Research On The Test Technology Of Dynamic Derivatives Of Φ3.2 M Low Speed Wind Tunnel

Aerodynamic derivatives is one of the most important parameters for the airplane design and oscillation analyse. It is also important data for the design of control law and assessment of airplane's dynamic characteristic. The main research of this passage is development 2 equipments which can realize 1 DOF force oscillation on pitch movement and yaw/roll movement. By doing this, the researcher can deeply analyze the aircraft's unsteady aerodynamic characteristics. For all, the main work of this research as follows.First of all, it has demonstrated the necessity and possibility by investigation the domestic and foreign thesis about the aerodynamic derivatives'research actuality. More the equations of aerodynamic derivatives extracting have been created by the mass-spring and Small Disturbance.Secondly, this paper has researched the hardware configuration the dynamic derivatives acquisition system. Base on the mathematic transform, it also has researched the methods of data processing of derivatives. In addition, the methods have been compared with each other.Thirdly, the cam and parallelogram drive mechanisms both can realize the pitch force oscillation, for this, this paper has argument the 2 methods and chosen the parallelogram drive mechanism for this research. Base on the virtual prototyping technology, the work of pitch force oscillation and yaw/roll force oscillation has been done. Except this, to reduce vibration during the test time, the pole wires have been designed by taking reduce vibration into count.At last, carry out wind tunnel validate test by using the pitch force oscillation rig and compared the acquired data with others which had been acquired from other wind tunnels and other rigs. After doing this, we can get a conclusion that the data which have been tested by pitch force oscillation rig are rational and reliable, the rig can be used to design of an aircraft and research of aerodynamics.