7.1 Control systems Flashcards
what are control systems?
one or more devices that guide other devices or systems
what do control systems allow?
allow for the completion of various tasks in an automatic manner through an input, process, output system
what may control systems include
- sensors - to gain feedback from the environment
- motors - control any actuators in an appropriate manner
example of a control system and how it works
automatic doors:
- sensors uses infrared or microwave signals that bounce off objects to determine motion
- sensor forwards signal to microprocessor
interrupt definition
a signal sent to the control system indicating that the system needs to attend to the specific signal immediatel y
process control definition
the control the control of one or more variables in a system
example of open loop feedback
a tank with a manual value that controls the heat dissipated by a coil used to heat the liquid in the tank
example of open loop feedback
a tank with a manual value that controls the heat dissipated by a coil used to heat the liquid in the tank
example of closed-loop feedback
the actual temperature of the liquid is detected using temperature sensors and the coil temperature is adjusted to achieve the desired liquid temperature
device drivers definition
computer programs used to control a computer device of any kind
what do device drivers allow
allow operating systems and other programs to access the devices with a layer of abstraction
what makes device drivers so efficient
they are operating system specific
limitation of device drivers
they are hardware-dependent
why are heating systems good
- allows for the conservation of energy
- have the potential to connect to the internet
properties of a taxi meter system
- seat sensors used to prevent taxi drivers not using taxi meters
- credit cards supported, radio communication, GPS system
