DEFORMATION OF A FLEXIBLE STRUCTURE USING AN ACTUATING SYSTEM FOR ENHANCING PERFORMANCE

摘要

A technique of deforming a flexible wing to achieve a specified roll rate at all dynamic pressures is examined. The flexible structure is obtained by using optimization approach. Rather than using an aileron system for roll, antisymmetric elastic twist and camber is determined to achieve the required rolling moment for a specified roll rate. The elastic twist and camber is achieved by providing a system of actuating elements distributed within the internal substructure of the wing to provide control forces. The modal approach is used to develop equilibrium equations for the steady roll maneuver of a wing subjected to aerodynamic loads and the actuating forces. The distribution of actuating forces to achieve specified flexible roll rate was determined by using an iterative procedure in conjunction with an optimal control design approach. Here, a full-scale realistic wing is considered for the assessment of strain energy as a measure of the necessary power required to produce the antisymmetric twist and camber deformation to achieve the required roll performance at different Mach numbers.