In order to stabilize the system, we use a PD controller in cascade with the feed-forward chain as shown in the following block diagram: U(s) Y(s) 1 K(1+ s) s3 +7 s2 - 3 s Determine the range of K in the PD controller that makes the system stable. (K is always positive) Select one: O a. The system is never stable O b. K <3.5 O c. K >3 O d. K > 3.5 O e. K > 21

In order to stabilize the system, we use a PD controller in cascade with the feed-forward chain as shown in the following block diagram: U(s) Y(s) 1 K(1+ s) s3 +7 s2 - 3 s Determine the range of K in the PD controller that makes the system stable. (K is always positive) Select one: O a. The system is never stable O b. K <3.5 O c. K >3 O d. K > 3.5 O e. K > 21

Delmar's Standard Textbook Of Electricity

7th Edition

ISBN:9781337900348

Author:Stephen L. Herman

Publisher:Stephen L. Herman

Chapter13: Magnetic Induction

Section: Chapter Questions

Problem 1PA

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Question

O False
In order to stabilize the system, we use a PD controller in cascade with the feed-forward chain as shown in the following block diagram:
U(s)
Y(s)
1
K(1+ s)
53 + 7 s2 - 3 s
Determine the range of K in the PD controller that makes the system stable. (K is always positive)
Select one:
O a. The system is never stable
O b. K <3.5
O c.K >3
O d. K > 3.5
O e. K > 21
Giving that the input to the shown system is f(t) = sin(wt) and the output is the displacement y(t), determine Y(s). Hint: Start by getting the
transfer function Y(s)/F(s).
+ Y(t)

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