Multivariable control of a Kamyr digester

Details Multivariable control of a Kamyr digester Multivariable control of a Kamyr digester

1991-10-07

1994-04-05

Smith, Jerry

Boots, shoes, and leggings

364165, 364153, G06F 1546

Patent

active

053011023

ABSTRACT:
The feedback calculation for a dynamic matrix control (DMC) system has been modified so that it can accommodate a delay period between the time when the output variable is measured and when the measurement is available for feedback. This was accomplished by storing the projection vectors calculated by the DMC system and then comparing them to the output variable measurements as they become available. The algorithm was modified to handle planned production rate changes by adding another term to the equation used to calculate the projection vectors. This term involves multiplying the dynamic matrix for a given disturbance variable by a vector of future changes in that disturbance variable.

REFERENCES:
patent: 4348256 (1982-09-01), Bergstrom et al.
patent: 4349869 (1982-09-01), Prett
patent: 4358822 (1982-11-01), Sanchez
patent: 4577270 (1986-03-01), Sugano et al.
patent: 4616308 (1986-10-01), Morshedi et al.
patent: 5032976 (1991-07-01), Beller et al.

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