A Parametric Design Study for Actively Controlled Trailing Edge Flaps

摘要

A parametric design study is conducted for a plain trailing edge flap system for a typical helicopter . the results show that plain flaps provide an effective means of implementing multicyclic control. Significant reductions in fixed system 4/rev hub loads, are predicted. The flap motions may be optimized for reductions in either hub shears or hub moments by varying a scalar weight- ing parameter in the control algorithm. The effects of variations in flap length, spanwise location, chord, and aerodynamic ef- fectiveness could be largely offset by compensating adjustments to the flap commands as determined by the multicyclic algo- rithm. Required trailing edge flap power is minimized by reducing the flap chord to the smallest practical value.