CALCULATION OF TRANSIENT PROCESSES IN PHASE-CONTROLLED DISCRETE SYSTEMS USING THE MATLAB 6.0 SOFTWAREM. P. Batura and D. A. Gan'shin UDC 681.11 The issues of investigation and analysis of phase-controlled discrete systems are considered. Two methods of modeling (piecewise analytical and simulation) are proposed. The characteristic properties of the implementation of the simulation method are analyzed from the viewpoint of the use of the MATLAB 6.0 software package for automation of engineering calculations. Belarusian State University of Informatics and Radioelectronics, Minsk, Belarus; email: Hanshyn@hotmail.com. Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 76, No. 2, pp. 193-195, March-April, 2003. Original article submitted December 19, 2002.