俯仰-滚转耦合两自由度大振幅非定常实验技术

主要介绍了一套用于３ｍ低速风洞的俯仰－滚转两自由度大振幅非定常实验系统。该系统由三大部分组成：俯仰－滚转两自由度的模型动态支撑机构；俯仰－滚转两自由度电控液压系统；数据采集与处理软件系统。该系统可以在风洞中真实模拟飞行器姿态变化，并测量其相应的六分量非定常气动力变化。为飞行器的飞行力学动态性能分析或飞行模拟器提供非定常气动力数据。另外，用三角翼在３ｍ风洞进行了多种运动状态的非定常气动力特性测量，结果真实地反映了大迎角与大滚转角时三角翼的非定常气动特性

Test Technology of Unsteady Aerodynamic Charact eristic for a Model Oscillating in Large Amplitude Pitching-Rolling Motion

The test system in unsteady wind tunnel for modelling p itching-rolling motion with large amplitude is introduced, and this system is b uilt in 3 m low speed wind tunnel in Nanjing University of Aeronautics & Astronautics , and it includes three parts dynamic mount of pitching-rolling unst eady rig model; electronic-control servo-va lve system for pitching-rolling motion; data acquisition and processing softwa re. This system can be used to simulate the real status change of the aircraft i n the wind tunnel and to measure six components of unsteady aerodynamics for fli ght dynamics analysis and flight simulation. The unsteady aerodynamic characteri stics of a delta wing in this system are tested and the results indicate the aer odynamic characteristics of the delta wing oscillating in large amplitude pitch ing-rolling mo tion.