This article relies largely or entirely on a single source. Relevant discussion may be found on the talk page. Please help improve this article by introducing citations to additional sources. Find sources: "Proportional control" – news · newspapers · books · scholar · JSTOR(March 2021)
Proportional control, in engineering and process control, is a type of linear feedback control system in which a correction is applied to the controlled variable, and the size of the correction is proportional to the difference between the desired value (setpoint, SP) and the measured value (process variable, PV). Two classic mechanical examples are the toilet bowl float proportioning valve and the fly-ball governor.
The proportional control concept is more complex than an on–off control system such as a bi-metallic domestic thermostat, but simpler than a proportional–integral–derivative (PID) control system used in something like an automobile cruise control. On–off control will work where the overall system has a relatively long response time, but can result in instability if the system being controlled has a rapid response time. Proportional control overcomes this by modulating the output to the controlling device, such as a control valve at a level which avoids instability, but applies correction as fast as practicable by applying the optimum quantity of proportional gain.
A drawback of proportional control is that it cannot eliminate the residual SP − PV error in processes with compensation e.g. temperature control, as it requires an error to generate a proportional output. To overcome this the PI controller was devised, which uses a proportional term (P) to remove the gross error, and an integral term (I) to eliminate the residual offset error by integrating the error over time to produce an "I" component for the controller output.
and 23 Related for: Proportional control information
Proportionalcontrol, in engineering and process control, is a type of linear feedback control system in which a correction is applied to the controlled...
Proportional myoelectric control can be used to (among other purposes) activate robotic lower limb exoskeletons. A proportional myoelectric control system...
several types of linear control systems with different capabilities. Proportionalcontrol is a type of linear feedback control system in which a correction...
scheduling algorithm Proportionalcontrol, a type of linear feedback control system Proportionality (law), a legal principle Proportionality (Internationa Humanitarian...
Proportional navigation (also known as PN or Pro-Nav) is a guidance law (analogous to proportionalcontrol) used in some form or another by most homing...
His goal was stability, not general control, which simplified the problem significantly. While proportionalcontrol provided stability against small disturbances...
network. Vegas implements proportional fairness. FAST TCP – achieves the same equilibrium as Vegas, but uses proportionalcontrol instead of linear increase...
Proportional representation (PR) refers to any type of electoral system under which subgroups of an electorate are reflected proportionately in the elected...
proportionalcontrol, to complex nonlinear estimators or many in-between types, depending on mission requirements. Typically, the attitude control algorithms...
thermostat controlling a domestic boiler to large industrial control systems which are used for controlling processes or machines. The control systems are...
Control engineering or control systems engineering is an engineering discipline that deals with control systems, applying control theory to design equipment...
increase power output, and vice versa. This type of control is referred to as "straight proportional" control. If the entire grid tends to be overloaded, the...
control systems such as servoamplifiers to prevent oscillation or repeated activation-deactivation cycles (called 'hunting' in proportionalcontrol systems)...
Azon guided ordnance, however, was a fully proportionalcontrol, with the "ailerons", solely under the control of an on-board gyroscope, serving merely...
system Industrial control system, a general term used in industrial process controlProportionalcontrol, a type of linear feedback control system Elite controllers...
off the water flow. This is an example of negative feedback and of proportionalcontrol. When the handle of a flush toilet with a tank (British, cistern)...
303: 351-364, 1980. Kanda, K., Burke, R. E., & Walmsley, B. Differential control of fast and slow twitch motor units in the decerebrate cat. Exp. Brain...
operating a pair of ailerons, and a radio control system to operate the proportional-control rudders, to directly control the bomb's direction of lateral aim...
brakes. The amount of each brake applied may be determined by a proportionalcontrol valve. This is distinct from (conventional) integrated brakes, where...
so as to maintain a near-constant speed. It uses the principle of proportionalcontrol. Centrifugal governors, also known as "centrifugal regulators" and...
driven using solar energy or waste heat and they can be controlled using proportionalcontrol. They can use heat available at low temperatures which makes...
are complementary. Proportional navigation (also known as "PN" or "Pro-Nav") is a guidance principle (analogous to proportionalcontrol) used in some form...
of vasoconstriction, slow steady and continuous rewarming and a proportionalcontrol form in which the blood vessel diameter remains constant after an...