Self Optimizing Flexible Technology Wing Program, Semispan Wind Tunnel Test of a Generalized Geometry Wing Panel. Model Design and Aerodynamic Analysis.
Abstract
Various aspects of the design and stress, flutter, aerodynamic and computer analyses are presented for a 1/6th scale semispan Self-Optimizing Flexible Technology (SOFT) Wing Wind Tunnel Model representative of the AFTI-111 configuration, to be tested at AEDC tunnel 16T. The model features twelve independent hydraulic actuator systems which are designed to conformally vary leading edge radius, leading edge deflection about the 15% and 25% chord lines, upper surface humping, and trailing edge deflection about the 65% and 80% chord lines at an inboard and outboard station. The model is designed to be tested interactively under computer control in such a manner so as to optimize any one of eighteen possible aerodynamic (or structural) functions, while satisfying equality (or inequality) constraints with the remaining seventeen. These functions are to be measured 'on line' by either the wind tunnel balance, potentiometers, wing pressure orifices or strain gages. Simulations of the wing optimization procedure are presented using a highly simplified set of nonlinear algebraic equations to generate the aerodynamic functions. The simulations show that convergence may be obtained for various optimization problems, even when randomly generated testing type errors are included, provided however, that the various parameters in the optimization computer program have been properly tuned for the particular optimization problem. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 14, 1977
- Accession Number
- ADA039085
Entities
People
- A. A. Mcclain
- Ely S. Levinsky
- R. H. Schappelle
Organizations
- General Dynamics