exam2_practice

# exam2_practice - Between t=0 and t=1 second perform an FFT...

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5/10/10 Problem 2 The resistance of a thermoresistor in water is measured six times. The six measurement values were: 24.991Ω, 25.047Ω, 25.088Ω, 25.015Ω, 25.133Ω, and 24.940Ω. Determine the 90% confidence interval of the mean resistance of the measurement. Confidence interval: Sample standard deviation: Small sample statistics

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5/10/10 Range 0-100lb Full-scale output 30 mV Linearity 0.1% FSOR Hysteresis 0.08% FSOR Repeatability 0.03% FSOR Zero balance 2% FSOR Temperature effect on zero 0.002% FSOR/°F Temperature effect on span 0.002% of reading/°F Problem 3 A force measurement system has the elemental errors below, expressed as standard deviations of their associated 95% CI. Estimate the overall instrument error for this system based on the given information. Recall that standard deviations are not summed, but the square root of the summed variances is taken
5/10/10 Problem 4 In Excel, generate 128 values of the function Fourier Analysis

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Unformatted text preview: Between t=0 and t=1 second perform an FFT on the function and plot the magnitude versus the frequency. Now repeat using more values of the function (how many will you need?). Describe and explain differences between the two plots. If the signal is sampled at a 5/10/10 Problem 5 For the function provided in Problem 4, a sampling rate of 30 Hz is taken. Determine the Nyquist and alias frequencies that result. 5/10/10 Problem 6 A Wheatstone bridge is used to determine accurately the value of an unknown resistance Ra. If upon initial null balance R1 is 127.5Ω, and if when Rb and R2 are interchanged, null balance is achieved when R1 is 157.9Ω, what is the value of the unknown resistance Ra? Problem 7 If a resistive element in a Wheatstone bridge measures 750Ω, the other elements are all 500Ω, and the bridge excitation is 10 V, what will be the measured voltage across the bridge?...
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exam2_practice - Between t=0 and t=1 second perform an FFT...

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