PID controllers are useful in the automotive industry for maintaining a constant speed or separation distance during cruise control. The controller will measure the actual distance compared to the desired distance and adjust the speed in order to minimize the delta.
PID controllers can help a robot achieve a desired movement or position. The PID controller will measure how far off the course the robot is, and adjust the steering to remain on the course.
A PID can be used to continually measure and adjust temperature. The PID controller will measure the current temperature vs. the desired temperature and adjust the heat source in order to minimize the difference.
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