【摘要】 介绍了一种基于LabVIEW的风洞控制系统中湍流场风速的计算机仿真方法。以Von-Karman谱作为湍流风场的功率谱,建立数学模型,推导出湍流场风速时程的计算表达式。在此基础上利用LabVIEW软件开发设计了风洞湍流场风速的发生程序,并对湍流场风速进行了频域分析和时域分析以及作为主动控制风洞系统的输入信号的仿真与处理。研究分析表明计算机仿真结果符合风洞控制系统的模拟自然风湍流场的要求。更多还原

【Abstract】 A simulation method of wind tunnel wind speed in the turbulent field is discussed based on LabVIEW.The mathematical model of wind tunnel turbulence can be obtained by the Von-Karman spectrum.Then,the LabVIEW program is written to generate the turbulent wind,which is analyzed in time domain and frequency domainin order to meet the performance requirements of natural wind simulation.The research results show that the simulation method can provide a theoretical basis for subsequent research and engineering application of multi-channel wind tunnel control system.更多还原