| Autor: |
Jeffrey V. Zweber, Duane E. Veley, Alicia Hartong, N. S. Khot |
| Rok vydání: |
2008 |
| Předmět: |
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| DOI: |
10.21236/ada478915 |
| Popis: |
This work combines two efforts that have been on-going in the Air Force Research Laboratory. The first effort is the work of the Design Modeling Group which is using the Adaptive Modeling Language (AML) to develop an object-based technology assessment system. One of the advantages of this effort is that the analytical tools (legacy codes) that are used may be integrated into the AML environment one at a time, thereby providing many intermediate products each of which may enhance productivity. So while this effort is still in its infancy, a graphical user interface to the Automated STRuctural Optimization System (ASTROS) has been developed and is used in this effort to develop a parametrically defined finite element model. The second effort is the work on designing flexible wings without ailerons for performing roll maneuvers. Here a flexible wing is optimized for weight with constraints on strength for a 9-g symmetric pull-up maneuver at M=0.85 at 30 psi and on the modal frequency distribution. Differential wing twist and camber is achieved by providing a system of actuating elements distributed within the internal substructure of the wing to provide roll control power. The modal approach was used to develop equilibrium equations for the steady roll maneuver of a wing subjected to aerodynamic loads and actuating forces. The distribution of actuating forces to achieve a specified flexible roll rate was determined by using an optimal control design approach. Here, full-scale wings are 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. The wings used here break the paradigm of the low aspect ratio wings typical for supersonic vehicles. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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