SYSTEM MODELLING APPARATUS AND METHOD, AND COTROLLER DESIGNING APPARATUS AND METHOD BY SYSTEM MODELLING

摘要

A system modeling apparatus and method and a controller designing system and method of performing a system modeling using the same includes applying a step input of a magnitude to a system of interest, sampling a number of outputs according to a predetermined sampling cycle in response to the step input to the system, applying a least square to the sampled output and the sampling cycle to calculate a presumptive maximum output value and a presumptive time constant of the system, repeating the applying, sampling, and calculating operations by at least two times, by varying the magnitude of the step input, to calculate two or more presumptive maximum output values and presumptive time constants, and calculating a DC gain and a time constant of the system using the calculated presumptive maximum output values and the presumptive time constants.