Flutter of Control Surfaces with Structural Nonlinearities
Final rept. 1 Jun 1976-31 Aug 1977
MCDONNELL DOUGLAS ASTRONAUTICS CO ST LOUIS MO
Pagination or Media Count:
Missile control surface systems often contain structural nonlinearities which affect their performance characteristics and flutter boundaries. Presented in this report are flutter analysis procedures which have been developed to evaluate the potential influence of these nonlinearities on control surface flutter. Three type nonlinearities, freeplay, preload, and friction, have been investigated. The describing function technique, which has found application in dealing with nonlinearities in automatic control systems, has been used to mathematically represent these nonlinearities during the investigation. A simplified representation of the aerodynamic loadings acting on the control surface has been assumed and the techniques have application for either a rigid or flexible control surface. Numerous examples of the application of the developed flutter analysis techniques are presented.
- Guided Missiles
- Fluid Mechanics