26_freqgW12 - Page 1 of 3 Computer Shortcut freqg.p CHE 361...

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Page 1 of 3 0.2 2 ( ) for the freqency range of from 0.01 to 10 rad/min 10 1 s e G s s ω = + ( ) ( ) ( ) s N s G s e D s θ = Computer Shortcut: freqg.p CHE 361 Task: Use the MATLAB "program" file freqg.p to determine the frequency response of: Then check the amplitude ratio and phase angle at 2 rad/min by "hand" using the shortcut method. To "run" the program, simply type >> freqg at the prompt in the MATLAB Command Window. Here's what you should see, with bold letters indicating what you enter: >> freqg |----------------------------------------------------| | MATLAB Program "freqg" | | Uses "shortcut" method to calculate frequency | | response of G(s) where G(s) has a polynomial | | numerator and denominator and a single time delay. | | Saves results freq,RePart,ImPart,AR,Phase in deg | | in columns in a file specified by the user. | | Example: 2s^2 + 0s + 1 = [2, 0, 1] | | Dr. K.L. Levien Nov. 12, 2003 | | Revisions: 11/8/04, 2/20/08, 2/15/12 | | Chemical Engineering, Oregon State University | |----------------------------------------------------| --------------------------------------------- Enter numerator coefficient vector: [2] Numerator Vector = [2] Enter denominator coefficient vector: [10, 1] Denominator Vector = [10, 1] Enter time delay: 0.2 Time Delay = 0.2 Enter minimum frequency, rad/time (0.01) =
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