Automatic process control and noise suppression

Details Automatic process control and noise suppression Automatic process control and noise suppression

1993-07-23

1994-08-30

Larson, Lowell A.

Metal deforming

With use of control means energized in response to activator...

Metal deforming by use of roller or roller-like tool element

364151, 364469, B21B 3702, G05B 1304

Patent

active

053416635

ABSTRACT:
A method for automatically controlling a nominal property value of a material in the process of making the material, The method includes the steps of providing a feedback model of the process and eliminating the influence of time delay on determining the nominal property value, A state observer is used to estimate at least one unmeasurable variable of the process as a function of at least one measurable variable of the process. The above steps are combined to control the nominal property value as a function of a process variable that is both measurable and undelayed. An actual feedback measurement containing a time delay can be used to correct for any errors that might exist in the feedback estimate.

REFERENCES:
patent: 4691547 (1987-09-01), Teoh et al.
patent: 5043863 (1991-08-01), Bristol et al.
patent: 5057993 (1991-10-01), Kanda
patent: 5121332 (1992-06-01), Balakrishnan et al.

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