中文摘要：

利用虚拟仪器技术设计和构建了扭振信号采集和分析系统的框架,开发了一种能有效测量和分析扭振的汽轮发电机组扭振测试系统。采用PXI数据采集系统实现了系统的硬件,采用LabVIEW图形化编程语言编制了系统的软件。系统利用汽轮发电机组机端的转速信号,使用零相位数字滤波器直接从转速信号中提取扭振分量。从扭振分量中分离出扭振模态并分析它们的特性。系统已多次应用于电厂的实际调试,实测数据分析显示,该扭振测试系统灵活易用,能满足实际应用的需求。

英文摘要：

A framework of data acquisition system is designed via virtual instrumentation technology,based on which a test system is developed to effectively measure and analyze the torsional vibration of turbogenerator.The PXI system is adopted to configure its system hardware and its system software is programmed with LabVIEW language.The speed signal of turbogenerator is recorded and its torsional vibration components are directly extracted by the zero-phase digital filter.Each torsional vibration mode is separated and its corresponding characteristics are analyzed.The analysis of test data from site applications shows that the system is flexible and applicable.