05. Vakhidov U.Sh., Kurkin A.A., Levshunov L.S., et al. Ensuring the Stability of Agricultural Transport and Technological Machines Equipped with Ultra-Low Pressure Tires during Braking

UDK 631.5:62-59

DOI: 10.15507/2658-4123.030.202004.609-623

Ensuring the Stability of Agricultural Transport and Technological Machines Equipped with Ultra-Low Pressure Tires during Braking

Umar Sh. Vakhidov
Head of the Chair of Construction and Road Machinery, Nizhny Novgorod State Technical University (24 Minin St., Nizhny Novgorod 603950, Russian Federation), D.Sc. (Engineering), Professor, Researcher ID: AAG-8584-2020, ORCID: https://orcid.org/0000-0003-4109-8406, Scopus ID: 55794612500, This email address is being protected from spambots. You need JavaScript enabled to view it.

Andrey A. Kurkin
Vice-Rector for Science and Research, Nizhny Novgorod State Technical University (24 Minin St., Nizhny Novgorod 603950, Russian Federation), D.Sc. (Phys.-Math.), Professor, Researcher ID: A-1972-2014, ORCID: https://orcid.org/0000-0003-3828-6406, Scopus ID: 7003446660, This email address is being protected from spambots. You need JavaScript enabled to view it.

Lev S. Levshunov
Associate Professor of Chair of Construction and Road Machinery, Nizhny Novgorod State Technical University (24 Minin St., Nizhny Novgorod 603950, Russian Federation), Cand.Sc. (Engineering), Scopus ID: 57208467666, This email address is being protected from spambots. You need JavaScript enabled to view it.

Iuri I. Molev
Professor of Chair of Construction and Road Machinery, Nizhny Novgorod State Technical University (24 Minin St., Nizhny Novgorod 603950, Russian Federation), D.Sc. (Engineering), Associate Professor, Researcher ID: AAG-8501-2020, ORCID: https://orcid.org/0000-0002-0429-4590, Scopus ID: 57203352368, This email address is being protected from spambots. You need JavaScript enabled to view it.

Dmitriy N. Proshin
Senior Lecturer of Chair of Construction and Road Machinery, Nizhny Novgorod State Technical University (24 Minin St., Nizhny Novgorod 603950, Russian Federation), ORCID: https://orcid.org/0000-0002-8620-157X, Scopus ID: 57214464141, This email address is being protected from spambots. You need JavaScript enabled to view it.

Aleksandr V. Sogin
Professor of Chair of Construction and Road Machinery, Nizhny Novgorod State Technical University (24 Minin St., Nizhny Novgorod 603950, Russian Federation), D.Sc. (Engineering), Associate Professor, ORCID: https://orcid.org/0000-0003-4384-1136, Scopus ID: 57203352293, This email address is being protected from spambots. You need JavaScript enabled to view it.

Introduction. Improving the efficiency of agricultural operations and off-road logistics require new highly efficient non-road machinery with low pressure on road surface. The versatility of the use of this machinery imposes additional requirements on its design, including those related to road traffic safety on public roads. Changes in brake design are required to ensure safe braking performance when larger diameter wheels are used for the reason that to produce standard braking force according to the technical regulations for the safety of wheeled vehicles, requires more braking torque when using larger diameter wheels.
Materials and Methods. The article proposes a model for calculating the braking parameters of transport and technological agricultural machines equipped with ultra-low pressure wheels. The model differs from those used earlier in that its output parameter is not the braking efficiency, but the time difference between the front and rear axle locks.
Results. Fulfilling the condition of the front axle advance locking ensures the stability of the tractor motion during emergency braking that has a positive effect on road traffic safety. The results of the study suggest that to ensure the safe motion of the machines equipped with ultra-low pressure tires on public roads, it is necessary that the ratio of the distance from the center of mass to the front axle is at least not less than the distance from the center of mass to the road surface.
Discussion and Conclusion. The proposed mathematical model has shown its adequacy. The obtained mathematical dependencies allow us to justify different technical solutions for ensuring safe road movement of transport and technological agricultural machines equipped with ultra-low pressure tires. Thus, the maximum permissible height of the center of mass can be assumed to be equal to 90% of the distance from the location of the center of mass of an agricultural transport and technological machine to its front (controlled) axis.

Keywords: traffic safety, braking, stability, center of mass, skid, agricultural transport and technological machines, ultra-low pressure wheels

Funding: The research was carried out with the financial support of the Ministry of Science and Higher Education of the Russian Federation: Project “Creation of high-tech production of GAZelle Next vehicles with new electronic architecture of electronic systemsˮ under Agreement No. 075-11-2019-027 of 29 November 2019 (Resolution of the Government of the Russian Federation No. 218 of 9 April 2010).

Acknowlegments: Experimental studies were carried out using the equipment of the Transport Systems Center for Collective Use of the Nizhny Novgorod State Technical University.

For citation: Vakhidov U.Sh., Kurkin A.A., Levshunov L.S., et al. Ensuring the Stability of Agricultural Transport and Technological Machines Equipped with Ultra-Low Pressure Tires during Braking. Inzhenerernyye tekhnologii i sistemy = Engineering Technologies and Systems. 2020; 30(4):609-623. DOI: https://doi.org/10.15507/2658-4123.030.202004.609-623

Contribution of the authors: U. Sh. Vakhidov – analysis of mathematical models, theoretical calculations, drawing the conclusions; A. A. Kurkin – scientific guidance, analysis of research results, improvement of text, correction of conclusions; L. S. Levshunov – correction of literary analysis, improvement of text, correction of conclusions; Iu. I. Molev – formation of the main concept, goals and objectives of the research, making calculations, preparation of the text, formation of conclusions; D. N. Proshin – conducting the experimental part of the research, text correction, correction of conclusions; A. V. Sogin – analysis of scientific sources, improvement of the text, discussion of results.

All authors have read and approved the final manuscript.

Received 11.05.2020; revised 10.07.2020; published online 30.12.2020

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