Simulation of industrial management facilities with deterministic nonstationary

Abstract

The authors have considered the task of studying the dynamics of the actual time-dependent industrial facilities by means and methods of mathematical modeling. When using standard modeling tools of Simulink library it is not possible to change the parameters of the simulated level while solving the problem. To overcome this limitation the authors proposed the method of modeling industrial objects with dynamically changing parameters in the models containing an autonomous module, which implements an arbitrary functional dependence of the parameters of the simulated standard units on machine time scale. The model is based on implementation of integrating link with a parameter that varies in time according to a certain law, or based on an external signal of any shape. The paper demonstrates the transition to the modeling of inertial element of the first, the second and higher orders and introduces the example of a two-stage relay stabilization of water temperature in a tank at various external perturbations in a flow reactor with ideal mixing. The results of computer simulation are discussed and the constraints to the model application areas are determined.

Keywords

• deterministic unsteadiness
• mathematical simulations
• two-position control
• Simulink