HW CE_4 - HW/CE# 4 Due Wednesday, March 24, 2010 1. Suppose...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
HW/CE# 4 Due Wednesday, March 24, 2010 1. Suppose we have the following specifications: M p < 40% settling time t s < 5 sec rise time t r < 1.0 sec Choose phase margin PM and crossover frequency ω c so that we meet the above. Use the “more exact” tabulations on the second page of the reference sheets. Hint: start with ζ = 0.30. 2. Assume G(s) =KL(s) , shown below, is the open-loop gain in a unity feedback system. (Note that this is the same G(s) you did the root locus and Bode plot for in the last homework exercise.) Make hand sketches showing the Nyquist plots for: ) 125 10 ( ) ( ) ( 2 + + = = s s s K s KL s G For K = 1000, 1250, and 1500. Show critical points (crossover values on the real axis) for all three cases. Describe closed loop system stability for the 3 cases, i.e., marginally stable, unstable, etc. Verify your sketches by submitting MATLAB generated Nyquist plots. 3. Suppose we have a plant G(s): ) 16 . 1 ( 4 . 8 ) ( + = s s s G in a unity feedback system. a)
Background image of page 1

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

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 3

HW CE_4 - HW/CE# 4 Due Wednesday, March 24, 2010 1. Suppose...

This preview shows document pages 1 - 2. Sign up to view the full document.

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