Gabor Expansion and Gabor Transform© National Instruments Corporation A-3 LabVIEW Order Analysis Toolset User Manualcorresponding dual wind

Appendix A Gabor Expansion and Gabor TransformLabVIEW Order Analysis Toolset User Manual A-4 ni.comDiscrete Gabor-Expansion-Based Time-Varying FilterI

Appendix A Gabor Expansion and Gabor Transform© National Instruments Corporation A-5 LabVIEW Order Analysis Toolset User Manual4. Compute the new Gabo

Appendix A Gabor Expansion and Gabor TransformLabVIEW Order Analysis Toolset User Manual A-6 ni.comCk and converge. with . For with , the suppor

© National Instruments Corporation B-1 LabVIEW Order Analysis Toolset User ManualBReferencesThis appendix lists the reference material used for the La

© National Instruments Corporation C-1 LabVIEW Order Analysis Toolset User ManualCTechnical Support and Professional ServicesVisit the following secti

© National Instruments Corporation G-1 LabVIEW Order Analysis Toolset User ManualGlossaryNumbers/SymbolsInfinity.2D Two-dimensional.Aadaptive filter A

© National Instruments Corporation vii LabVIEW Order Analysis Toolset User ManualAbout This ManualThis manual provides information about the LabVIEW O

GlossaryLabVIEW Order Analysis Toolset User Manual G-2 ni.comFFFT Fast Fourier transform.fundamental component Portion of a signal whose frequency is

Glossary© National Instruments Corporation G-3 LabVIEW Order Analysis Toolset User Manualorder curves The high power density curves in a spectral map

© National Instruments Corporation I-1 LabVIEW Order Analysis Toolset User ManualIndexAadaptive filter, 2-15analysis of rotating machinery, using the

IndexLabVIEW Order Analysis Toolset User Manual I-2 ni.comKKnowledgeBase, C-1Mmasking, 3-5extracting orders, 3-6reconstructing a signal, 3-7NNational

About This ManualLabVIEW Order Analysis Toolset User Manual viii ni.combold Bold text denotes items that you must select or click in the software, suc

© National Instruments Corporation 1-1 LabVIEW Order Analysis Toolset User Manual1Introduction to the LabVIEW Order Analysis ToolsetThis chapter intro

Chapter 1 Introduction to the LabVIEW Order Analysis ToolsetLabVIEW Order Analysis Toolset User Manual 1-2 ni.comapplication is built with components