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><channel><title>Prosig Noise &#38; Vibration Blog &#187; rotating machinery : Noise &amp; Vibration Blog : What You Need To Know About Noise &amp; Vibration Measurement</title> <atom:link href="http://blog.prosig.com/tag/rotating-machinery/feed/" rel="self" type="application/rss+xml" /><link>http://blog.prosig.com</link> <description>Telling you what you need to know about noise &#38; vibration</description> <lastBuildDate>Tue, 07 Feb 2012 10:49:33 +0000</lastBuildDate> <language>en</language> <sy:updatePeriod>hourly</sy:updatePeriod> <sy:updateFrequency>1</sy:updateFrequency> <generator>http://wordpress.org/?v=3.3.1</generator> <item><title>Video: Noise &amp; Vibration From Rotating Machines</title><link>http://blog.prosig.com/2011/10/04/video-how-to-analyze-noise-vibration-from-rotating-machinery/</link> <comments>http://blog.prosig.com/2011/10/04/video-how-to-analyze-noise-vibration-from-rotating-machinery/#comments</comments> <pubDate>Tue, 04 Oct 2011 08:25:33 +0000</pubDate> <dc:creator>Chris Mason</dc:creator> <category><![CDATA[signal processing]]></category> <category><![CDATA[videos]]></category> <category><![CDATA[FFT]]></category> <category><![CDATA[harmonics]]></category> <category><![CDATA[noise]]></category> <category><![CDATA[noise vibration]]></category> <category><![CDATA[orders]]></category> <category><![CDATA[rotating machinery]]></category> <category><![CDATA[speed]]></category> <category><![CDATA[tacho]]></category> <category><![CDATA[vibration]]></category> <category><![CDATA[waterfall]]></category><guid
isPermaLink="false">http://blog.prosig.com/?p=2514</guid> <description><![CDATA[This is complete version of the video illustrating my recent article How To Measure Noise &#38; Vibration In Rotating Machines. This video was previously published on the blog in 3 parts....]]></description> <wfw:commentRss>http://blog.prosig.com/2011/10/04/video-how-to-analyze-noise-vibration-from-rotating-machinery/feed/</wfw:commentRss> <slash:comments>0</slash:comments> </item> <item><title>How To Analyze Noise &amp; Vibration In Rotating Machines</title><link>http://blog.prosig.com/2011/08/09/how-to-measure-noise-vibration-in-rotating-machines/</link> <comments>http://blog.prosig.com/2011/08/09/how-to-measure-noise-vibration-in-rotating-machines/#comments</comments> <pubDate>Tue, 09 Aug 2011 09:07:54 +0000</pubDate> <dc:creator>Chris Mason</dc:creator> <category><![CDATA[popular]]></category> <category><![CDATA[signal processing]]></category> <category><![CDATA[acceleration]]></category> <category><![CDATA[bearings]]></category> <category><![CDATA[DATS]]></category> <category><![CDATA[excitation]]></category> <category><![CDATA[fatigue]]></category> <category><![CDATA[natural frequencies]]></category> <category><![CDATA[noise]]></category> <category><![CDATA[orders]]></category> <category><![CDATA[P8000]]></category> <category><![CDATA[refinement]]></category> <category><![CDATA[rotating machinery]]></category> <category><![CDATA[tacho]]></category> <category><![CDATA[tachometer]]></category> <category><![CDATA[torsional vibration]]></category> <category><![CDATA[transmission systems]]></category> <category><![CDATA[variable speed]]></category> <category><![CDATA[vibration]]></category> <category><![CDATA[vibration analysis]]></category> <category><![CDATA[waterfall]]></category><guid
isPermaLink="false">http://blog.prosig.com/?p=2170</guid> <description><![CDATA[In this article we will look at the basic steps behind a simple rotating machinery study. We won&#8217;t look in great detail at some of the techniques involved &#8211; we deal with...]]></description> <wfw:commentRss>http://blog.prosig.com/2011/08/09/how-to-measure-noise-vibration-in-rotating-machines/feed/</wfw:commentRss> <slash:comments>3</slash:comments> <enclosure
url="http://blog.prosig.com/wp-content/uploads/2011/07/noiseSignal.mp3" length="91844" type="audio/mpeg" /> </item> <item><title>Do Missing Tacho Pulses Mean The End Of The Road For Your Test?</title><link>http://blog.prosig.com/2010/09/20/do-missing-tacho-pulses-mean-the-end-of-the-road-for-your-test/</link> <comments>http://blog.prosig.com/2010/09/20/do-missing-tacho-pulses-mean-the-end-of-the-road-for-your-test/#comments</comments> <pubDate>Mon, 20 Sep 2010 07:46:31 +0000</pubDate> <dc:creator>Dr Colin Mercer</dc:creator> <category><![CDATA[signal processing]]></category> <category><![CDATA[tutorials]]></category> <category><![CDATA[DATS]]></category> <category><![CDATA[instantaneous speed]]></category> <category><![CDATA[prosig]]></category> <category><![CDATA[pulse edge]]></category> <category><![CDATA[pulses]]></category> <category><![CDATA[resample]]></category> <category><![CDATA[rotating machinery]]></category> <category><![CDATA[tacho]]></category> <category><![CDATA[tachometer]]></category> <category><![CDATA[torsional vibration]]></category> <category><![CDATA[vibration analysis]]></category><guid
isPermaLink="false">http://blog.prosig.com/?p=1300</guid> <description><![CDATA[Creating a stable, good quality tacho signal can be one of the hardest parts of analyzing rotating machinery. So what happens if our carefully designed and implemented tacho misses a...]]></description> <wfw:commentRss>http://blog.prosig.com/2010/09/20/do-missing-tacho-pulses-mean-the-end-of-the-road-for-your-test/feed/</wfw:commentRss> <slash:comments>0</slash:comments> </item> <item><title>PROTOR Vibration Condition Monitoring System Installed in Three Thermal Power Plants in Spain for Iberdrola</title><link>http://blog.prosig.com/2010/08/31/protor-vibration-condition-monitoring-system-installed-in-three-thermal-power-plants-in-spain-for-iberdrola/</link> <comments>http://blog.prosig.com/2010/08/31/protor-vibration-condition-monitoring-system-installed-in-three-thermal-power-plants-in-spain-for-iberdrola/#comments</comments> <pubDate>Tue, 31 Aug 2010 11:49:34 +0000</pubDate> <dc:creator>Don Davies</dc:creator> <category><![CDATA[news]]></category> <category><![CDATA[condition monitoring]]></category> <category><![CDATA[Español]]></category> <category><![CDATA[Iberdrola]]></category> <category><![CDATA[PROTOR]]></category> <category><![CDATA[rotating machinery]]></category> <category><![CDATA[Spain]]></category> <category><![CDATA[thermal]]></category><guid
isPermaLink="false">http://blog.prosig.com/?p=1286</guid> <description><![CDATA[IBERDROLA has launched a renewal plan for the existing condition monitoring systems in their plants in Spain. This plan will be implemented gradually and PROSIG was selected to install their...]]></description> <wfw:commentRss>http://blog.prosig.com/2010/08/31/protor-vibration-condition-monitoring-system-installed-in-three-thermal-power-plants-in-spain-for-iberdrola/feed/</wfw:commentRss> <slash:comments>0</slash:comments> </item> <item><title>Aliasing, Orders and Wagon Wheels</title><link>http://blog.prosig.com/2010/06/29/aliasing-orders-and-wagon-wheels/</link> <comments>http://blog.prosig.com/2010/06/29/aliasing-orders-and-wagon-wheels/#comments</comments> <pubDate>Tue, 29 Jun 2010 09:51:21 +0000</pubDate> <dc:creator>Dr Colin Mercer</dc:creator> <category><![CDATA[signal processing]]></category> <category><![CDATA[aliasing]]></category> <category><![CDATA[aliasing theorem]]></category> <category><![CDATA[equal angles]]></category> <category><![CDATA[fourier analysis]]></category> <category><![CDATA[frequency spectrum]]></category> <category><![CDATA[nvh]]></category> <category><![CDATA[rotating machinery]]></category> <category><![CDATA[rotating shaft]]></category> <category><![CDATA[rotational speed]]></category> <category><![CDATA[synchronous sampling]]></category> <category><![CDATA[time domain]]></category><guid
isPermaLink="false">http://blog.prosig.com/?p=1080</guid> <description><![CDATA[These days most people collecting engineering and scientific data digitally have heard of and know of the implications of the sample rate and the highest observable frequency in order to...]]></description> <wfw:commentRss>http://blog.prosig.com/2010/06/29/aliasing-orders-and-wagon-wheels/feed/</wfw:commentRss> <slash:comments>0</slash:comments> </item> <item><title>Vibration Condition Monitoring Using Your Android Smartphone</title><link>http://blog.prosig.com/2010/05/14/vibration-condition-monitoring-using-your-phone/</link> <comments>http://blog.prosig.com/2010/05/14/vibration-condition-monitoring-using-your-phone/#comments</comments> <pubDate>Fri, 14 May 2010 11:40:36 +0000</pubDate> <dc:creator>Don Davies</dc:creator> <category><![CDATA[applications]]></category> <category><![CDATA[android]]></category> <category><![CDATA[condition monitoring]]></category> <category><![CDATA[iPhone]]></category> <category><![CDATA[PROTOR]]></category> <category><![CDATA[remote]]></category> <category><![CDATA[rotating machinery]]></category> <category><![CDATA[smartphone]]></category> <category><![CDATA[turbine]]></category> <category><![CDATA[vibration]]></category> <category><![CDATA[vibration monitoring]]></category> <category><![CDATA[VNC]]></category> <category><![CDATA[VPN]]></category><guid
isPermaLink="false">http://blog.prosig.com/?p=811</guid> <description><![CDATA[Ever been lying on the beach and begun to wonder about the state of your LP turbines? Or out on business and anxious to know if that troublesome exciter bearing...]]></description> <wfw:commentRss>http://blog.prosig.com/2010/05/14/vibration-condition-monitoring-using-your-phone/feed/</wfw:commentRss> <slash:comments>0</slash:comments> </item> <item><title>Measurement And Analysis Of Torsional Vibration</title><link>http://blog.prosig.com/2008/10/17/measurement-and-analysis-of-torsional-vibration/</link> <comments>http://blog.prosig.com/2008/10/17/measurement-and-analysis-of-torsional-vibration/#comments</comments> <pubDate>Fri, 17 Oct 2008 07:44:13 +0000</pubDate> <dc:creator>Adrian Lincoln</dc:creator> <category><![CDATA[signal processing]]></category> <category><![CDATA[angle domain]]></category> <category><![CDATA[crankshaft]]></category> <category><![CDATA[gearbox]]></category> <category><![CDATA[nvh]]></category> <category><![CDATA[orders]]></category> <category><![CDATA[P8000]]></category> <category><![CDATA[powertrain]]></category> <category><![CDATA[pulse edge]]></category> <category><![CDATA[rotating machinery]]></category> <category><![CDATA[tacho]]></category> <category><![CDATA[tachometer]]></category> <category><![CDATA[torsional vibration]]></category> <category><![CDATA[vibration]]></category> <category><![CDATA[waterfall]]></category><guid
isPermaLink="false">http://blog.prosig.com/?p=103</guid> <description><![CDATA[Torsional vibration is of key importance in the area of vehicle development and refinement. The main contributory source is the engine where periodically occurring combustion cycles cause variation in the...]]></description> <wfw:commentRss>http://blog.prosig.com/2008/10/17/measurement-and-analysis-of-torsional-vibration/feed/</wfw:commentRss> <slash:comments>13</slash:comments> </item> <item><title>Shaft Displacement Measurement Using A PROTOR System</title><link>http://blog.prosig.com/2008/06/04/shaft-displacement-measurement-using-a-protor-system/</link> <comments>http://blog.prosig.com/2008/06/04/shaft-displacement-measurement-using-a-protor-system/#comments</comments> <pubDate>Wed, 04 Jun 2008 10:49:36 +0000</pubDate> <dc:creator>Don Davies</dc:creator> <category><![CDATA[applications]]></category> <category><![CDATA[signal processing]]></category> <category><![CDATA[condition monitoring]]></category> <category><![CDATA[data acquisition hardware]]></category> <category><![CDATA[displacement probe]]></category> <category><![CDATA[eddy current probes]]></category> <category><![CDATA[eddy probe]]></category> <category><![CDATA[oil whirl]]></category> <category><![CDATA[orbit plot]]></category> <category><![CDATA[PROTOR]]></category> <category><![CDATA[rotating machinery]]></category> <category><![CDATA[rotating shaft]]></category> <category><![CDATA[rotor shaft]]></category> <category><![CDATA[runout]]></category> <category><![CDATA[shaft]]></category> <category><![CDATA[shaft surface]]></category> <category><![CDATA[shaft vibration]]></category> <category><![CDATA[signal conditioning]]></category> <category><![CDATA[turbine]]></category> <category><![CDATA[vibration measurement]]></category> <category><![CDATA[vibration monitoring]]></category><guid
isPermaLink="false">http://blog.prosig.com/?p=65</guid> <description><![CDATA[Shaft displacement is an important vibration measurement for rotating machines. Shaft displacement is usually monitored by non-contact shaft displacement probes such as eddy-current probes. These probes produce a voltage proportional...]]></description> <wfw:commentRss>http://blog.prosig.com/2008/06/04/shaft-displacement-measurement-using-a-protor-system/feed/</wfw:commentRss> <slash:comments>6</slash:comments> </item> <item><title>Vibration Monitoring Phase Measurement And The Tacho Signal</title><link>http://blog.prosig.com/2008/03/04/vibration-monitoring-phase-measurement-and-the-tacho-signal/</link> <comments>http://blog.prosig.com/2008/03/04/vibration-monitoring-phase-measurement-and-the-tacho-signal/#comments</comments> <pubDate>Tue, 04 Mar 2008 09:52:09 +0000</pubDate> <dc:creator>Dr Colin Mercer</dc:creator> <category><![CDATA[signal processing]]></category> <category><![CDATA[Fourier]]></category> <category><![CDATA[modulus]]></category> <category><![CDATA[orders]]></category> <category><![CDATA[phase]]></category> <category><![CDATA[rotating machinery]]></category> <category><![CDATA[speed signal]]></category> <category><![CDATA[tacho]]></category> <category><![CDATA[vibration]]></category><guid
isPermaLink="false">http://blog.prosig.com/2008/03/04/vibration-monitoring-phase-measurement-and-the-tacho-signal/</guid> <description><![CDATA[Any vibration signal may be analyzed into amplitude and phase as a function of frequency. The phase represents fifty percent of the information so it is most important to measure...]]></description> <wfw:commentRss>http://blog.prosig.com/2008/03/04/vibration-monitoring-phase-measurement-and-the-tacho-signal/feed/</wfw:commentRss> <slash:comments>5</slash:comments> </item> <item><title>Orders v Time – Comparing Overall Levels</title><link>http://blog.prosig.com/2007/10/23/orders-v-time-comparing-overall-levels/</link> <comments>http://blog.prosig.com/2007/10/23/orders-v-time-comparing-overall-levels/#comments</comments> <pubDate>Tue, 23 Oct 2007 13:33:06 +0000</pubDate> <dc:creator>Dr Colin Mercer</dc:creator> <category><![CDATA[signal processing]]></category> <category><![CDATA[Hanning]]></category> <category><![CDATA[hopping FFT]]></category> <category><![CDATA[nvh]]></category> <category><![CDATA[orders]]></category> <category><![CDATA[rotating machinery]]></category> <category><![CDATA[rundown]]></category> <category><![CDATA[runup]]></category><guid
isPermaLink="false">http://blog.prosig.com/2007/10/23/orders-v-time-comparing-overall-levels/</guid> <description><![CDATA[By combining a speed signal with a data signal and using the Short Time FFT algorithm (Hopping FFT), it is possible to extract order data directly as a function of...]]></description> <wfw:commentRss>http://blog.prosig.com/2007/10/23/orders-v-time-comparing-overall-levels/feed/</wfw:commentRss> <slash:comments>4</slash:comments> </item> <item><title>Measuring Torsional Crank Shaft Jitter</title><link>http://blog.prosig.com/2007/06/24/measuring-torsional-crank-shaft-jitter/</link> <comments>http://blog.prosig.com/2007/06/24/measuring-torsional-crank-shaft-jitter/#comments</comments> <pubDate>Sun, 24 Jun 2007 07:43:54 +0000</pubDate> <dc:creator>Chris Mason</dc:creator> <category><![CDATA[applications]]></category> <category><![CDATA[signal processing]]></category> <category><![CDATA[crankshaft]]></category> <category><![CDATA[jitter]]></category> <category><![CDATA[nvh]]></category> <category><![CDATA[orders]]></category> <category><![CDATA[rotating machinery]]></category> <category><![CDATA[tachometer]]></category> <category><![CDATA[torsional vibration]]></category> <category><![CDATA[vibration]]></category><guid
isPermaLink="false">http://blog.prosig.com/2007/11/19/measuring-torsional-crank-shaft-jitter/</guid> <description><![CDATA[Using Prosig’s P8000 series data acquisition system with DATS signal analysis software, torsional analysis (crank jitter) was performed on an automotive engine attached to an engine dynamometer. The significance of...]]></description> <wfw:commentRss>http://blog.prosig.com/2007/06/24/measuring-torsional-crank-shaft-jitter/feed/</wfw:commentRss> <slash:comments>0</slash:comments> </item> <item><title>Updated Protor System For Ringhals, Sweden</title><link>http://blog.prosig.com/2006/10/03/updated-protor-system-for-ringhals-sweden/</link> <comments>http://blog.prosig.com/2006/10/03/updated-protor-system-for-ringhals-sweden/#comments</comments> <pubDate>Tue, 03 Oct 2006 15:35:58 +0000</pubDate> <dc:creator>Don Davies</dc:creator> <category><![CDATA[news]]></category> <category><![CDATA[condition monitoring]]></category> <category><![CDATA[power station]]></category> <category><![CDATA[PROTOR]]></category> <category><![CDATA[ringhals]]></category> <category><![CDATA[rotating machinery]]></category> <category><![CDATA[sweden]]></category> <category><![CDATA[vibration monitoring]]></category><guid
isPermaLink="false">http://blog.prosig.com/2006/10/03/updated-protor-system-for-ringhals-sweden/</guid> <description><![CDATA[Prosig installed a PROTOR system at the Ringhals1 reactor in Sweden in 1992. This system was based on the PROTOR2 level of hardware and software and consisted of a Sun...]]></description> <wfw:commentRss>http://blog.prosig.com/2006/10/03/updated-protor-system-for-ringhals-sweden/feed/</wfw:commentRss> <slash:comments>0</slash:comments> </item> <item><title>Torsional Vibration, Tacho Pulses And Aliasing</title><link>http://blog.prosig.com/2006/01/12/torsional-vibration-tacho-pulses-and-aliasing/</link> <comments>http://blog.prosig.com/2006/01/12/torsional-vibration-tacho-pulses-and-aliasing/#comments</comments> <pubDate>Thu, 12 Jan 2006 15:44:34 +0000</pubDate> <dc:creator>Dr Colin Mercer</dc:creator> <category><![CDATA[signal processing]]></category> <category><![CDATA[gears]]></category> <category><![CDATA[nvh]]></category> <category><![CDATA[orders]]></category> <category><![CDATA[rotating machinery]]></category> <category><![CDATA[runup]]></category> <category><![CDATA[shaft encoder]]></category> <category><![CDATA[shafts]]></category> <category><![CDATA[tachometer]]></category> <category><![CDATA[torsional vibration]]></category> <category><![CDATA[vibration]]></category> <category><![CDATA[waterfalls]]></category><guid
isPermaLink="false">http://blog.prosig.com/2006/01/12/torsional-vibration-tacho-pulses-and-aliasing/</guid> <description><![CDATA[With shafts, gears and the like, the general method of determining the rotational speed is to use some form of tachometer or shaft encoder. These give out a pulse at...]]></description> <wfw:commentRss>http://blog.prosig.com/2006/01/12/torsional-vibration-tacho-pulses-and-aliasing/feed/</wfw:commentRss> <slash:comments>3</slash:comments> </item> <item><title>Analyzing Shaft Twist And Repairing Damaged Tachos</title><link>http://blog.prosig.com/2005/10/19/analyzing-shaft-twist-and-repairing-damaged-tachos/</link> <comments>http://blog.prosig.com/2005/10/19/analyzing-shaft-twist-and-repairing-damaged-tachos/#comments</comments> <pubDate>Wed, 19 Oct 2005 09:22:40 +0000</pubDate> <dc:creator>Dr Colin Mercer</dc:creator> <category><![CDATA[applications]]></category> <category><![CDATA[signal processing]]></category> <category><![CDATA[Butterworth]]></category> <category><![CDATA[orders]]></category> <category><![CDATA[phaseless]]></category> <category><![CDATA[rotating machinery]]></category> <category><![CDATA[runup]]></category> <category><![CDATA[shaft]]></category> <category><![CDATA[shaft encoder]]></category> <category><![CDATA[tachometer]]></category> <category><![CDATA[torsional vibration]]></category> <category><![CDATA[vibration]]></category><guid
isPermaLink="false">http://blog.prosig.com/2005/10/19/analyzing-shaft-twist-and-repairing-damaged-tachos/</guid> <description><![CDATA[A shaft has been instrumented with two shaft encoders, one at each end. Each shaft encoder gives out a once/rev pulse and a 720 pulses/rev signal. Each signal was digitised...]]></description> <wfw:commentRss>http://blog.prosig.com/2005/10/19/analyzing-shaft-twist-and-repairing-damaged-tachos/feed/</wfw:commentRss> <slash:comments>1</slash:comments> </item> <item><title>Phase Between Signals</title><link>http://blog.prosig.com/2005/08/09/phase-between-signals/</link> <comments>http://blog.prosig.com/2005/08/09/phase-between-signals/#comments</comments> <pubDate>Tue, 09 Aug 2005 17:08:39 +0000</pubDate> <dc:creator>Dr Colin Mercer</dc:creator> <category><![CDATA[signal processing]]></category> <category><![CDATA[phase]]></category> <category><![CDATA[rotating machinery]]></category> <category><![CDATA[tachometer]]></category><guid
isPermaLink="false">http://blog.prosig.com/2005/08/09/phase-between-signals/</guid> <description><![CDATA[The following article was written in response to a question from a visitor to the website. The gentleman in question had been reading some of the Prosig signal processing articles...]]></description> <wfw:commentRss>http://blog.prosig.com/2005/08/09/phase-between-signals/feed/</wfw:commentRss> <slash:comments>4</slash:comments> </item> <item><title>Average Waterfalls Or Average Orders?</title><link>http://blog.prosig.com/2005/06/14/average-waterfalls-or-average-orders/</link> <comments>http://blog.prosig.com/2005/06/14/average-waterfalls-or-average-orders/#comments</comments> <pubDate>Tue, 14 Jun 2005 20:51:52 +0000</pubDate> <dc:creator>Dr Colin Mercer</dc:creator> <category><![CDATA[signal processing]]></category> <category><![CDATA[FFT]]></category> <category><![CDATA[Hanning]]></category> <category><![CDATA[nvh]]></category> <category><![CDATA[orders]]></category> <category><![CDATA[rotating machinery]]></category><guid
isPermaLink="false">http://blog.prosig.com/2005/06/14/average-waterfalls-or-average-orders/</guid> <description><![CDATA[One would expect that averaging waterfalls and then extracting orders would give the same result as extracting orders from individual waterfalls and then averaging them. This is not the case....]]></description> <wfw:commentRss>http://blog.prosig.com/2005/06/14/average-waterfalls-or-average-orders/feed/</wfw:commentRss> <slash:comments>0</slash:comments> </item> <item><title>Measuring Torsional Twist &amp; Vibration Along a Shaft or Through a Geartrain</title><link>http://blog.prosig.com/2002/05/15/torsional-vibration-example/</link> <comments>http://blog.prosig.com/2002/05/15/torsional-vibration-example/#comments</comments> <pubDate>Wed, 15 May 2002 10:10:09 +0000</pubDate> <dc:creator>Dr Colin Mercer</dc:creator> <category><![CDATA[applications]]></category> <category><![CDATA[signal processing]]></category> <category><![CDATA[engine]]></category> <category><![CDATA[gear]]></category> <category><![CDATA[nvh]]></category> <category><![CDATA[orders]]></category> <category><![CDATA[rotating machinery]]></category> <category><![CDATA[shaft]]></category> <category><![CDATA[shaft encoder]]></category> <category><![CDATA[tachometer]]></category> <category><![CDATA[torsional vibration]]></category> <category><![CDATA[twist]]></category> <category><![CDATA[vibration]]></category><guid
isPermaLink="false">http://blog.prosig.com/2002/05/15/torsional-vibration-example/</guid> <description><![CDATA[The measurement of the twist angle between two points along a shaft or through a gear train may be derived from a pair of tacho signals, one at each end...]]></description> <wfw:commentRss>http://blog.prosig.com/2002/05/15/torsional-vibration-example/feed/</wfw:commentRss> <slash:comments>3</slash:comments> </item> <item><title>Frequency, Hertz &amp; Orders</title><link>http://blog.prosig.com/2002/02/03/frequency-hertz-orders/</link> <comments>http://blog.prosig.com/2002/02/03/frequency-hertz-orders/#comments</comments> <pubDate>Sun, 03 Feb 2002 17:09:46 +0000</pubDate> <dc:creator>Dr Colin Mercer</dc:creator> <category><![CDATA[signal processing]]></category> <category><![CDATA[FFT]]></category> <category><![CDATA[Nyquist]]></category> <category><![CDATA[orders]]></category> <category><![CDATA[rotating machinery]]></category><guid
isPermaLink="false">http://blog.prosig.com/2002/02/03/frequency-hertz-orders/</guid> <description><![CDATA[The most common form of digitising data is to use a regular time based method. That is data is sampled at a constant rate specified as a number of samples/second....]]></description> <wfw:commentRss>http://blog.prosig.com/2002/02/03/frequency-hertz-orders/feed/</wfw:commentRss> <slash:comments>0</slash:comments> </item> <item><title>High Pass Filtering And Tacho Signals</title><link>http://blog.prosig.com/2001/06/06/high-pass-filtering-and-tacho-signals/</link> <comments>http://blog.prosig.com/2001/06/06/high-pass-filtering-and-tacho-signals/#comments</comments> <pubDate>Wed, 06 Jun 2001 17:13:29 +0000</pubDate> <dc:creator>Dr Colin Mercer</dc:creator> <category><![CDATA[signal processing]]></category> <category><![CDATA[Butterworth]]></category> <category><![CDATA[engine]]></category> <category><![CDATA[gearbox]]></category> <category><![CDATA[nvh]]></category> <category><![CDATA[phaseless]]></category> <category><![CDATA[rotating machinery]]></category> <category><![CDATA[tacho]]></category> <category><![CDATA[tachometer]]></category> <category><![CDATA[vibration]]></category><guid
isPermaLink="false">http://blog.prosig.com/2001/06/06/high-pass-filtering-and-tacho-signals/</guid> <description><![CDATA[It is sometimes necessary to pass a signal through a high pass filter to eliminate low frequency signals. These may arise for instance from whole body vibrations when perhaps our...]]></description> <wfw:commentRss>http://blog.prosig.com/2001/06/06/high-pass-filtering-and-tacho-signals/feed/</wfw:commentRss> <slash:comments>2</slash:comments> </item> </channel> </rss>
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