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Multivariable techniques for high-speed research flight control systems
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Newman, Brett A. |
| Copyright Year | 1999 |
| Description | This report describes the activities and findings conducted under contract with NASA Langley Research Center. Subject matter is the investigation of suitable multivariable flight control design methodologies and solutions for large, flexible high-speed vehicles. Specifically, methodologies are to address the inner control loops used for stabilization and augmentation of a highly coupled airframe system possibly involving rigid-body motion, structural vibrations, unsteady aerodynamics, and actuator dynamics. Design and analysis techniques considered in this body of work are both conventional-based and contemporary-based, and the vehicle of interest is the High-Speed Civil Transport (HSCT). Major findings include: (1) control architectures based on aft tail only are not well suited for highly flexible, high-speed vehicles, (2) theoretical underpinnings of the Wykes structural mode control logic is based on several assumptions concerning vehicle dynamic characteristics, and if not satisfied, the control logic can break down leading to mode destabilization, (3) two-loop control architectures that utilize small forward vanes with the aft tail provide highly attractive and feasible solutions to the longitudinal axis control challenges, and (4) closed-loop simulation sizing analyses indicate the baseline vane model utilized in this report is most likely oversized for normal loading conditions. |
| File Size | 9629950 |
| Page Count | 294 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20000012320 |
| Archival Resource Key | ark:/13960/t3nw4db6b |
| Language | English |
| Publisher Date | 1999-12-01 |
| Access Restriction | Open |
| Subject Keyword | Aircraft Stability And Control Control Simulation Rigid Structures Actuators Multivariable Control Control Systems Design Structural Vibration Stability Augmentation Feedback Control Flight Control Aerodynamic Stability Aircraft Control Longitudinal Control Simulation Airframes Unsteady Aerodynamics Sequential Control Supersonic Transports Aircraft Configurations Destabilization 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 |
