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Flexible modes control using sliding mode observers: application to ares i
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Baev, Simon Orr, Jeb S. Shtessel, Yuri B. Hall, Charles E. |
| Copyright Year | 2010 |
| Description | The launch vehicle dynamics affected by bending and sloshing modes are considered. Attitude measurement data that are corrupted by flexible modes could yield instability of the vehicle dynamics. Flexible body and sloshing modes are reconstructed by sliding mode observers. The resultant estimates are used to remove the undesirable dynamics from the measurements, and the direct effects of sloshing and bending modes on the launch vehicle are compensated by means of a controller that is designed without taking the bending and sloshing modes into account. A linearized mathematical model of Ares I launch vehicle was derived based on FRACTAL, a linear model developed by NASA/MSFC. The compensated vehicle dynamics with a simple PID controller were studied for the launch vehicle model that included two bending modes, two slosh modes and actuator dynamics. A simulation study demonstrated stable and accurate performance of the flight control system with the augmented simple PID controller without the use of traditional linear bending filters. |
| File Size | 457800 |
| Page Count | 22 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20100035662 |
| Archival Resource Key | ark:/13960/t0dv6ht2b |
| Language | English |
| Publisher Date | 2010-08-02 |
| Access Restriction | Open |
| Subject Keyword | Launch Vehicles And Launch Operations Flexible Bodies Control Systems Design Ares 1 Launch Vehicle Sliding Flight Control Pitch Inclination Attitude Inclination Algorithms Launch Vehicles Simulation Bending Mathematical Models Frequency Response Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
