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In order to apply virtual prototyping technology to the transmission system of construction machinery, shorten the test cycle effectively and save energy, a virtual test system of hydraulic mechanical transmission of construction machinery is established by using Visual C++ programming technology and ADAMS virtual prototyping technology. The composition of the hydraulic mechanical transmission system of construction machinery and the performance characteristics of its components, as well as the test method of the hydraulic mechanical transmission system, the matching principle between engine and hydraulic torque converter are analyzed. Additionally, the man-machine interaction interface of the virtual test system of hydraulic mechanical transmission of construction machinery is designed with Visual C++ software. According to the test that the virtual test system needs to complete and the parameters that each test needs to set, the design of human-computer interaction interface of the virtual test system of hydraulic mechanical transmission is completed by adding various controls to the Visual C++ software programming interface; the model of hydraulic torque converter and gearbox in the hydraulic mechanical transmission system is established by using ADAMS virtual prototype technology, and the diesel engine model is established at the same time. The attribute files and model parameters of each part of the transmission system are modified to make the performance of each part in the virtual test system consistent with that of the transmission system components to be tested. The results show that a complete virtual simulation test system for hydraulic chassis of construction machinery is established through the above analysis and research. Therefore, the research will play a guiding and reference role in the scientific research of hydraulic chassis test of construction machinery.

DETECTION OF TRANSMISSION SYSTEM OF CONSTRUCTION MACHINERY BASED ON VIRTUAL TECHNOLOGY