Method, system and storage medium for performing online valve diagnostics
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United States of America Patent
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Aug 8, 2006
Grant Date -
Nov 18, 2004
app pub date -
Feb 12, 2004
filing date -
Feb 14, 2003
priority date (Note) -
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Abstract
Methods and systems for performing online valve diagnostics. Valve characteristics such as step response, friction and spring range are determined while the valve is operating in a process without intervention by a controller deriving the valve diagnostics. Valve information is obtained while the valve operates in response to a control signal controlling a process while the valve operates through a series of gradual movements. Valve characteristics are then determined from the valve information.
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