ME345_Lecture_37

ME345_Lecture_37 - calculate the rpm of the rotating hex...

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M E 345 Spring 2008 Professor John M. Cimbala Lecture 37 04/16/2008 Today, we will : Do some example problems – rotational rate (rpm) measurement and aliasing Finish the pdf module: Measurement of Mechanical Properties – dynamometers Do some example problems – dynamometers Example Given : A “poor person’s” magnetic pickup tachometer is made from a standard hex nut on an automobile turbocharger to measure the rpm of the turbocharger. ( a ) To do : If the observed pulse rate is 5,000 pulses per second,

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Unformatted text preview: calculate the rpm of the rotating hex nut. ( b ) To do : Calculate the multiplaction factor to convert from P to N rpm . Solution : Example Given : A shaft is rotating at 2400 rpm. A single dot is painted on the end of the shaft, and a stroboscope is used to measure the rpm. To do : For each case, determine how many dots you will see, and if there is any aliasing: ( a ) 800, ( b ) 1600, ( c ) 3000, and ( d ) 4800 rpm. Solution :...
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ME345_Lecture_37 - calculate the rpm of the rotating hex...

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