Design And Realization Of Wind Tunnel Data Acquisition System

Wind tunnel is used for the aircraft aerodynamic simulation test to acquire a variety of aerodynamics data. Wind tunnel test data acquisition depends mainly on wind tunnel data acquisition system. So the system is one of the important parts of wind tunnel. The development of advanced wind tunnel may enhance efficiency, accuracy and wind tunnel experimental level, playing an important role on the aerodynamic research.This thesis first studies the composition principle of wind tunnel data acquisition system and related application technology. On the basis of a detailed analysis of user needs, virtual instrument technology is used to design the hardware and the software. The hardware system which bases on the PXI composes of sensors, signal modules, data amplifiers, acquisition modules and industrial control computer. The software system which uses LabWindows/CVI software tools to develop contains such programs as main control module, static data acquisition module, dynamic data acquisition module, data analysis and processing module, files management module and network communication module.Wind tunnel data acquisition system designed in this thesis has successful in debugging. It has started test models and provids a reliable test platform for China's aerodynamics researching. Experiments show that the system fully satisfies the design requirements, demonstrating its high automation and efficiency. It may shorten the experiment time and improve precision. So the market competitiveness of wind tunnel is enhanced, and it creates a good social and economic benefits.