Control system for flow control valves

Details Control system for flow control valves Control system for flow control valves

1984-07-26

1986-05-20

Smith, Jerry

Boots, shoes, and leggings

364138, 239 67, 13762411, G06F 1500

Patent

active

045905762

ABSTRACT:
A method and apparatus for controlling the flow variables of a control system by sensing selected pneumatic parameters while operating the control system within maximum power consumption constraints. The control system includes a processor for selecting a first flow valve for movement during one duty cycle in one selected direction. The processor then selects for operation additional numbers of flow valves less than the maximum number of valves, drives the valves in the same direction as the first valve for the remainder of the duty cycle. The number of additional flow valves operated in any given duty cycle is determined by maximum power constraints. Calibration of each of the flow valves is accomplished driving each valve to an end point using less than the normal number of power phases to reduce the torque applied to the valve mechanism.

REFERENCES:
patent: 4200911 (1980-04-01), Matsumoto
patent: 4217647 (1980-08-01), Sjoholm
patent: 4502842 (1985-04-01), Currier

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