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Comprehensive lumped parameter and multibody approach for the dynamic simulation of agricultural tractors with tyre–soil interaction

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IET Cyber-Systems and Robotics 2023年第3期5卷 1-23页

作者： Massimo Martelli Damiano Chiarabelli Silvia Gessi Pietro Marani emiliano mucchi Marco Polastri Institute of Sciences and Technologies for Sustainable Energy and Mobility CNR‐STEMSNational Research CouncilFerraraItaly Department of Engineering University of FerraraFerraraItaly

Modern agricultural tractors are complex systems,in which multiple physical(and technological)domains interact to reach a wide set of competing goals,including work operational performance and energy *** complexity translates to the dynamic,multi‐domain simulation models implemented to serve as digital twins,for rapid prototyping and effective pre‐tuning,prior to bench and on‐field ***,a suitable simulation framework should have the capability to focus both on the vehicle as a whole and on individual *** each of the latter,multiple options should be available,with different levels of detail,to properly address the relevant phenomena,depending on the specific focus,for an optimal balance between accuracy and computation *** methodology proposed here by the authors is based on the lumped parameter approach and integrates the models for the following subsystems in a modular context:internal combustion engine,hydromechanical transmission,vehicle body,and tyre–soil *** model is completed by a load cycle module that generates stimulus time histories to reproduce the work load under real operating *** capability is affected by vertical load on the wheels,which is even more relevant if the vehicle is travelling on an uncompacted soil and subject to a variable drawbar pull force as it is when *** vertical load is,in turn,heavily affected by vehicle dynamics,which can be accurately modelled via a full multibody *** presented lumped parameter model is intended as a powerful simulation tool to evaluate tractor performance,both in terms of fuel consumption and traction dynamics,by considering the cascade phenomena from the wheel–ground interaction to the engine,passing through the dynamics of vehicle bodies and their mass *** capabilities and numerical results are presented for the simulation of a realistic ploughing operation.

关键词： agricultural tractor digital twin lumped parameter simulation,multibody powertrain tyre-soil interaction

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