Linear Control
Linear control systems use linear negative feedback to produce a control signal mathematically based on other variables, with a view to maintain the controlled process within an acceptable operating range.
The output from a linear control system into the controlled process may be in the form of a directly variable signal, such as a valve that may be 0 or 100% open or anywhere in between. Sometimes this is not feasible and so, after calculating the current required corrective signal, a linear control system may repeatedly switch an actuator, such as a pump, motor or heater, fully on and then fully off again, regulating the duty cycle using pulse-width modulation.
Read more about this topic: Control System
Famous quotes containing the word control:
“... the black girls didnt get these pills because their black ministers were up on the pulpit saying that birth control pills were black genocide. What Im saying is that black men have exploited black women.... They didnt want them to have any choice about their reproductive health. And if you cant control your reproduction, you cant control your life.”
—Joycelyn Elders (b. 1933)