doi: 10.17586/2226-1494-2015-15-4-685-694


HARDWARE ENVIRONMENT FACTOR FOR CONTROL SIGNAL TRANSFER TO A PLANT IN THE SYNTHESIS PROBLEM OF DISCRETE SYSTEMS

O. S. Nuyya, R. O. Peshcherov, A. V. Ushakov


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Article in русский

For citation: Nuyya O.S., Peshcherov R.O., Ushakov A.V. Hardware environment factor for control signal transfer to a plant in the synthesis problem of discrete systems. Scientific and Technical Journal of Information Technologies, Mechanics and Optics, 2015, vol.15, no. 4, pp. 685–694.

Abstract
The paper attempts to revise certain provisions of the existing theory of discrete systems in the organization of hardware environment control signal transmission to a technical plant. It is known that the formation of a digital signal in discrete control problem of continuous plant is carried out by microcontroller or micro-computer and is represented by a parallel code, which dimension is determined by the hardware used. The parallel code for a digital clock cycle of the designed system is transmitted to the terminal device of a technical continuous plant, where the digital-to-analog conversion takes place. This kind of control signal transmission to the technical plant asserts its implementation by means of parallel buses. It is known that the length of a parallel bus is limited to an amount not exceeding half a meter due to the existing interference environment with modern standards of length. Thus, if the placement of the control signal and control plant is such that their connecting bus length exceeds more than half a meter, there is the inevitable transition from the parallel control signal to an allotted serial. The paper deals with the system factors arising in the transition from the parallel control signal to the serial by modern interfaces. Provisions of the paper are illustrated by an example. This paper is intended for system analytics and channel specialists. The resulting algorithm is applicable for control of plants (electric drive, in particular) in the large industrial factories.

Keywords: digital control signal, hardware environment, serial interface, aggregated discrete model of the plant.

Acknowledgements. The work has been partially financially supported by the Government of the Russian Federation (Grant 074-U01) and the Ministry of Education and Science (Project 14. Z50.31.0031).

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