Page 3 - Important Information; Warranty; Patents; WARNING REGARDING USE OF NATIONAL INSTRUMENTS PRODUCTS
Important Information Warranty The media on which you receive National Instruments software are warranted not to fail to execute programming instructions, due to defects in materials and workmanship, for a period of 90 days from date of shipment, as evidenced by receipts or other documentation. Nati...
Page 4 - Contents; About This Manual
© National Instruments Corporation v LabVIEW Order Analysis Toolset User Manual Contents About This Manual How to Use This Manual ............................................................................................... viiConventions ..............................................................
Page 5 - Glossary
Contents LabVIEW Order Analysis Toolset User Manual vi ni.com Chapter 3Gabor Transform-Based Order Tracking Overview of Gabor Order Analysis............................................................................... 3-1Extracting the Order Components ................................................
Page 6 - How to Use This Manual; Order Analysis Toolset; Help»Order Analysis; Order Analysis Toolset Help; Conventions; File»Page Setup»Options
© National Instruments Corporation vii LabVIEW Order Analysis Toolset User Manual About This Manual This manual provides information about the LabVIEW Order Analysis Toolset, including system requirements, installation, and suggestions for getting started with order analysis and the toolset. The man...
Page 7 - bold; italic; Related Documentation; LabVIEW Order Analysis Toolset Help
About This Manual LabVIEW Order Analysis Toolset User Manual viii ni.com bold Bold text denotes items that you must select or click in the software, such as menu items and dialog box options. Bold text also denotes the names of parameters, dialog boxes, sections of dialog boxes, windows, menus, pale...
Page 8 - Overview of the LabVIEW Order Analysis Toolset; Calculation and examination of rotational speed; Overview of the LabVIEW Order Analysis Start-Up Kit; Start»Programs»National Instruments»Order
© National Instruments Corporation 1-1 LabVIEW Order Analysis Toolset User Manual 1 Introduction to the LabVIEW Order Analysis Toolset This chapter introduces the LabVIEW Order Analysis Toolset and the Order Analysis Start-Up Kit, outlines system requirements, and gives installation instructions. Ov...
Page 10 - System Requirements; LabVIEW Release Notes; Installation; Start»Run; Start»Run
Chapter 1 Introduction to the LabVIEW Order Analysis Toolset © National Instruments Corporation 1-3 LabVIEW Order Analysis Toolset User Manual System Requirements You must have LabVIEW 6.1 or later Full Development System or Professional Development System installed to run the LabVIEW Order Analysis...
Page 11 - Example VIs; Acquiring Data for Example VIs
Chapter 1 Introduction to the LabVIEW Order Analysis Toolset LabVIEW Order Analysis Toolset User Manual 1-4 ni.com Example VIs If you have experience with order analysis, the example VIs, located in the examples\Order Analysis directory, can help you learn how to use the LabVIEW Order Analysis Tools...
Page 12 - Acquire Data with PXI 4472
Chapter 1 Introduction to the LabVIEW Order Analysis Toolset © National Instruments Corporation 1-5 LabVIEW Order Analysis Toolset User Manual set to DAQ and you click the Run button on the front panel of the example VI, one of the following VIs opens: • Acquire Data (Analog Tach) VI • Acquire Data ...
Page 13 - Acquire Data with PXI 4472 and TIO VI
Chapter 1 Introduction to the LabVIEW Order Analysis Toolset LabVIEW Order Analysis Toolset User Manual 1-6 ni.com tachometer signal and S&V for the sound or vibration sensor. After choosing data acquisition settings, enter the number of pulses you want the tachometer to generate per revolution ...
Page 14 - Configuration
Chapter 1 Introduction to the LabVIEW Order Analysis Toolset © National Instruments Corporation 1-7 LabVIEW Order Analysis Toolset User Manual Figure 1-3. Acquire Data with PXI 4472 and TIO VI Configuration Tab Use the Configuration tab of the Acquire Data with PXI 4472 and TIO VI, shown in Figure 1...
Page 15 - The; Acquisition; observe data. Click the; Acquire; button to acquire data. Continue to; OK; button to return to the front panel of the
Chapter 1 Introduction to the LabVIEW Order Analysis Toolset LabVIEW Order Analysis Toolset User Manual 1-8 ni.com Figure 1-4. Acquire Data with PXI 4472 and TIO VI Acquisition Tab The Acquisition tab, shown in Figure 1-4, allows you to acquire and observe data. Click the Acquire button to acquire d...
Page 16 - Order Analysis; Order Analysis Definition and Application
© National Instruments Corporation 2-1 LabVIEW Order Analysis Toolset User Manual 2 Order Analysis This chapter gives brief descriptions of the need for order analysis, the basic concepts of order analysis, the effect of rotational speed on order identification, and the different order analysis meth...
Page 17 - order the harmonic at twice the frequency of the rotational speed
Chapter 2 Order Analysis LabVIEW Order Analysis Toolset User Manual 2-2 ni.com vibration signals. The frequency-domain representations of noise and vibration behave as harmonics of the machine rotational speed. In many industries, the harmonics related to the rotational speed are referred to as orde...
Page 18 - Imbalance results in a spectral peak at the first order.
Chapter 2 Order Analysis © National Instruments Corporation 2-3 LabVIEW Order Analysis Toolset User Manual Assuming that speed remains constant during data acquisition, you can use the following equations to switch between the frequency domain and the order domain. Orders often reflect the physical ...
Page 19 - Effect of Rotational Speed on Order; Effect of Rotational Speed on Order Identification; Constant Rotational Speed
Chapter 2 Order Analysis LabVIEW Order Analysis Toolset User Manual 2-4 ni.com Like classical harmonic analysis, order analysis is a powerful tool for gaining a better understanding of the condition of rotating machinery. However, compared to harmonic analysis, order analysis is more effective for t...
Page 21 - Variable Rotational Speed; According to Fourier analysis theory, the frequency
Chapter 2 Order Analysis LabVIEW Order Analysis Toolset User Manual 2-6 ni.com Variable Rotational Speed In addition to testing rotating machinery running at a constant speed, researchers often perform tests involving run-up and run-down. Like a swept-sine stimulus, testing run-up and run-down provi...
Page 24 - Harmonic Analysis; Order Analysis Methods
Chapter 2 Order Analysis © National Instruments Corporation 2-9 LabVIEW Order Analysis Toolset User Manual orders overlap, you are unable to derive meaningful information about the individual orders. Harmonic Analysis Harmonic analysis is suitable for the analysis of rotating machinery only when the...
Page 25 - Gabor transform; Gabor Transform
Chapter 2 Order Analysis LabVIEW Order Analysis Toolset User Manual 2-10 ni.com Currently, the following methods generally are used to perform order analysis: • Gabor transform • Resampling • Adaptive filter The LabVIEW Order Analysis Toolset provides the Gabor-transform-based method and the resampl...
Page 27 - Figure 2-8 shows two examples of padding.; Gabor Expansion and Gabor Transform
Chapter 2 Order Analysis LabVIEW Order Analysis Toolset User Manual 2-12 ni.com Figure 2-8 shows two examples of padding. Figure 2-8. Padding Examples Refer to Appendix A, Gabor Expansion and Gabor Transform , for more information about the Gabor transform and the Gabor expansion. Refer to Chapter 3...
Page 28 - Uses interpolation to obtain new samples at the desired time.
Chapter 2 Order Analysis © National Instruments Corporation 2-13 LabVIEW Order Analysis Toolset User Manual Resampling Resampling is a widely used method of order analysis. Figure 2-9 illustrates the resampling method. Figure 2-9. Resampling In the resampling method, time-samples are converted to an...
Page 29 - Figure 2-10 shows the spectrum of angle samples.
Chapter 2 Order Analysis LabVIEW Order Analysis Toolset User Manual 2-14 ni.com After acquiring angle samples with either hardware or software, you can perform a Fourier transform on the angle samples to analyze them. Because the time domain has changed into the angle domain, the frequency domain no...
Page 30 - Resampling-Based Order Analysis; Adaptive Filter
Chapter 2 Order Analysis © National Instruments Corporation 2-15 LabVIEW Order Analysis Toolset User Manual After the resampling process takes place, recovering a time waveform at a specific order might be difficult. Refer to Chapter 4, Resampling-Based Order Analysis , for information about how the...
Page 31 - Analyze the order components of a noise or vibration signal; Overview of Gabor Order Analysis
© National Instruments Corporation 3-1 LabVIEW Order Analysis Toolset User Manual 3 Gabor Transform-Based Order Tracking This chapter discusses a new order analysis method based on the Gabor transform and provided by the LabVIEW Order Analysis Toolset that enables you to complete the following tasks...
Page 33 - Calculating Rotational Speed; Extracting the Order Components
Chapter 3 Gabor Transform-Based Order Tracking © National Instruments Corporation 3-3 LabVIEW Order Analysis Toolset User Manual Complete the following steps to perform Gabor order analysis. 1. Acquire data samples from the tachometer and noise or vibration sensors synchronously at some constant sam...
Page 34 - RPM; i n d e x
Chapter 3 Gabor Transform-Based Order Tracking LabVIEW Order Analysis Toolset User Manual 3-4 ni.com processed by a Gabor transform, the index of the n th order is given by the following equation. , where RPM is the averaged instantaneous rotational speed in the time interval, N is the number of fre...
Page 35 - Masking; mask; TRUE; FALSE
Chapter 3 Gabor Transform-Based Order Tracking © National Instruments Corporation 3-5 LabVIEW Order Analysis Toolset User Manual Figure 3-3(b) illustrates constant order bandwidth. The neighborhood is considered as the region between and . While the frequency bandwidth varies in time, the order band...
Page 36 - VI to perform the mask operation. Refer to the; Extracting Orders
Chapter 3 Gabor Transform-Based Order Tracking LabVIEW Order Analysis Toolset User Manual 3-6 ni.com VI to perform the mask operation. Refer to the LabVIEW Order Analysis Toolset Help for information about the Template to Mask VI. You can consider the mask operation a time-variant bandpass filter in...
Page 37 - Reconstructing the Signal
Chapter 3 Gabor Transform-Based Order Tracking © National Instruments Corporation 3-7 LabVIEW Order Analysis Toolset User Manual Figure 3-4(b) shows a mask array around the fourth order with a constant frequency bandwidth. The TRUE values comprise the white area, while the FALSE values comprise the ...
Page 38 - Displaying Spectral Maps
Chapter 3 Gabor Transform-Based Order Tracking LabVIEW Order Analysis Toolset User Manual 3-8 ni.com time-variant filters. Figure 3-6 shows an original signal and the spectrum of the reconstructed signal. Figure 3-6. Spectrum of Reconstructed Signal In Figure 3-6, one row is selected from the joint ...
Page 40 - order components appear as lines with a slope of; Calculating Waveform Magnitude; F r e q u e n c y
Chapter 3 Gabor Transform-Based Order Tracking LabVIEW Order Analysis Toolset User Manual 3-10 ni.com Figure 3-7(c) shows the frequency-rpm spectral map. The horizontal axis represents rpm, or rotational speed. You can map the rpm axis from the time axis in the frequency-time spectral map by the rpm...
Page 41 - LabVIEW Order Analysis Toolset Resampling Method; Resample even time-space samples to even angle-spaced samples
© National Instruments Corporation 4-1 LabVIEW Order Analysis Toolset User Manual 4 Resampling-Based Order Analysis This chapter describes the resampling method provided by the LabVIEW Order Analysis Toolset, determining the time instance for resampling, resampling vibration data, and slow roll comp...
Page 42 - Important Considerations for the Analysis of Rotating; Determining the Time Instance for Resampling
Chapter 4 Resampling-Based Order Analysis LabVIEW Order Analysis Toolset User Manual 4-2 ni.com Complete the following steps to perform resampling-based order analysis. 1. Acquire data samples from tachometer and noise or vibration sensors synchronously at some constant sample rate. 2. Use the LabVI...
Page 43 - a larger margin of samples for analysis and need to resample 2.5
Chapter 4 Resampling-Based Order Analysis © National Instruments Corporation 4-3 LabVIEW Order Analysis Toolset User Manual a larger margin of samples for analysis and need to resample 2.5 K samples in one revolution. Most of the time, a tachometer does not produce enough pulses in one revolution. T...
Page 44 - Resampling Vibration Data; nT
Chapter 4 Resampling-Based Order Analysis LabVIEW Order Analysis Toolset User Manual 4-4 ni.com Figure 4-2. Original Time Sequence and CIC Interpolation Filter with an Interpolation Factor of Eight Resampling Vibration Data The resampling operation converts a vibration signal from the time domain in...
Page 45 - Slow Roll Compensation; x n T
Chapter 4 Resampling-Based Order Analysis © National Instruments Corporation 4-5 LabVIEW Order Analysis Toolset User Manual According to the Nyquist sampling theorem, you can exactly reconstruct the time signal x ( t ) from samples x ( nT s ) with the following equation. (4-1) where h s is a sinc fu...
Page 47 - Digital Differentiator Method; of the shaft as a function of time
© National Instruments Corporation 5-1 LabVIEW Order Analysis Toolset User Manual 5 Calculating Rotational Speed This chapter describes the digital differentiator method used by the LabVIEW Order Analysis Toolset to calculate rotational speed and describes averaging pulses to smooth noisy calculated...
Page 48 - d t
Chapter 5 Calculating Rotational Speed LabVIEW Order Analysis Toolset User Manual 5-2 ni.com Figure 5-1. Tachometer Signal and Rotation Angle The arrival time t k of the pulses P ( k ) in the tachometer signal correspond to the cumulative rotation angle θ ( t k ). The cumulative rotation angle funct...
Page 49 - For the evenly separated function series; Averaging Pulses
Chapter 5 Calculating Rotational Speed © National Instruments Corporation 5-3 LabVIEW Order Analysis Toolset User Manual of an equally spaced sequence requires fewer computations than calculating the first derivative of an unequally spaced sequence. For the evenly separated function series t k , you...
Page 51 - Gabor Expansion and Gabor Transform Basics; For a discrete sample; h k m
© National Instruments Corporation A-1 LabVIEW Order Analysis Toolset User Manual A Gabor Expansion and Gabor Transform This appendix presents an overview of the Gabor expansion and the Gabor transform methods used in the LabVIEW Order Analysis Toolset. This appendix also describes application issue...
Page 52 - k m; k i L
Appendix A Gabor Expansion and Gabor Transform LabVIEW Order Analysis Toolset User Manual A-2 ni.com The sampled STFT is also known as the Gabor transform and is represented by the following equation. (A-2) where ∆ M represents the time sampling interval and N represents the total number of frequenc...
Page 53 - m i n
Appendix A Gabor Expansion and Gabor Transform © National Instruments Corporation A-3 LabVIEW Order Analysis Toolset User Manual corresponding dual window function from ∆ M independent linear systems with the following equation. (A-4) where L denotes the window length. denotes a periodic auxiliary f...
Page 54 - h k m T
Appendix A Gabor Expansion and Gabor Transform LabVIEW Order Analysis Toolset User Manual A-4 ni.com Discrete Gabor-Expansion-Based Time-Varying Filter Initially, discrete Gabor expansion seems to provide a feasible method for converting an arbitrary signal from the time domain into the joint time-f...
Page 55 - Repeat steps 1 through 4 until the time waveforms converge.
Appendix A Gabor Expansion and Gabor Transform © National Instruments Corporation A-5 LabVIEW Order Analysis Toolset User Manual 4. Compute the new Gabor coefficients after you obtain the time waveform. 5. Repeat steps 1 through 4 until the time waveforms converge. Without a loss of generality, rewr...
Page 56 - Gabor Expansion and Gabor
Appendix A Gabor Expansion and Gabor Transform LabVIEW Order Analysis Toolset User Manual A-6 ni.com C k and converge. with . For with , the support of C k in the time-frequency domain is inside the masked area if and only if the following equation is true. (A-6) for 0 ≤ k < N and 0 ≤ m < . Tw...
Page 57 - References
© National Instruments Corporation B-1 LabVIEW Order Analysis Toolset User Manual B References This appendix lists the reference material used for the LabVIEW Order Analysis Toolset. • Albright, Michael, and Shie Qian. Comparison of the New Proposed Gabor Order Tracking Technique vs. Other Order Tra...
Page 59 - See also
© National Instruments Corporation G-1 LabVIEW Order Analysis Toolset User Manual Glossary Numbers/Symbols Infinity. 2D Two-dimensional. A adaptive filter A type of filter that operates on a recursive algorithm to achieve the goal of optimum. It is self-designing and suitable for tracking time varia...
Page 62 - Index
© National Instruments Corporation I-1 LabVIEW Order Analysis Toolset User Manual Index A adaptive filter, 2-15analysis of rotating machinery, using the toolset, 1-2 applying an iteration to reconstruct a time waveform, A-4 C calculating rotational speed, 5-1 averaging pulses, 5-3digital differentia...
Page 63 - National Instruments
Index LabVIEW Order Analysis Toolset User Manual I-2 ni.com K KnowledgeBase, C-1 M masking, 3-5 extracting orders, 3-6reconstructing a signal, 3-7 N National Instruments customer education, C-1professional services, C-1system integration services, C-1technical support, C-1worldwide offices, C-1 O on...
