 Aerodynamic test Inspection purpose Following are two kinds of aerodynamic experiments, one is wind tunnel experiment, which measures variable angle of attack and attitude angle of the model; the other is flight experiment, which measures wing deformation, or trajectory of missile body, etc. Wind tunnel experiment In a low-speed wind tunnel, the coordinates of the marking points on the surface of the model are measured by the camera, and then
the change of attitude angle is calculated. Measuring site In a vertical wind tunnel, the coordinates of marking points on the surface of projectile (rotating model) are measured,and then the parameters such as attitude angle and rotation acceleration are calculated. Free flight experiement During the flight of a certain type of aircraft, several cameras are installed at the tail of the aircraft to measure the wing deformation. Because the tail of the wing will vibrate, the fixed point is pasted on the back of the aircraft to calibrate the camera vibration dynamically in real time. The trajectory and rotation acceleration of the missile body are measured during the projectile throwing process of a certain type of stealth aircraft, and the deformation of the warehouse door is measured when it is opened or closed. low-speed wind tunnel |