EXPERIMENTAL DETERMINATION OF TRANSFER FUNCTIONS OF CONTROL OBJECTS

DOI: 10.47026/1810-1909-2022-1-73-87

УДК 621.31;004.94

ББК 32.859

NADEZHDA M. LAZAREVA

Key words

simulation modeling, transmission function, Simulink MATLAB, control Design, linear analysis, diagram of zeros and poles, transient response, step-down converter, acceleration curve

Abstract

The modern development of computer mathematics systems opens up opportunities for the researcher to obtain a solution to an engineering problem based on the results of simulation modeling. The use of Simulink interactive environment tools is promising for modeling and analyzing a wide class of dynamic systems, as it allows modeling very quickly and without writing a program code. Determining the transfer function of a power electronics device is an urgent task, since this type of converter model allows not only analyzing its operating modes and conducting research to calculate the power section, but also developing a closed-loop control system that provides the required dynamic characteristics.

The article discusses Simulink MATLAB simulation tools used to determine the parameters of electrical circuit models in the form of a transfer function. It is shown that the transfer function of the device can be synthesized from the model of its circuit diagram without the use of programming skills. Examples of using the Simulink toolkit for constructing the transfer functions of an RLC circuit by a given circuit diagram and determining its parameters are given. The article analyzes the shortcomings of simulation tools when modeling converter technology devices. A specific example of identifying the transfer function of the converter from the load voltage acceleration curve is considered. The reliability of the result is confirmed by a computational experiment.

References

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Information about the author

Nadezhda M. Lazareva – Candidate of Technical Sciences, Associate Professor, Department of Industrial Electronics, Chuvash State University, Russia, Cheboksary (lana21lana21@mail.ru; ORCID: https://orcid.org/0000-0003-2122-089X).

For citations

Lazareva N.M. EXPERIMENTAL DETERMINATION OF TRANSFER FUNCTIONS OF CONTROL OBJECTS. Vestnik Chuvashskogo universiteta, 2022, no. 1, pp. 73–87. DOI: 10.47026/1810-1909-2022-1-73-87 (in Russian).

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