Control of Delays during Simulation of Control Systems by Petri Nets
The time is one of most important variables defining conditions of functioning of a control system. Processes appearing in a control system are characterized by duration, simulated as a delay, associated with transitions of a Petri net. The carried out analysis showed that control of system with asynchronous processes according to priorities often causes need to break started delays (processes) and start other. Desiring to have effective control, it is necessary to use algorithms continuously checking situation in the system and making desision what to do: let to run started operation or break it and start new one. Methods of control of delays of simulated by Petri nets processes are the aim of this paper. Any delay cant be breaked only without destroing of causal links to awoid failure of a control algorithm. Ill. 7, bibl. 8 (in Lithuanian, summaries in Lithuanian, English, Russian)
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