中国振动工程学会模态分析与试验专业委员会第六届学术交流会于1991年10月22日到26日在福建省崇安县召开。参加会议代表106人,其中36岁以下青年代表占26.7%,收到论文136篇。会上由杨叔子教授、傅志方教授、陈予恕教授、吴有生研究员分别作了题为:机械设备诊断理论与方法研究; China Vibration Engineering Society of Modal Analysis and Experimental Committee of the sixth academic exchange in October 22, 1991 to 26 in Chongan County, Fujian Province. There were 106 delegates to the conference, including 26.7% of young people under 36, and 136 papers. At the meeting, Prof. Yang Shuzi, Prof. Fu Zhifang, Professor Chen Yushen and researcher Wu Yousheng made a presentation entitled: Theories and Methods of Mechanical Equipment Diagnosis;