Design and analysis of test signals for system identification

Abstract

For multi-channel process, due 10 disadvantages of the open-loop single variable slep method, multi-channel icsl method is used. That means all of the channels are tested at the same time. In order to eliminate cross-effect of the different lest signals, it requires that all the test signals are uncorrelated. Several test signals are introduced and analyzed. Based on two familiar identification methods: correlation analysis method and least-squares method, we put our strength on the way to gel uncorrelated test signals. A novel design for the period length of uncorrelaled pseudo random binary sequence (PRBS) is proposed. Use this design method, identifiable PRBS signals can he gained and their periods are the shortest. Simulation results show the effectiveness. © Springer-Verlag Berlin Heidelberg 2006.