Inflatable deployable control structures for aerospace vehicles

摘要

The invention discloses a deployable, inflatable aerodynamic control structure for aerospace vehicles which has a desired noncircular or noncylindrical cross-section and fabrication methods therefor. In a preferred embodiment, the control structure is configured as an inflatable airfoil and includes a flexible skin and a plurality of internally disposed airfoil-shaped bulkheads or integral rib members that are arranged, spaced apart, in cross-wise fashion along the axial length of the airfoil shaped control structure. The flexible skin is fabricated as a lay up, in ordered sequence, of plural layers of elastomeric rubber material and plural ply layers of resin-impregnated yarns or fabric. The result is a fiber-reinforced pressure membrane that is flexible and compactly foldable. Rib-to-skin cloth attachments are provided to secure the airfoil-shaped integral rib members to the flexible skin whereby one end of each rib-to-skin cloth attachment penetrates the flexible skin being cured in place between elastomeric layers of the filament- reinforced pressure membrane to provide a seamless airtight sealed connection. The number and spacing of the integral rib members determine the amount of deviation from a perfect airfoil structure that is allowed, since the flexible skin will have a tendency to bulge outwardly at regions between adjacent airfoil-shaped integral rib members.