Plant diagnostic system

Details Plant diagnostic system Plant diagnostic system

1986-09-23

1988-07-05

Smith, Jerry

Boots, shoes, and leggings

364184, 364151, 364156, 364185, G05B 1304

Patent

active

047559250

ABSTRACT:
A plant diagnostic system is disclosed wherein a plant to be diagnosed is expressed as an auto regressive model. A correlation function with respect to a difference obtained on the basis of an estimated value based on the auto regressive model and a plant value of the plant to be diagnosed is calculated. There is additionally provided a time constant determination unit for determining a time constant at which a change of one plant value has the greatest influence on that plant value or other plant values by using a coefficient matrix of the auto regressive model. This enables calculation of the correlation function in consideration of the time constant of the plant to be diagnosed. In this manner, an identification of an abnormality or failure source which is in conformity with the characteristic of the plant to be diagnosed can be conducted.

REFERENCES:
patent: 4349869 (1982-09-01), Prett et al.
patent: 4410950 (1983-10-01), Toyoda et al.
patent: 4517468 (1985-05-01), Kemper et al.
patent: 4578747 (1986-03-01), Hideg et al.
patent: 4630189 (1986-12-01), Ohmori et al.

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