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Name
Real Time Computing Systems
EE 4770
Midterm Examination
18 March 1998,
7:309:30 CST
Alias
Problem 1
(35 pts)
Problem 2
(30 pts)
Problem 3
(35 pts)
Exam Total
(100 pts)
Good Luck!
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View Full DocumentProblem 1:
Design a system to convert temperature,
x
∈
[150 K
,
300 K], to a ﬂoating point
number,
temp
=
H
(
x
)=
x/
K, using the new Transducer Z. An algebraic model function for the
new Transducer Z is not available but a lookup table,
HtZ
,is
. Tab
le
HtZ
is a 4096element array
which stores the resistance of the sensor in ohms from a temperature of 100 K (
HtZ[0]=870
)to
400 K (
HtZ[4095]=6500
). (The temperature range covered by the lookup table is larger than is
needed for this problem.) The relationship between the array index and temperature is linear.
(The relationship between temperature and resistance is
not
linear.) An inverse table,
HtZi
is
also available; element zero,
HtZi[0]=100
, gives the temperature in Kelvins when the resistance is
870 Ω and
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