ME5659_LecSuppl_FreqResponseVsLaplace

ME5659_LecSuppl_FreqResponseVsLaplace - system Phase Margin...

Info iconThis preview shows pages 1–5. Sign up to view the full content.

View Full Document Right Arrow Icon
71 Comparison of Transfer Function and Frequency Response Function • Transfer Function G ( s ) is a complex function with the complex variable s. • Laplace Domain • A function of complex variable “ s • Performance specifications: Poles and Zeros • Frequency Response Function •G ( j ω ) is a complex function of frequency. • Frequency Domain • A function of variable ω (frequency) • Performance specifications: Resonant Frequency and Bandwidth
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
72 Information from Bode Plot of closed Loop system • Bandwidth • Resonant frequency • Damping ratio • Natural frequency () ( ) 2 r 1 2 2 1 0.707 1 2 ζ ω = < = = n r P G M
Background image of page 2
73 Information from Bode Plot of Open Loop
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 4
Background image of page 5
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: system Phase Margin G a i n M a r g i n The closed loop system is stable or not 74 Information from Root Locus of Open Loop system How many Poles does the Open Loop system have ? How many Zeros does the Open Loop system have ? Where is the direction of the roots of the characteristic equation, going toward RHP, or LHP ? When the system becomes unstable ? ( what value of K makes the system unstable) 75 Information from Nyquist of Open Loop system Does it encircle the point (-1,0) what is the direction of the contour ( CW, CCW)...
View Full Document

This note was uploaded on 05/26/2010 for the course ME 5659 taught by Professor Jalili during the Spring '10 term at Northeastern.

Page1 / 5

ME5659_LecSuppl_FreqResponseVsLaplace - system Phase Margin...

This preview shows document pages 1 - 5. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online