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lecture_18

# lecture_18 - Bode plot example...

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ME 421 Mechanical Dynamics and Control Fall 2006, Lecture 18 Today’s topics (Sec. 9-1, 9-2, 9-3); • Frequency-domain analysis: Bode Plot Application example of frequency-domain analysis: Vibration isolation;

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Frequency-Response of High-Order Transfer Functions
Concept of Bode-Plot s Concept; s MATLAB example; s Relations of poles-zero locations with Bode-plot; s DC-Gain on the bode-plot; s Concept of Bandwidth;

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Generalization in the Inputs
Generalization in the Inputs

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Fourier transform and Frequency Response
Application: Vibration Isolation

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Application: Vibration Isolation
Quiz 5

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H:\CourseWork\ME421_Fall06\Lecture\Lecture18_Exmp.m Page 1 October 19, 2006 10:01:42 AM %==================================== % ME 421 Fall 06---Lecture 18
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Unformatted text preview: % Bode plot example % ==================================== xi = 1; %0.05 0.5 1 omega_n = 10; k_dc = 10; % Define the transfer function model; My_Num = [k_dc*omega_n^2]; My_Den = [1 2*xi*omega_n omega_n^2]; My_TF = tf(My_Num, My_Den); % Plot the bode plot; figure(1), bode(My_TF); hold on; % Define a higher-order transfer function with a pair of complex conjugate % zeros; xi_z = 0.01; omega_n_z = 300; k_g = 10; p_1 = 10; xi_2 = 0.01; %0.05 0.5 1 omega_n_2 = 500; My_Num = k_g*[1 2*xi_z*omega_n_z omega_n_z^2]; My_Den = conv([1 p_1], [1 2*xi_2*omega_n_2 omega_n_2^2]); My_TF = tf(My_Num, My_Den); figure(2), bode(My_TF); % Locate the poles and zeros % pole(My_TF) % zero(My_TF)...
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