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Design, simulation, and experimental study of hydrostatic drive system for wide-span farming platform
Jiaxiang Ma1,2, Hongfeng Yan1,2,3, Rongxuan Li1,2
1Chinese Academy of Agricultural Mechanization Sciences, Beijing, China.
Plos One
|October 22, 2025
Summary
A new hydrostatic drive system for wide-span farming platforms ensures stable steering in both longitudinal and transverse modes. This robotic gantry tractor design enhances field efficiency and reduces soil compaction.
Area of Science:
- Agricultural Engineering
- Robotics
- Hydraulic Systems
Background:
- Wide-span farming platforms, or gantry tractors, offer benefits like reduced soil compaction and improved efficiency.
- Existing platforms require advanced steering for transverse and longitudinal movement, demanding enhanced flexibility and stability.
Purpose of the Study:
- To design and validate a hydrostatic drive system for a wide-span farming platform.
- To achieve versatile steering modes and improve platform movement stability.
Main Methods:
- Designed an X-type dual-pump and four-motor hydrostatic drive system with flow diverters.
- Performed mechanical analysis and component selection for the hydraulic system.
- Modeled and simulated the system using AMESim software.
- Conducted road and farmland tests in longitudinal and transverse modes.
Main Results:
- The hydrostatic drive system demonstrated stable and synchronized performance across different modes.
- Longitudinal mode on cement roads showed an average deviation rate of 5.0%.
- Transverse mode on dry and wet soil exhibited deviations of 6% and 2.1% at maximum speed, respectively.
Conclusions:
- The designed hydrostatic drive system ensures good driving stability for wide-span farming platforms.
- The results validate the system's design and provide a reference for future optimizations.
- This technology enhances the operational capabilities of robotic agricultural platforms.
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