Control Systems Engineering
7th Edition
ISBN: 9781118170519
Author: Norman S. Nise
Publisher: WILEY
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Chapter 7, Problem 2P
Figure P7.2 shows the ramp input r(t) and the output c(t) of a system. Assuming the output’s steady state can be approximated by a ramp, find [Section: 7.1]
a. the steady-state error;
b. the steady-state error if the input becomes r(t) =tu(t).
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14.10. A liquor containing 15 per cent
solids is concentrated to 55 per cent
solids in a double-effect evaporator.
operating at a pressure in the second
effect of 18 kN/m². No crystals are
formed. The flowrate of feed is 2.5 kg/
s at 375 K with a specific heat capacity
of 3.75 kJ/kg K. The boiling-point rise of
the concentrated liquor is 6 deg K and the
steam fed to the first effect is at 240 kN/
m². The overall heat transfer coefficients
in the first and second effects are 1.8 and
0.63 kW/m²K. respectively. If the heat
transfer area is to be the same in each
effect, what areas should be specified?
D
A
Chapter 7 Solutions
Control Systems Engineering
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