“GRAY—BOX”MODELING METHOD AND PARAMETERS IDENTIFICATION FOR LARGE—SCALE HYDRAULIC SYSTEM

Modeling and digital simulation is an effective method to analyze the dynamic characteris-tics of hydraulic system,It is difficult to determine some performance parameters in the hydraulic system by means of currently used modeling methods,The "gray-box" modeling method for large-scale hydraulic system is introduced,The principle of the method,the submodels of some com-ponents and the parameters identification of components or subsystem are researched.