Научная электронная библиотека ULRICH'S Periodicals Directory

Сибирский государственный университет
науки и технологий имени академика М.Ф. Решетнева

Сибирский аэрокосмический журнал
ISSN 2712-8970 (Print) ISSN 2782-5760 (on-line)

Сведения об образовательной организации

UDK 62.501
IDENTIFICATION OF HYDRAULIC RESISTANCE PARAMETERS IN HYDRAULIC NETWORK MODEL
N. R. Antropov1*, E. D. Agafonov2
1Siberian Federal University 79, Svobodny Av., Krasnoyarsk, 660041, Russian Federation 2Reshetnev Siberian State University of Science and Technology 31, Krasnoyarsky Rabochy Av., Krasnoyarsk, 660037, Russian Federation *E-mail: agafonov@gmx.de
The work is devoted to the identification of hydraulic resistance coefficients in hydraulic network model. The problem raised in the paper is relevant for enterprises dealing with either pipeline transport of fluid hydrocarbons, or water supply and central heating. The proposed algorithm can be implemented for corresponding technological modes calculation and prediction. Complexity of real pipeline networks, uncertainty and instability of their parameters make parameters identification procedure indispensable. The network model under research is a system of nonlinear equations, drawn up in accordance with Kirchhoff’s laws for pipeline networks. Equations describe laws of flows conservation for nodes as well as pump heads and head drops along independent circuits of the network. To solve such system one traditionally implements Newton’s method or its modifications, for instance the successive approximation method. Mentioned methods have numerous disadvantages like instability and sensibility to initial approximation of the roots. The system of equations solving is accompanied with their parameters tuning usually with the Nonlinear Least Square Method. Again, the method can be instable due to overdefined and large-scale problem statement. In the paper we propose to substitute solution of the system with nonparametric estimation of the solution. We implement regression type estimate with respect to residuals of the equations calculated for measured data sample. Simultaneously parameters of the equations are identified. Modification of Kiefer–Wolfowitz procedure is used as an identification algorithm. Identification is performed with simultaneous evaluation of the solution of the system of equations. The use of appropriate algorithms is considered at three-loop pipeline network with a single active pressure. Numerical experiments with proposed algorithm demonstrate its applicability for practical identification problems solution.
Keywords: identification, parameter estimation, flow resistance
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Antropov Nikita Romanovich – postgraduate student, Department of Fuel Supply, Fuels and Lubricants, Siberian

Federal University, School of Petroleum and Natural Gas Engineering. Е-mail: underlag_sikrer@mail.ru.

Agafonov Evgeny Dmitrievich – Cand. Sc., Docent, Docent of Department of System Analysis and Operation

Research, Reshetnev Siberian State University of Science and Technology. Е-mail: agafonov@gmx.de.