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Key points are: Continuous-Time Signals, Sliding Tape Method, Discrete-Time Convolution, Time Linear System, System Transition Matrix, Laplace Inverse Transform, System Transfer Function, System State Response
Typology: Exams
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Sample Exam 6: Chapters 6, 8, and 12
#1a) Convolve graphically continuous-time signals ÄÅ[ÆÇ ÈpÉIÊ-ËLÌ and ÄÍÆ.Ç/ÌjÎÂÏÍÆÇ"Ì.
#1b) Using the sliding tape method find the discrete-time convolution ÐÑÒUÓÔձРÍÒEÓ3Ô , where
ß
ÓÜÖ
ß
ÓÜÖAà
Ý áIâ/ãäåæèç§é@äMê
ß
ÓÜÖ
ß
ÓÜÖAà
Ý áIâ"ãäKå"ægçé@ä
#2A) Consider the continuous-time linear system represented in the state space form by ëLì í Ñ Æ .Ç/Ì ì í ÍÆ.Ç/Ìî
ë
Ý É
ß
î
ë í Ñ Æ Ç"Ì
í ÍÆÇ"ÌIî
ë
Ý
É)î
ê
ë í Ñ Æ ÝLïÌ
í ÍÆÝ3ïÌî
ë Þ
Ýjî
ð ÆÇ"ÌÖ°Ò
ß ÝjÔ
ë í Ñ
í Í ÆÇ/Ì î
a) Find the system transition matrix ñ\ÆòÌ , and obtain ñPÆÇ"Ì using the Laplace inverse transform.
b) Find the system transfer function.
c) Find the system state response for ÐqÆÇ"Ì\Ö³óaÆÇ"Ì and the given initial conditions.
d) Find the system output response (
ð ÆÇ/Ì ) due to ÐqÆÇ"Ì#Öõô ï
/ö÷ Æ .Ç/Ì and the given initial conditions.
#2B) Consider the discrete-time linear system represented in the state space form by ë í Ñ ÒUÓvÎAÉ·Ô
í ÍÒUÓtÎAÉ·Ô î
ë
Ý É
ø Èúùø î
ë í Ñ Ò EÓLÔ
í ÍÒEÓ3Ô î
ë ß
Ý î
ê
ë í Ñ Ò UÝÔ
í ÍÒUÝÔ î
ë
É Þ î
ð Ò-ÓLÔFÖ°ÒEÝ
ë í Ñ Ò UÓLÔ
í Í ÒUÓLÔ î
a) Find the system transition matrix ñ\Æû3Ì. Obtain ñxÒEÓ3Ô via the ü -transform
b) Find the system transfer function.
c) Find the system output response (
ð ÒEÓ3Ô ) due to ÐjÒEÓLÔMÖ7ý"È
þ(ÿ ^
(^) Ò-ÓLÔ and the given initial conditions.
d) Given the system represented by
ð ÒEÓÎÂËÔÎ
ð Ò-ÓiÎmàIÔÈ
ð ÒEÓÎ
ß ÔÈ
ð ÒEÓtÎ
ð ÒUÓiÎGÉKÔÈ
ð Ò-ÓLÔMÖ%ÐjÒEÓÎ
ß Ô(Îmà(ÐjÒEÓLÔ
Find the system state space form.
#3) The system open-loop system transfer function is given by
Æ@òÌ#Ö
ò ÆògÎGÉÌ"Æò\Î
Ì"Æò\Î0Ë3Ì
Assuming the unity feedback system and the system asymptotic stability for some values of the static
gain
, find the steady state step, ramp, and parabolic errors in terms of
.
Hint: Some common pairs:
ò
ê
ôï^
ö ÷ (^) ÆÇ"Ì
ò gÎ
ê
@ô ï
ö ÷ ÆÇ"Ì
ògÎ Ì
ê