International Scientific Journals
of Scientific Technical Union of Mechanical Engineering "Industry 4.0"

Research, optimization and practical implementation of optimization processes in power subsystems of power plants, heating plants and industrial plants present a relatively complex task that is nowadays unimaginable without powerful specialized tools of computer support. The paper presents a power systems emulator concept (a tool for the design and application processes involving power systems) that is based on decentralized control systems (DCS) standardly used today. Basic principles of modular design of the emulator along with an example of its implementation based on the Siemens SIMATIC-S7 DCS system are presented.

The paper deals with the design and experimental verification of a new control structure with reference model for the tension control in the technological processing line the stability of which is derived on basis of the second Lyapunov method. The properties of the proposed controller were verified by experimental measurement on a new concept of hardware-in-the-loop (HIL) simulation platform based on programmable logic controllers (PLC). The experimental measurements confirmed that the proposed control structure is robust over a wide range of controlled system significant parameters changes together with invariance and desired dynamics prescribed by the reference model.