Solutions of Midterm Exam
Subject : Control System Engineering 1, Lecturer : Prof. Youngjin Choi, Date : Apr. 22, 2013 (Contact e-mail :xxxx@xxxxang.ac.kr)
Problem 1 (20pt) Draw both polar plot and bode plot of the following transfer function: G(s) = 1 s(s + 1) (1)
Solution of Problem 1 (20pt) 1. (5pt) Consider G(j¥ø) = 1 j¥ø(j¥ø + 1) (2)
2. (5pt) The magnitude and phase are obtained for ¥ø ¡Ã 0 as follow: |G(j¥ø)| = 1 ¥ø 1 + ¥ø2 ¡î ¡æ |G(j¥ø)|dB = 20 log10 ¥ø 20 log10 1 + ¥ø2 (3) (4)
¡ÐG(j¥ø) = ...
|