APC UCCS Temperature Control Manual de usuario descargar pdf (Pagina 9)

ECE4510/ECE5510, INTRODUCTION TO FEEDBACK CONTROL 1–9

• Suppose you load the trunk with all your ECE4510/ECE5510 notes

and the car becomes more sluggish.

e.g.,thegain“10”becomes“9”

• r (t) = 55, w(t) = 0 # y

(t) = 49.5. ≈ 10 % error...Notgood.

• r (t) = 55, w(t) = 1 # y

(t) = ...

6. Iterate design. Go to step #4.

Auto cruise-control example (attempt #2)

Our ﬁrst attempt at the cruise-control design didn’t go too well.

So, we try again, with a different approach.

4. Second attempt = Feedback controller

Compensator

$% &

100

r (t)

(t)

w(t)

u(t)

0.5

Multiply your output error by 100; feedback gain = 100

(t) = 10u(t) − 5w(t)

u(t) = 100(r(t) − y

(t))

so, y

(t) = 1000r(t) − 1000y

(t) − 5w(t)

1001y

(t) = 1000r(t) − 5 w(t)

(t) = 0.999r(t) − 0.005w(t)

Lecture notes prepared by and copyright

! 1998–2013, Gregory L. Plett and M. Scott Trimboli

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APC UCCS Temperature Control Manual de usuario Pagina 9