Analysis and calculation methodology for electrohydrostatic drives of the ground-based transport and technological complexes

The article is devoted to the analysis of the main parameters (pressure, power, torque, and speed) of the electrohydrostatic drive of ground-based transport and technological complexes, which include roadbuilding equipment.
The authors develop a design algorithm and obtain dependencies characterized in the operation process of the specified drive type on the basis of a compiled method for calculating the basic parameters of hydraulic components that are part of an electrohydrostatic drive. These criteria include the drive’s ability to precisely process input signals; speed of rod travel at a specified load; total operating coefficient; unit power.
The purpose of this calculation method is to develop an efficient electrohydrostatic drive for road construction machines that combines the advantages of hydraulics (high power, tremendous force with small components and easy reversing) with the flexibility of electronics, which allows positioning of the working parts of these machines (bucket, arm, excavator boom, manipulator, grader or bulldozer blade and the rotation of road roller rollers) with an accuracy of millimeter in fractions for a second.
The combination of analytical and numerical methods allows designing a prototype (the digital model) of this drive with its main characteristics, and then simulate the entire system, studying the flows inside the pump and channels, as well as conducting thermal analysis to assess the heating of the liquid and the motor. An electrohydrostatic drive is a complex system that requires consideration of many factors. The article focuses on the optimal selection of hydraulic components (pumps, hydraulic motor), which are selected depending on the parameters of the electric motor of the drive.
The research is aimed at establishing a basis for further experimental methods, which are conducted to validate theoretical (analytical) data and develop methods for diagnosing and monitoring electrohydrostatic drive. Experimental methods are used to determine the rigidity of the drive, the removal of amplitudefrequency characteristics and the measurement of currents and pressures in various operating modes.

1. Kopachev P. Yu., Kuz’menkov S. M., Alekseyev I. S. Autonomous electrohydrostatic drives. Tezisy Dokladov 55-y Mezhdunarodnoy Nauchno-Tekhnicheskoy Konferentsii Prepodavateley i Studentov. Vitebsk, 2022. P. 237–238. EDN: KDRWQP. (In Russ.).

2. Doni V. Autonomous monoblock electrohydrostatic actuators as executive modules of fully electricized robotic complexes. Novyye Nauchnyye Issledovaniya. Penza, 2022. P. 44–47. EDN: CMFYNX. (In Russ.).

3. Polkovnikov V. A., Selivanov A. M. Determination of energetic characteristics of servo actuators of electric hydrostatic servo drives of aircraft. Journal of Computer and Systems Sciences International. 2003;6:161–167. EDN: ONOAFN. (In Russ.).

4. Selivanov A. M., Alekseyenkov A. S., Naydenov A. V. Prospects of autonomous electrohydraulic drive. News of the Tula State University. Technical Sciences. 2011;5-1:359–364. EDN: PWNZWR. (In Russ.).

5. Desta A. B., Kovalev M. A. Development of a model of descriptive languages for recognizing the state of the working fluid of aircraft hydraulic systems. Components of Scientific and Technological Progress. 2022;7(73):11–16. EDN: HFFBLH.

6. Smirnov S. A., Gorshkova N. A. The method of designing hydraulic drives on the example of a hydraulic drive of a liftingmast device. System Analysis and Applied Information Science. 2017;4:21–26. EDN: YUZQYJ. (In Russ.).

7. Tikhonov N. F., Nadezhdina O. A. Application of an electrohydrostatic drive in mechatronic systems of agricultural machinery. High Technologies and Innovations in Science. Saint Petersburg, 2020. P. 90–93. EDN: IDXUBJ. (In Russ.).

8. Maslov N. A. Simulation modeling of tracking control systems for hydraulic actuators of tracked, mining, construction, and road machines. Fundamental and Applied Issues in Transportation. 2021;2(3):38–43. https://doi.org/10.52170/2712-9195/2021_3_38. EDN: EBXCSQ. (In Russ.).

9. Gusentsova Ya. A., Vysotskaya N. D. The method of characteristics for investigation of dynamics of hydraulic drive. Vestnik Lugansk Vladimir Dahl State University. 2022; 5(59):66–68. EDN: ILXAWQ.

10. Chistokletov A. A., Pugin K. G. Assessment of the technical condition of the hydraulic drive elements of road construction machines using modern approaches. Chemistry. Ecology. Urbanistics. 2023;2:336–340. EDN: FVIXGX. (In Russ.).

11. Burlachenko O. V., Aleksikov S. V., Fomenko N. A. Reliability improvement of the protection system of hydraulic gear of construction and road cars. Bulletin of the Volgograd State University of Architecture and Civil Engineering. Series “Construction and Architecture”. 2016;45(64):76–85. EDN: WWBOXR. (InRuss.).

12. Grinchar N. G., Shilyaev N. A. The influence of low temperatures on the performance characteristics of a hydraulic drive. Energy-Resource-Saving Technologies and Equipment in the Road and Construction Industries. Belgorod, 2021. P. 50–55. EDN: FPZFAH. (In Russ.).

13. Galdin N. S., Semenova I. A., Galdin V. N. Razrabotka i issledovaniye matematicheskikh modeley gidravlicheskikh rabochikh organov ekskavatorov [Development and research of mathematical models of hydraulic excavator working elements]. Omsk, 2025. 170 p. ISBN 978-5-00113-261-5. EDN: IQYEZL. (In Russ.).

14. Galdin N. S., Semenova I. A. Special mounted hydraulic equipment for excavators. Education. Transport. Innovations. Construction. Omsk, 2022. P. 49–53. EDN: CXLBIZ. (In Russ.).

15. Mashrapova M. A, Tileuberdi N., Abdeli D. Zh. [et al.]. Hydraulic fracturing using highboiling fraction of oil as a fracturing fluid. Kazakhstan Journal for Oil & Gas Indu*-stry. 2023;5(2):69–80. https://doi.org/10.54859/kjogi108652. EDN: VRYTBE. (In Kazakh).