Automatic control loop monitoring and diagnostics
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United States of America Patent
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Nov 17, 1998
Grant Date -
N/A
app pub date -
Sep 23, 1996
filing date -
Apr 29, 1996
priority date (Note) -
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status (Latency Note)
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Abstract
A method of diagnosing a malfunction of a process control system which includes at least one closed loop control loop comprising measuring a histogram of tracking error of the control loop, determining distortion of the tracking error relative to a Gaussian distribution, and indicating a malfunction in the process in the event a deviation from the Gaussian distribution of the tracking error exceeds predetermined limits.
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