G - Physics – 05 – B
Patent
G - Physics
05
B
354/23
G05B 23/02 (2006.01) F01K 7/16 (2006.01) F16K 37/00 (2006.01) G05D 7/06 (2006.01)
Patent
CA 1333298
A method for automatically calibrating a controller for a valve controlled system follows consistent procedures to make precise adjustments to valve characteristics. The controller is placed in a calibration mode, then the valve settings are modified over a full range of operation. At predetermined levels of operation, the valve settings are maintained at preset values while system performance is measured. After the full range of valve operation has been covered, adjustments are made to the correspondence between the valve settings and the levels of operation in dependence upon the differences between the measured system performance and the predetermined levels of operation. This procedure is repeated to provide average values and also to make changes to valve characteristic curves corresponding to different modes of operation such as single valve and sequential valve modes. Other control parameters may be adjusted by evaluating system performance during normal operation.
604339
Hwang Edward Yung-Chuan
Thomas Timothy Dean
Bereskin & Parr Llp/s.e.n.c.r.l.,s.r.l.
Westinghouse Electric Corporation
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