Efficiency of differential pressure regulation in tires under conditions of off-road passability and mobility
DOI:
https://doi.org/10.31734/agroengineering2023.27.022Keywords:
full drive, efficiency, separate pressure regulation, permeability, supporting surfaceAbstract
The article discusses the problem of increasing the efficiency of full-drive high-passability vehicles by optimizing the air pressure in tires. The tire pressure control system provides "adaptation" of the wheels to the different physical and mechanical properties of the supporting surface, which reduces the depth of the track and increases the contact surface area with the ground. However, using systems that set the same air pressure values in the tires of all wheels does not allow for optimizing the pressure depending on the physical and mechanical properties of the supporting surface and the load on the wheels. Therefore, the author proposes to use the systems that allow for separately regulating the air pressure in the tires of each wheel, which will increase the efficiency of wheeled vehicles. The impact of this factor on the load-carrying capacity is examined and its significance is indicated. It is noted that with a change in tire pressure and each new pass of the wheel over the supporting surface, the physical and mechanical characteristics of the ground change. The question of forming a unified complete methodology for evaluating the passability of wheeled vehicles and selecting the main design parameters remains relevant. Approaches to modeling the process of vehicle movement on a deformed supporting surface with consideration of the changes in the physical and mechanical characteristics of the soil are considered. The research found that reducing tire pressure can improve the load-carrying capacity parameters on a deformed surface, but the results depend on the type of soil, the size of the vehicle, and the normal average pressures. Using a MATLAB Simulink-based off-road vehicle simulation model, the author obtained values for the maximum possible off-road speeds, which demonstrate sufficient adequacy with experimental studies on high-passability vehicles, but require additional experimental research and adequacy assessment. The obtained results serve as the basis for the parametric optimization of the tire pressure distribution system in full-drive vehicles.
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