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  2. Closed-loop controller - Wikipedia

    en.wikipedia.org/wiki/Closed-loop_controller

    A closed loop controller therefore has a feedback loop which ensures the controller exerts a control action to give a process output the same as the "reference input" or "set point". For this reason, closed loop controllers are also called feedback controllers. [3] The definition of a closed loop control system according to the British ...

  3. Control loop - Wikipedia

    en.wikipedia.org/wiki/Control_loop

    A control loop is the fundamental building block of control systems in general and industrial control systems in particular. It consists of the process sensor, the controller function, and the final control element (FCE) which controls the process necessary to automatically adjust the value of a measured process variable (PV) to equal the value of a desired set-point (SP).

  4. Control system - Wikipedia

    en.wikipedia.org/wiki/Control_system

    A closed loop controller therefore has a feedback loop which ensures the controller exerts a control action to give a process output the same as the "reference input" or "set point". For this reason, closed loop controllers are also called feedback controllers. [1] The definition of a closed loop control system according to the British ...

  5. Control theory - Wikipedia

    en.wikipedia.org/wiki/Control_theory

    The control action is the switching on/off of the boiler, but the controlled variable should be the building temperature, but is not because this is open-loop control of the boiler, which does not give closed-loop control of the temperature. In closed loop control, the control action from the controller is dependent on the process output.

  6. Control engineering - Wikipedia

    en.wikipedia.org/wiki/Control_engineering

    Although feedback is an important aspect of control engineering, control engineers may also work on the control of systems without feedback. This is known as open loop control. A classic example of open loop control is a washing machine that runs through a pre-determined cycle without the use of sensors.

  7. Sensitivity (control systems) - Wikipedia

    en.wikipedia.org/wiki/Sensitivity_(control_systems)

    A basic closed loop control system, using unity negative feedback. C(s) and G(s) denote compensator and plant transfer functions, respectively. Let () and () denote the plant and controller's transfer function in a basic closed loop control system written in the Laplace domain using unity negative feedback.

  8. Category:Classical control theory - Wikipedia

    en.wikipedia.org/wiki/Category:Classical_control...

    Closed-loop control; Closed-loop pole; Closed-loop transfer function; Complex plane; Controllability; G. Gain scheduling; I. ... System identification This page was ...

  9. Industrial control system - Wikipedia

    en.wikipedia.org/wiki/Industrial_control_system

    A feedback control loop is directly controlled by the RTU or PLC, but the SCADA software monitors the overall performance of the loop. For example, a PLC may control the flow of cooling water through part of an industrial process to a set point level, but the SCADA system software will allow operators to change the set points for the flow.