Abstract
The effects of bearing friction, driving speeds, and external loads on the transmission efficiency of the trailing-edge flap motion mechanism are studied through theoretical analysis and multibody dynamics simulations. The simulation results agree well with theoretical prediction. It is found that the transmission efficiency defined by moment and power shows basically similar change trends with rotation angle and reaches the maximum value at a fixed position independent of external loads, which can be attributed to the different trends of the change of energy consumed by friction and that of input energy. In addition, the transmission efficiency decreases dramatically with the increase of friction coefficient, whereas the driving speed seems to have little effect on it. A further investigation on the effects of load direction indicates an alternative way to improve the transmission efficiency by regulating the direction of the aerodynamic force.
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