Untypical methods for experimental determining of Strejc’s model parameters

Do opisu zachowania się wielu typów obiektów dynamicznych przydatny jest model Strejca, posiadający tylko trzy parametry: współczynnik statycznego wzmocnienia k, stałą, czasową T, oraz rząd dynamiki n. Ponieważ prawdziwa transmitancja obiektu nie jest znana, parametry te należy w praktyce wyznaczyć wykonując odpowiednie eksperymenty identyfikacyjne. Omówiono niektóre nietypowe przykłady takich metod.The so-called Strejc’s model of relatively simple form, having only three parameters: static amplification factor k, time constant T and order of dynamics n, is useful for simplified description of behaviour of many types of dynamic objects. Such a model makes the identification process easier and is sufficient for many practical applications. The Strejc’s model parameters should be determined based on appropriate measurement experiments, since the real transfer function of the object is unknown. There are several typical identification methods useful for the determined conditions (occurrence of disturbances, limited time of experiment duration, and so on), which does not mean there is no possibility of creating new methods, more advantageous in the given conditions (more economical, less sensitive to disturbances occurring in the measurement process, simpler in respect of calcula-tion algorithms used). In the paper there are presented proposals of a few methods which seem to be promising, relatively simple and economical. The results of simulation experiments are also given