Background: Hydraulic excavator as important engineering machinery plays an extremely
significant role in engineering construction. Multi-way valve is the core element of hydraulic system of
excavator, which is used for controlling the flow of oil and the flow distribution of actuators, its performance
has important implications for the whole machine.
Objective: In order to guide the design and optimization of spools of main valve of a medium hydraulic
excavator quickly, a numerical simulation model of hydraulic system of working device was built based
on AMESim. But it is impossible to simulate the ever-changing load accurately just with numerical
Methods: To make up the shortage, a real-time testing system for excavator based on CompactRIO was
built. Then the simulation model was embedded into the testing system through interface modules to
establish a semi-physical simulation platform for hydraulic system. The platform was used to test and
simulate the hydraulic system of the excavator’s working device.
Results: It shows that the simulation results are in good agreement with the measured data, which
means the platform performs well.
Conclusion: The platform has great significance to accelerate the design and development of main
valves, and it also can provide strong support for analysis and research of hydraulic system of excavator.
It could be of great significance both in designing multi-way valve and reducing the debugging