Closed-loop control device
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United States of America Patent
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Oct 6, 2015
Grant Date -
Apr 11, 2013
app pub date -
Oct 5, 2012
filing date -
Oct 6, 2011
priority date (Note) -
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status (Latency Note)
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Abstract
A closed-loop control device for a process, in which a dead band element is connected upstream of a linear dynamic controller to reduce actuating interventions in the steady control state. If a control deviation (e) of the control loop exceeds a first threshold value (s1), then the dead band element is automatically deactivated, where a control deviation (e1) passed via the dead band element is uninfluenced by a set dead band in the inactive state. If the control deviation (e) then undershoots a second threshold value that is less than the first threshold value, then the dead band element is automatically re-activated. This reduces the energy consumption and wear of an actuator and improves the control behavior with regard to steady-state accuracy and the control behavior of the control loop.
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