proportional control


Also found in: Wikipedia.

proportional control

[prə′pȯr·shən·əl kən′trȯl]
(control systems)
Control in which the amount of corrective action is proportional to the amount of error; used, for example, in chemical engineering to control pressure, flow rate, or temperature in a process system.
References in periodicals archive ?
LiuGong added that the F series excavators are equipped with the latest electronically controlled hydraulic system consisting of a main pump with large displacement, a low-speed and high-torque engine and a main electro-hydraulic proportional control valve for better management of flow distribution.
electro-hydraulic system with proportional control (technical characteristics and description see in the technical specifications (attached): - 8-section electro-proportional hydrodistributor with ls control and spool position monitoring system (d) - 30 pcs .
The joystick also accommodates controls for two- and three- hydraulic systems, including proportional control of auxiliary circuits.
To keep the Servopac big board model producing quality, dense units at an accelerated clip, Besser engineers incorporated a) laser sensors to gauge material volume or levels in the clamshell gate-equipped hopper; b) a hydraulically driven feedbox with proportional control; and, c) a powered agitator to improve material feed to the mold.
Vetus has recently launched the BOWPRO bow thruster using the latest inverter technology with unlimited run time and having proportional control. The BOWPRO won the Innovation Award at last year's Miami boat show.
This is because fewer circuits are possible with ambient proportional control. Such controls are only appropriate if the heating cables are inherently temperature-safe, which many are not.
The proportional control ventilation system in terms of C[O.sub.2] simulation has been conducted in Energyplus v8.8 (Crawley et al.
Generators: Vetaphone's intelligent generators offer power output from 1 - 200kW, with proportional control related to line speed.
Secondly, the electromagnetic proportional control valve is a multiphysics field coupled system, including electromagnetic field and flow field [20].
To introduce a proportional control an approach similar to that described in [8] was employed.
Company presses available for testing include two MicroLIM machines with a Graco #622 meter mix; a 30-ton Genesis compression press with proportional control of pressure and temperature; a Carver 30-ton Auto Series press; A Carver 12-ton Model C, heated and cooled; and a five-ton Sterling chiller.
For evaluation, the proposed strategy--that is, the CMS--was compared to a proportional control strategy whose SOC set-point is constant.