Adaptive flow controller for use with a flow control system
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United States of America Patent
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Feb 23, 1999
Issued Date -
N/A
app pub date -
Jul 3, 1997
filing date -
May 24, 1995
priority date (Note) -
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Abstract
An adaptive airflow control system for positioning damper systems or controlling air units utilized in an environment control system is provided. The system is based on a fixed-gain, proportional-only feedback design to provide stable operation given the nonlinear behavior of flow through a valve or damper. A time-dependent deadzone of nonlinearity is used to reject measurement noise. The deadzone of nonlinearity is adjusted by an adaptively calculated proportionality constant which is capable of switching the control system between various operating modes for adjusting the performance of the system.
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