Structural Design of Wing Twist for Pitch Control of Joined Wing Sensor Craft

摘要: Abstract : This research investigated two aspects of the aft wing structure a joined SensorCraft. First, efficacy novel approach for incorporating twist pitch control was analyzed. design involved adding spanwise sliding joint into at lower spar vehicle's wing. Second, section where forward and wings connect form outboard redesigned analyzed to improve load transmission between spars. Using MSC.NASTRAN, linear non-linear static analyses were performed examine efficiency forces required achieve sufficient angular deflections control. MSC.Patran then used perform post-processing raw data. Several variations location composite ply angles conducted. The produced marked improvement in deflection over baseline configuration. Surprisingly, however, angle did not have large effect on resulting deflections. Additional joints incorporated no notable improvements obtained either. Although strain induced by order aerodynamic alone, force significantly reduced slit all cases. Flutter speed differ notably addition wing, yet some reduction buckling strength noted. planform does appear recover resistance lost due slit.