Identification of multiinput-multioutput transfer function and noise model of a blast furnace from closed-loop data

A procedure is described for the identification of multiinput-multioutput transfer function and the disturbance model from closed-loop data. The basic step of the identification procedure is to obtain a multivariate time series model for the input and the output series. A new method-viz., the method of successive orthogonalization is given for the modeling of multiple time series. Real data on closed-loop operation of a blast furnace are analyzed.