Simulation of an Excavator Hydraulic System Using Nonlinear Mathematical Models

This paper describes a mathematical modelling methodology developed for the rapid simulation of an excavator hydraulic system.The modelling approach presented enables a reduction of the control system development time for a complete excavator, while providing accurate system dynamics.A tool for defining an appropriate control strategy is a key point for satisfying the need for systems with better energyefficiency.Moreover, the model will be a significant support in investigating energy recovery solutions and evaluating the suitability of hybrid solutions (mechanical/hydraulic/electric).The hydraulic model, composed of the pump's grey box model and the valve block white box model, has been validated on the basis of a set of experimental data collected on a test bench.The results of this study are presented in this paper.