The block diagram below shows a feedback controller for controlling the pitch angle 0(t) of an airplane, in which Odes is a desired pitch angle and the control input is the elevator deflection angle u(t) = 8(t). %3D K(s+1) Let C(s) = -, a proportional-integral (PI) controller with a tunable control gain K. S 1.15s + 0.177 O des C(s) s3 + 0.739s2 + 0.921s H(s) (a) Suppose that Odes is defined as a parabolic function of time, Odes(t) = t2 · us(t), where u, (t) is the unit step function. Calculate the steady-state error ess of the closed- loop system as a function of the gain K. (b) This closed-loop system is stable for 0< K< 1.27. Given that the steady-state error ess can be computed only when K is in this range, use your expression for ess from part (a) to compute the lower bound on ess; that is, find the value emin for which ess > emin .
The block diagram below shows a feedback controller for controlling the pitch angle 0(t) of an airplane, in which Odes is a desired pitch angle and the control input is the elevator deflection angle u(t) = 8(t). %3D K(s+1) Let C(s) = -, a proportional-integral (PI) controller with a tunable control gain K. S 1.15s + 0.177 O des C(s) s3 + 0.739s2 + 0.921s H(s) (a) Suppose that Odes is defined as a parabolic function of time, Odes(t) = t2 · us(t), where u, (t) is the unit step function. Calculate the steady-state error ess of the closed- loop system as a function of the gain K. (b) This closed-loop system is stable for 0< K< 1.27. Given that the steady-state error ess can be computed only when K is in this range, use your expression for ess from part (a) to compute the lower bound on ess; that is, find the value emin for which ess > emin .
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...
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