Control loop theory

target value that an automatic control system, for example PID controller, will aim to reach

linear optimal control technique

in control theory, the combination of process and actuator

in control engineering, the variable chosen by the controller to manipulate state variables, similar to an actual control valve

fundamental building block of industrial control systems, consisting of all the physical components and control functions necessary to automatically adjust the value of a measured process variable with respect to that of a desired set-point