EBK NUMERICAL METHODS FOR ENGINEERS
EBK NUMERICAL METHODS FOR ENGINEERS
7th Edition
ISBN: 8220100254147
Author: Chapra
Publisher: MCG
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Chapter 1, Problem 5P

Compute the velocity of a free-falling parachutist using Euler's method for the case where m = 80 kg and c = 10 kg/s. Perform the calculation from t = 0 to 20 s with a step size of 1 s. Use an initial condition that the parachutist has an upward velocity of 20 m/s at t = 0 . At t = 10 s, assume that the chute is instantaneously deployed so that the drag coefficient jumps to 60 kg/s

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Auto Controls   A union feedback control system has the following open loop transfer function where k>0 is a variable proportional gain   i. for K = 1 , derive the exact magnitude and phase expressions of G(jw).   ii) for K = 1 , identify the gaincross-over frequency (Wgc) [where IG(jo))| 1] and phase cross-overfrequency [where <G(jw) = - 180]. You can use MATLAB command "margin" to obtain there quantities.  iii) Calculate gain margin (in dB) and phase margin (in degrees) ·State whether the closed-loop is stable for K = 1 and briefly justify your answer based on the margin . (Gain marginPhase margin)   iv. what happens to the gain margin and Phase margin when you increase the value of K?you  You can use for loop in MATLAB to check that.Helpful matlab commands : if, bode, margin, rlocus   NO COPIED SOLUTIONS

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