Identification of a Nonlinear Difference Equation Model of an Industrial Diesel Generator

摘要

The identification of a nonlinear difference equation model of a 6996 bhp 12 cylinder industrial diesel generator is described. The analysis of the data, recorded from experimental trials on the diesel generator, is initially pursued assuming that the relationship between the input (rack position) and the output (engine torque) are linearly related. As the analysis proceeds this assumption is shown to be in error and nonlinear terms are introduced into the model representation. The inclusion of nonlinear terms in the model is shown to provide a representative model of the diesel generator which fits the available data well and which is shown to produce accurate predictions of the system output response over a different data set.