Orlowski, Przemyslaw2023-05-302023-05-302007-10Orłowski P. (2007). Comparison of frequency domain methods for discrete-time, linear time-varying system with invariant eigenvalues. International Journal of Factory Automation, Robotics and Soft Computing, iss. 4, pp. 27-32. https://hdl.handle.net/20.500.12539/17661828-6984https://hdl.handle.net/20.500.12539/1766The main aim of this paper is to compare and evaluate frequency methods applicable for discrete-time (DT) linear time-varying (LTV) systems, in particular: two-dimensional (time, frequency) transfer function (2D-TF), timeaveraged 2D-TF and approximated Bode diagrams calculated using SVD-DFT approach and power spectral density (PSD) properties. The main evaluation criteria is possible applicability to feedback system stability analysis. The paper begins from short theoretical background of frequency methods applicable for LTV systems. Further properties of these methods are compared and discussed on the basis of particular case of parameter controlled switching DT LTV system.enUznanie autorstwa-Użycie niekomercyjne-Bez utworów zależnych 3.0 Polskadiscrete-time systemstime-varying systemsnon-stationary systemsstability analysisfinite time horizonfrequency analysisDyscyplina::Nauki inżynieryjno-techniczneArticle