Engineering Machinery Hydraulic Chassis Simulation Decoupling Control Study

The construction machinery hydrostatic undercarriage test platform is made up on the basis of the hydraulic system's predigesting and to meet the needs of the construction vehicle hydraulic system's researching, after analyzed some existed similar test platform.The signals between the driving system and the loading system are interfered by each other. This coupling effect results in debasing the performance of the plat and the analysis of the experiment data. This article is based on the establishment of the driving system and loading system of the test platfrom. Furthermore, this paper analyzed the dynamic characteristic of the coupling effect for the driving system and the loading system on the basis of analyzing three different decoupling precepts: hardware decoupling, criterion decoupling, configuration fixity decoupling. A conclusion is made that the configuration fixity decoupling precept is the best way to decouple the coupling of the driving system and loading system. Through the analysis of the characteristic of the two system's combined work after the decoupling, it is proved that the precept fufill the loading precision of the test platform. Meanwhile, it meets the convenience when the platform simulates the various conditions and tested systems.