SOFT SENSOR DEVICE AND DEVICE FOR EVALUATING THE SAME

摘要

A case base generator divides an input space of history data into unit input spaces according to a desired output allowable error, creates a representative case from the history data arranged in the unit input spaces, and generates a case base (11). A case search section (12) of a soft sensor (1) retrieves a case corresponding to new input data from the case base (11). An output estimating section (13) calculates and outputs estimation output data Y corresponding to the new input data on the basis of the output data on the case retrieved. An output evaluating section (14) calculates and outputs an estimation error d of the estimation output data Y on the basis of the phase distance between the new input data and the retrieved case. A function evaluating section (16) evaluates the soft sensor (1) on the basis of the estimation error d, the estimation output data Y, and true output data Yout.