Identification of Combustion Engines With Special Orthogonal Excitation Signals

This article shows a new excitation method for the identification of combustion engines. The method is based on the combination of statistical stationary engine measurement (Design of Experiments - DoE) and dynamic identification techniques for nonlinear multi-input systems. The dynamics are excited by special amplitude-modulated pseudo-random-multilevel-signals (APRMS), which act on the engine simultaneously, in order to allow a short measurement time period. Because the used dynamic excitation signals are orthogonal, they allow a better separation of the input signals for system identification.