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Vibration measurements in wind power turbines,[object Object],Alex Lollio,[object Object],Nov, 2010,[object Object]
Agenda,[object Object],Why vibration measurements?,[object Object],National Instruments solution,[object Object],Hardware,[object Object],Software,[object Object],Positioning vs competition,[object Object],Conclusions,[object Object]
Introduction:damage due to structural vibrations,[object Object],1940: Tacoma bridge disaster,[object Object],[object Object]
 High mechanical stress,[object Object]
 High mechanical stress,[object Object]
High vibration level10 kg,[object Object],Mechanical stress,[object Object],Noise emission,[object Object]
How to monitor the system vibrations?,[object Object],Mounting a 3D accelerometer,[object Object],[object Object]
It needs a PC or PLC to collect dataKey point  :  System integration,[object Object]
Agenda,[object Object],Why vibration measurements,[object Object],National Instruments solution,[object Object],Hardware,[object Object],Software,[object Object],Positioning vs competition,[object Object],Conclusions,[object Object]
NI Hardware Platform,[object Object],Multi-Chassis,[object Object],Application Complexity,[object Object],PXI,[object Object],PXI-Laptop,[object Object],cDAQ,[object Object],USB,[object Object],Channel Count,[object Object]
The simplest NI hardware solutions,[object Object],NI 9234 (4-channels, 24 bit IEPE, 51kS/s),[object Object],Price: 1564 €,[object Object],+,[object Object],Carrier USB 9162,[object Object],Carrier WLS-9163,[object Object],+,[object Object],+,[object Object],Carrier ENET-9163,[object Object],Price: 251 €,[object Object],Price: 443 €,[object Object],Price: 342 €,[object Object]
The best NI hardware solutions,[object Object],NI cRIO-9025,[object Object],Real-Time Controller: 800 MHz, 512 MB DRAM, 4 GB Storage,[object Object],[object Object]
 800 MHz processor, 4 GB nonvolatile storage, 512 MB DDR2 memory
 Dual Ethernet ports with embedded Web and file servers for remote user interfacing
 Hi-Speed USB host port for connection to USB flash and memory devices
 RS232 serial port for connection to peripherals; dual 9 to 35 VDC supply inputPrice: 4190 €,[object Object]
Software: LabVIEWSound and Vibration Meas. Suite,[object Object],Vibration Level,[object Object],Spectrum Analysis (baseband, zoom, subset FFTs),[object Object],Frequency Response (broadband, swept-sine, impact, shock-response),[object Object],Short-time Frequency Analysis (STFT),[object Object],Over 60 examples using both hardware and simulated data,[object Object],Hardware independent (but has example support for all DAQmx devices),[object Object],UNI/EN standard,[object Object],Price: 3887 €,[object Object]
Labview Order Analysis Toolkit:What is Order Analysis?,[object Object],[object Object],Many noise and vibration signal components are directly related to running (rotating) speed,[object Object],Order analysis normalizes the measurements to the rotating speed to better dissect these signal components,[object Object]
Example: Power Spectrum,[object Object],Rotating Speed:,[object Object],60 Hz,[object Object],(3600 RPM),[object Object],Frequency components shift with speed change,[object Object],Rotating Speed:,[object Object],50 Hz,[object Object],(3000 RPM),[object Object]
Order Power Spectrum,[object Object],Rotating Speed:,[object Object],60 Hz,[object Object],(3600 RPM),[object Object],Order components remain fixed with speed change,[object Object],Rotating Speed:,[object Object],50 Hz,[object Object],(3000 RPM),[object Object]
Relationship of Orders and Faults,[object Object],We can diagnose machine faults by knowing the order:,[object Object],Imbalance,[object Object],Misalignment,[object Object],Loose Coupling,[object Object],Valve Noise,[object Object],Bearing Defects / Wear,[object Object],Blade Pass Frequency,[object Object],Gear Mesh,[object Object],Low Order,[object Object],High Order,[object Object]

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Vibration Measurements In Wind Power Turbines

Editor's Notes

  1. Resampling and Comparison Setup—Contains the following options:Interpolation type—Contains the following options:Coerce—Sets each output sample value to equal the input sample value that is closest to it in time.Linear—(Default) Sets each output sample value to be a linear interpolation between the two input samples that are closest to it in time.Spline—Uses the spline interpolation algorithm to compute the resampled values.Filter based—Uses an interpolation method based on the convolution of the signal with a finite impulse response (FIR) filter.Operation—Specifies the arithmetic operation to perform. You can select from the following options:Add—(Default) Adds the input signals.Subtract—Subtracts the second input from the first.Multiply—Multiplies the first input by the second input.Divide—Divides the first input by the second input.FIR Filter Specifications—Contains the following options:Normalized bandwidth—[Interpolation type: Filter based] The normalized cut-off frequency of the FIR filter to use. The default is 0.4000.Alias rejection (dB)—[Interpolation type: Filter based] The minimum stopband attenuation of the FIR filter to use. The default is 80 dB.