Deadband control assistant eliminating offset from setpoint

Details Deadband control assistant eliminating offset from setpoint Deadband control assistant eliminating offset from setpoint

1997-01-27

2000-03-21

Grant, William

Data processing: generic control systems or specific application

Generic control system, apparatus or process

Optimization or adaptive control

700 42, 700 48, 700 49, G05B 1302

Patent

active

06041264&

ABSTRACT:
A deadband control assistant, operating as part of a control system, eliminates oscillation of a controlled process output around a desired setpoint. The deadband control defines a deadband range, and steady-state-stabilization-time for the process being controlled. When the process output is within the deadband range and oscillation around the setpoint occurs for the steady-state-stabilization-time, the error is set to zero. The control signal may simultaneously be set, or may settle to a fixed value. The deadband control assistant thus allows the process output to stabilize as close as possible to the desired setpoint. Normal process control may resume once the process output strays outside the deadband range.

REFERENCES:
patent: 3794817 (1974-02-01), Shinskey
patent: 4509110 (1985-04-01), Levesque, Jr. et al.
patent: 4604681 (1986-08-01), Sakashita
patent: 4885676 (1989-12-01), Zweighaft
patent: 5405291 (1995-04-01), Alcorn et al.

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