Power-indicating chart is an'effective means to diagnose faults of the reciprocating compressor at a higher level as a parameter method. Based the automatic test system of power-indicating chart developed earlier stage,a suit of fault analysis system based on the distortion of power-indicating chart is developed. The system architecture is composed of an independent fault-rule database and application framework. The system adopts the method of integrated-comparison diagnostics, and can analyze the power-indicating chart automatically. Aimed at the fault power-indicating chart,the numerical type and tendency type characteristic parameters are induced,and corresponding threshold value is set to restrict the range of variation. The fault-rule Database is composed of three data sheets, including characteristic criterion,fault criterion and fault characteristic,and uses the combination of characteristic parameters as fault criterion. The system also supports user-oriented extension of the fault-rule to adapt to the extension application of new research results.%示功图是有效的参数法诊断手段,可在较深层次上诊断压缩机故障.基于前期开发的示功图自动测试系统,研究开发了一个基于示功图畸变的故障分析系统.系统由独立的故障规则库和应用程序框架组成开放式的体系结构,采用综合比较诊断法,可对测试示功图进行自动分析和故障判断；对示功图可显见的压缩机故障,归纳出数值型和变化型两类故障特征参数,并设置参数变化阈值以表征参数的允许变化范围；以特征判据、故障判据和故障特征数据表组成故障规则数据库,以特征参数的组合作为故障判据；系统支持面向用户的故障规则扩展功能,可适应新的研究成果的扩展应用.
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