Recent content by xopher

I actually just figured it out!. If you create a transfer function using G and C, you can easily match it up to the characteristic equation for 2nd order systems and solve accordingly. I double checked this on MATLAB so i know its the correct approach.

Here's the best part... i can't seem to verify this on matlab. Either the code is wrong or I'm wrong. I tried using my prof's example on MATLAB and its still inconclusive...

I've figured it out... I don't exactly know what the explanation is but I'm dividing the characteristic equation with a 2nd order characteristic equation based off the condition ts = 10,20. After you crunch the numbers, you'll find the range of K from 10 - 20 seconds.

Homework Statement Homework Equations See below The Attempt at a Solution Root Locus? Easy Peasy right? Based on provided equation G(s), i solved the coordinates of the root locus diagram using quadratic equation. For the 2nd part of the question, i have to find gain at which rise time...

Thanks rudeman, Now that you mention it, i do vaguely remember my professor mentioning this. Any idea where I can find some material to read as a refresher?

I think I've figured out the limit of stability portion. http://imgur.com/MOSEEqG (please note there are 2 pictures) Any ideas on how to find the range of k within the settling time?

Homework Statement Given G(s) = 1/[(s^2+s+4)(s+6)] and C(s) = k, find the limit of stability of k. Also, what is the range of k such that the settling time is between 10 and 20 seconds. Homework Equations Provided above The Attempt at a Solution I have attempted to set this...