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US 7,096,093 B1Granted
Intelligent valve flow linearization
AssigneeInvensys Systems, Inc.
InventorsPeter Daniel Hansen, Bulent Goksel
Life of this patent
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Abstract
A feed-forward flow controller is designed to calculate a target valve position from a target flow. Correction is made for liquid or gas pressure drop across the valve and for the valve flow modulating member geometry. This feed-forward action may also be used to linearize a feed-back flow control loop.
Claims15
An open loop method of controlling flow rate of a fluid through a valve flow modulating member that is controlled by a position of a valve stem, the method comprising:
- setting a target flow rate;
- determining a target valve stem position based on the target flow rate;
- and
- adjusting the valve stem position until a position of the valve stem matches the target valve stem position.
1 more element
Dependencies are inferred from the claim text.