基于LabVIEW的颤振激励信号生成与测试系统研究

摘要

基于NI公司的数据采集硬件设备,结合跨音速风洞颤振试验特点,用LabVIEW语言为颧振试验设计了一套激励信号生成与多通道同步动态信号采集系统.设计的系统成功实现了新型IEPE传感器和传统电荷式传感器兼容、加速度信号与应变信号同步采集、激励信号生成与多通道数据采集同步、直接内存读取数据、数据尤限时存盘、信号实时显示等方面的功能.经试验验证,该系统设计方案完全满足颤振试验数据采集的要求,获得良好的测试结果,在多功能同步采集系统设计方丽取得了技术性应用成果.%Based on the characteristics of flutter test in wind tunnel and NI DAQ equipments, a dynamic synchronous data acquisition (DAQ) system with excitation signal generation was designed for flutter test based on LabVIEW.The system can realized several functions, such as compatibility for IEPE transducer and traditional charge transducer, synchronous data acquisition of acceleration signal and strain signal, synchronous signal generation and DAQ, direct memory access, unlimited data streaming as well as dynamic signal real-time display.The validation test showed that the designed system could meet the requirements of flutter test and it was a successful technique application of signal generation and multi-channel dynamic DAQ for flutter test in wind tunnel.