MEC321 Flashcards
Define a sensor
Measure a physical variable and represent this in a useful format (often a voltage)
Define an actuator
Adjust the behaviour of the system, usually by supplying energy or doing work
Define controller
Decide how to adjust the behaviour of the system, usually using sensors
Define the process
The device, plant, or system under control
Define feedback control system
If the controller uses a sensor to measure the response of the process
Define an open-loop control system
If the controller does not use the measured response
Define a signal
Variables that are a function of time
Define a system
Elements that are interconnected with signals
What is a disturbance signal?
an unwanted input that affects the system output signal
Define a closed-loop control system
Utilises a measure of the actual output which may then
be compared to the desired output. This comparison then influences the subsequent input to the system.
Define a signal
Variables that are a function of time
Define a system
Elements that are interconnected with signals
What is a disturbance signal?
an unwanted input that affects the system output signal
Define a closed-loop control system
Utilises a measure of the actual output which may then
be compared to the desired output. This comparison then influences the subsequent input to the system.
0.5 ± 1j stable or unstable root?
unstable as a positive real part
