Research On Hydraulic System Simulation And System Integration Of Virtual Excavator Prototype

In order to improve the traditional engineering product design process , this dissertation presents and studies the approach of the new powerful CAD-technology 'Virtual Prototype(VP)'. Especially ,the technique is applied in the field of excavator design to satisfy the market competition requirement of construction engineering enterprise . There are five parts be presented and studied in this paper. First of all is the brief presentation of the basic theory frame of the Virtual Prototype, and the significance and development of VP technology in china and aboard are also related . chapter 1 demonstrates that the VP technology is the only way to improve the traditional excavator design process.The method to build the virtual excavator prototype is given in this paper. The VP is composed of simulation models of subsystems . The virtual prototyping process are based on the early cooperation of experts from different disciplines and then the final integration of modules from these concurrent tasks.To build multidisciplinary models, the composition of excavator is analyzed according to the theories of modeling and simulation .The mechanical system of excavator is parametrized in ADAMS , and the hydraulic system in MATLAB/SIMULINK.On the base of analyzing the characteristics of the two engineering software ADAMS and MATLAB , the interface ADAMS/Controls is redesigned to integrate the hydraulic system model in Simulink and the mechanical system model in ADAMS in order to build the virtual excavator environment and then realize the co-simulation.Applications of virtual prototyping in the scope of excavator development are discussed .The future excavator product will be designed in accordance with the parameters of virtual prototype. With the aid of VP , it can be examined how design requirements are satisfied. The VP' s parameters are according with those of an physical excavator. Instead of physical experiment, the virtual prototype simulation can help to reduce testing cost and even avoid venture.