FMI-based co-simulation method and test verification for tractor power-shift transmission.

Area of Science:

• Agricultural Engineering
• Mechanical Engineering
• Control Systems

Background:

• Tractor power-shift transmission (PST) development involves multiple engineering disciplines.
• Integrating diverse simulation tools for mechanical, control, and electronics domains is challenging.

Purpose of the Study:

• To propose a multi-domain co-simulation method for PST systems based on the Functional Mock-up Interface (FMI) standard.
• To enhance the efficiency and accuracy of tractor PST system development.

Main Methods:

• Established individual models for PST mechanical, control, engine, and dynamic systems.
• Integrated these models into a unified PST co-simulation model using the FMI standard.
• Analyzed the FMI-based simulation mechanism and system logical structure.

Main Results:

• Simulation and test results for starting time, speed curves, and final drive half shaft torque showed high consistency.
• The average Theil's inequality coefficient (TIC) for speed was 0.1375, below the 0.25 threshold.
• Validated the accuracy and feasibility of the proposed PST co-simulation model and method.

Conclusions:

• The FMI-based co-simulation method is accurate and feasible for tractor PST development.
• This approach can significantly improve the efficiency of tractor PST system research and development.
• The validated model provides a reliable tool for simulating complex tractor transmission systems.