Laser dynamic testing system of helicopter rotor blade flap and lag angles

A novel dynamic testing system for helicopter rotor blade flap and lag angles based on the optical triangulation measuring and the displacement measurement technology with CCD is presented and developed A tribrach structure was fixed on the hub of helicopter The optical triangulation displacement sensors and CCD displacement sensors were fixed on the every cantiliver To guarantee that the system can work in complicated condition makes use of the filter glass, the modulation technique for laser diode, the auto gain control and auto power control circuit etc Also the experimental testing results were presented