HW10 - Texas A&M University Department of Mechanical...

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Texas A&M University Department of Mechanical Engineering MEEN 260 Measurement and Instrumentation in Mechanical Engineering Fall 2010 Assignment #10 Due Monday, November 22, 2010 Problem 1: Use the Excel spreadsheet that is on the class web site and explore the various filter- ing schemes. In particular, vary from 0 to 1 in steps of 0.2 and graph your results for . Problem 2: Suppose we have reason to believe that random noise affected the data given below. What would be a good filtering scheme? Perform comparative analysis say between a simple averaging scheme on the raw input versus a filter with memory. Choose appropriately and in particular, try at least three different values of . Determine what would be a good value or range of values for . Justify your answer. 1 12.1 21 1 . 7 31 1 . 2 41 1 . 9 5 12.1 61 1 . 8 α yk () k uk 0.5 0.5 1 + = α 1 α 1 + = α α α
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Solution November 22, 2010 2 Solution Problem 1: The original signal, l as specified in the spreadsheet DigitalFilter.xls, is shown below. Note that the signal is discretized with the discrete time
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HW10 - Texas A&M University Department of Mechanical...

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