1　综述随着现代化进程的加快 ,建立自动化、智能化的液压故障诊断专家系统已是迫在眉睫。进行液压系统故障诊断的根本目的在于保证液压系统能够可靠而有效地发挥其功能 ,主要包含三点 :首先是保证液压系统无故障 ,运行可靠 ;其次是“物尽其能”,保证液压系统发挥其最大效益 ; 1 Summary With the acceleration of modernization, the establishment of automated, intelligent hydraulic fault diagnosis expert system is imminent. The fundamental purpose of hydraulic system fault diagnosis is to ensure that the hydraulic system can reliably and effectively perform its functions, including three main points: First, to ensure trouble-free hydraulic system, reliable operation; followed by “do its best” to ensure that the hydraulic system to play Its maximum benefit