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Design of tractor virtual test system based on high-level architecture technology.

Xianghai Yan1,2, Chengyan Shang1, Junjiang Zhang1,2

  • 1College of Vehicle and Traffic Engineering, Henan University of Science and Technology, Luoyang, China.

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Summary

A new distributed virtual test system for tractors, based on High-Level Architecture (HLA), overcomes limitations in model reuse and system expansion. This advanced system ensures real-time virtual testing with minimal data delay, validating tractor performance effectively.

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Area of Science:

  • Agricultural Engineering
  • Simulation and Modeling
  • Virtual Testing Technologies

Background:

  • Existing tractor virtual test systems face limitations in model reuse, system expansion, offsite interconnection, and virtual reality verification.
  • These limitations hinder efficient development and comprehensive testing of tractor systems.

Purpose of the Study:

  • To propose and evaluate a distributed virtual test system for tractors utilizing the High-Level Architecture (HLA).
  • To address the limitations of current virtual test systems by enabling real-time, multi-machine, and interconnected testing.
  • To validate the effectiveness of the proposed system through a virtual test of a tractor's reversing clutch engagement performance.

Main Methods:

  • Development of a distributed virtual test system based on HLA, including hardware analysis, federation construction, and design of Federated Object Model (FOM) and Simulation Object Model (SOM) tables.
  • Integration of multi-domain commercial software and utilization of TCP/IP for real-time, multi-machine interconnection.
  • Performance evaluation through simulation of the tractor's reversing clutch engagement, analyzing simulation performance and data transmission delay.
  • Comparison of virtual test results with bench test results using the gray correlation method.

Main Results:

  • The system achieved a data transmission delay of 9.7ms for a data volume of 5000KB, meeting the <10ms requirement for tractor virtual testing.
  • Virtual testing of the reversing clutch power reversal process showed a duration of 0.7s, with specific parameters for vehicle speed, oil pressure, and peak impact degree.
  • Slip work during the reversing process was measured at 21kJ, and virtual test results showed consistency with bench test data.

Conclusions:

  • The proposed HLA-based distributed virtual test system effectively addresses the limitations of traditional tractor virtual testing systems.
  • The system demonstrates robust simulation performance and low data transmission delay, suitable for real-time virtual testing applications.
  • The virtual test model for the tractor power shift transmission (PST) reversing clutch operates effectively within the developed system, validated by comparison with physical tests.