技术中心

【英文篇名】 Fault diagnosis of water chillers based on wavelet-packet analysis 【作者中文名】 郑洁; 孙海军; 张霞; 【作者英文名】 Zheng Jie~★Sun Haijun Zhong Xia★Chongqing University; Chongqing; China; 【作者单位】 重庆大学; 【文献出处】 暖通空调, Heating Ventilating 小波包分析; 故障诊断; 特征参数; 诊断准则; 【英文关键词】 single-screw chiller; wavelet-packet analysis; fault diagnosis; characteristic parameter; diagnostic principle; 【摘要】 模拟了单螺杆式冷水机组的9个常见故障,选取压缩机吸气温度和压缩机排气温度作为故障诊断的特征参数,将特征参数进行小波包分解和重构,提取故障特征信号,建立了特征向量-系统状态的对应关系。 【英文摘要】 Simulates nine common faults of single-screw chillers.Considers the suction temperature and exhaust temperature of the compressor as characteristic parameters,decomposes and reconstructs the characteristic parameters by wavelet-packet analysis method,extracts the signals of fault characters,and establishes the relationship between characteristic vector and system state. 【基金】 重庆市建委资助项目(编号：城科字2003第(30)号);; 重庆大学骨干教师资助项目(编号：2003A45)