Systems consisting of several cascade-connected transporters for rubber strip transportation are presented in this paper. In consideration of the systems structure and the fact that the technological parameters of rubber materials are time variant, one of the characteristics of these systems is the possibility of oscillations and chaos appearance. In this paper the conditions for appearance of oscillations and chaos in mentioned systems are analysed. The results are confirmed by simulation of bifurcation and escape-time diagrams.
The system for protector cooling (protective rubber strip) in the tyre industry is presented in this paper. The analysis of compensation of protector compression coefficients influence on the protector length change between two neighbor transporters is done. Also, the compensation of protector compression coefficients influence on all transporters velocities is analyzed. Modelling and simulation of transportation system is performed in Matlab/Simulink.
ARTICLE HISTORY
A new method for determining the time without failures using Petri nets will be presented in this paper. Petri nets are very appropriate for modelling and analysis of different systems. Due to its simplicity, this method can be applicable in practice, for example, for reliability analysis and for the time without failures calculation. The results are illustrated using the example of electric power system.
Key words: Petri nets,time without failures, fault tree
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