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- W4255293822 abstract "The objective of process control is to keep key process-operating parameters within narrow bounds of the reference value or setpoint. This chapter describes the theory behind control circuits to maintain automatic control over a process. The basis of automatic control is the control loop. A control loop for a given process must have at least one sensor, a controller, and a control element to which the results are applied. A good example of automatic control is electric heating of a house in a cold environment, a process where a single variable is controlled. A thermostat (sensor) monitors the temperature. When the temperature drops below the setpoint, a switch is closed and the heater comes on. When the temperature rises above the setpoint, the switch opens and the heater is turned off. The difference between the actual value and the setpoint is called the error. The controller reads the error and makes a decision. The action taken can be very simple to very complicated, depending on the system and the size of the acceptable error." @default.
- W4255293822 created "2022-05-12" @default.
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- W4255293822 date "2018-01-01" @default.
- W4255293822 modified "2023-10-16" @default.
- W4255293822 title "Process Control" @default.
- W4255293822 doi "https://doi.org/10.1016/b978-0-12-814238-7.00024-6" @default.
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