JOURNAL OF THEORETICAL AND APPLIED MECHANICS

Along with increasing dimensions, speed, and output of modern machi-nes, many newly appearing problems are being encountered in design and manufacturing of such machines. Vibrations occuring in certain technolo-gical processes create undesirable phenomena which limit the durability, cause excessive dynamic reactions with surroundings or increase level of emitted sound. For a certain class of machines, however, vibration con-stitutes the primary factor ensuring that a desired technological process is performed correctly. This class is hereafter referred to as vibratory machines. Based on the considerations made in this paper, a conclusion can be drawn that from the point of view of mechatronical design of vi-bratory machines it is necessary to determine precise models of machines including the driving system, especially the induction motor. Key words: vibratory machines, machine dynamics, modelling 1