Register to reply

Plotting the Nyquist Diagram - Stuck

by thomas49th
Tags: diagram, nyquist, plotting, stuck
Share this thread:
thomas49th
#1
Apr18-12, 07:27 AM
P: 656
1. The problem statement, all variables and given/known data
http://gyazo.com/8187e80897fe361d555dbb9e5399366d

Okay, quite stuck here. Spent a few hours with the notes and tried some websites, but I'm still not confident in plotting Nyquist Diagrams
2. Relevant equations
N = Z-P


3. The attempt at a solution
Well, at w=0, gain is -2 and at w= ∞ gain = 0.

We also have a pole at s=0.5 in the right half plane... so P=1, correct? As we have an unstable pole?

As for the phase it goes from 0 to -90. WHY is calculating the phase important, where is this show on the Nyquist plot!?


Do I now have enough information to draw it?
How would you go about drawing it?

How do I know what values to the j-axis should take? How do I know if it's meant to loop around under the real axis and back up to (0,0)

Many Thanks
Thomas


Answers:
http://gyazo.com/da99d7751508263c497af7270010228f
Phys.Org News Partner Science news on Phys.org
Fungus deadly to AIDS patients found to grow on trees
Canola genome sequence reveals evolutionary 'love triangle'
Scientists uncover clues to role of magnetism in iron-based superconductors

Register to reply

Related Discussions
Im stuck! Question a bout graphing sin and plotting points Precalculus Mathematics Homework 7
Plotting T-s Diagram Using Experimental Values Advanced Physics Homework 0
Nyquist stability. Vector addition. Bad diagram? Engineering, Comp Sci, & Technology Homework 2
Bifurcation diagram of a sin map(plotting it) Introductory Physics Homework 0
Plotting Kruskal-Szekeres diagram in Mathematica Math & Science Software 0