L1 - Continuous Time Signals
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19 Terms
what is a signal
a function of one or more variables that conveys info abt some usually physical phenomenon
signal examples
voltage or current in electrical circuit
position, velocity or acceleration of an object
a force or torque in a mechanical sustem
flow rate of a liquid or gas in a chemical process
a digital image/video/audio
a stock market index
one dimensional signal
a signal with one independent variable
multi dimensional signal
a signal with more than one independent variable
continuous independent variable
a signal with CIV = continuous time (eg. voltage waveform)
discrete independent variable
a signal with DIV = discrete time (eg. stock market index)
continuous dependent variable
CDV = continuous valued (eg. voltage waveform)
discrete dependent variable
DDV = discrete valued (eg. digital image)
continuous valued CT signal is said to be…
analog
a discrete valued DT is said to be…
digital
what is a system
a device that takes a signal and produces a signal
what does a system focus on
the flow of information by abstracting away everything else
are signals useful without systems
no, they’re meaningless without systems to interpret them…systems are also meaningless without signals
everyday life examples of a system
business system
inputs
investment
stock
outputs
profit/loss
jobs
computer
inputs
power
instructions
internet
outputs
electromagnetic waves
text
video
filtering
extract desired signal where the desired signal is corrupted by noise or mixed with interfering signals
remove certain unwanted components of the input signal
power systems
control the harmonics in power system
power flow analysis
power system reliability, stability
digital communication
transmitter sends binary data
1 = 1ms pulse of 5V
0 = 1ms pulse of 0V
mechatronics application of signals and systems
surveillance system
automotive vision system
dynamic sensor network
autonomous vehicle
why do engineers study signals and systems
engineers build systems to process and or manipulate signals
we need formal maths to study them
framework is necessary to ensure system will meet specs
if system fails to meet specs → neg consequences
system failure can be catastrophic