Loading...
Please wait, while we are loading the content...
Similar Documents
Interactive aircraft flight control and aeroelastic stabilization (Document No: 19850002695)
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Weisshaar, T. A. |
| Copyright Year | 1984 |
| Description | An analytical model has been used to study the problem of integrated control system/structural dynamic design. This model utilizes the traditional typical section lifting surface with a control surface attached in 2-D unsteady incompressible flow. The studies have as their purpose the examination of the use of the location of the elastic axis of the airfoil as a design variable in the search for an actively controlled configuration that has a specified flutter margin. Items of interest include the determination of flutter speed and divergence speed as functions of a nondimensional parameter, a sub c, that measures the location (in semi-chords) of the elastic axis with respect to the airfoil midchord. All other parameters are fixed. The behavior of velocity root locus curves with changes in a sub c is illustrated. Also shown is an example of the use of sensitivity derivatives to reposition poles of the open loop system. The behavior of the actively controlled or closed loop system is also discussed. A set of examples are presented to indicate how the shear center parameter, a sub c, affects the design of the controlled system. |
| File Size | 908795 |
| Page Count | 22 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19850002695 |
| Archival Resource Key | ark:/13960/t7qp0zp6k |
| Language | English |
| Publisher Date | 1984-11-01 |
| Access Restriction | Open |
| Subject Keyword | Aircraft Stability And Control Structural Design Airspeed Incompressible Flow Sensitivity Airfoils Stiffness Flutter Feedback Control Flight Control Aeroelasticity Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
