Modeling the Motion of a Mobile Power Vehicle with Ultra-Low Pressure Tires
The paper states that the conditions of curvilinear motion of agricultural mobile power vehicle signifiantly depend on the operating modes of highly elastic tires. Describing and modeling this process will improve the operational performance of mobile power vehicle at the research and design stages....
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| Main Authors: | , , |
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| Format: | Article |
| Language: | Russian |
| Published: |
Federal Scientific Agroengineering Centre VIM
2024-09-01
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| Series: | Сельскохозяйственные машины и технологии |
| Subjects: | |
| Online Access: | https://www.vimsmit.com/jour/article/view/600 |
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| Summary: | The paper states that the conditions of curvilinear motion of agricultural mobile power vehicle signifiantly depend on the operating modes of highly elastic tires. Describing and modeling this process will improve the operational performance of mobile power vehicle at the research and design stages. (Research purpose) The research aims to assess the impact of ultralow-pressure tire parameters on the directional stability of the mobile power vehicle during curvilinear motion. (Materials and methods) The paper analyzes the motion of a mobile power vehicle on the headland at various speeds and internal tire pressure, considering changes in the mass of the operational material in the tank. The characteristics of the lateral slip of ultra-low-pressure tires are presented dependent on the empirical determination of the tire slip angle under laboratory conditions. (Results and discussion) The research resulted in obtaining dependences that describe the change in the lateral displacement of the center of mass in the mobile power vehicle at different air pressures in the front and rear axle tires. The mathematical modeling results are compared with the field experiment outcomes. The analysis of the curvilinear motion characteristics of the mobile power vehicle indicates a change in the steerability when the volume of operational fluid in the tank varies. The application of a decentralized tire pressure control system, which adjusts based on the wheel load, achieves understeer of the mobile power vehicle across the entire range of operating speeds. Additionally, the maximum deviation from the planned trajectory of movement on the headland does not exceed 8.5 percent. (Conclusions) It is established that the proposed model of the curvilinear motion for the mobile power vehicle, which considers the dependence of the lateral slip of ultralow-pressure tires on tire air pressure and acting forces, allows for obtaining a highly accurate turning trajectory. |
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| ISSN: | 2073-7599 |