Research
Robust control and identification of large flexible space structures: |
| Posted by Administrator (admin) on Dec 12 2007 at 7:49 PM |
| Research >> Aerospace Engineering Research |
Robust control and identification of large flexible space structures:
Faculty: Marco P. Schoen
Project Description:
Large space structures exhibit very low damping ratios and relatively
low natural frequencies. Space structures are frequently repositioned
to accurately point to a new location on earth or in orbit. This
pointing ability is often of very high accuracy. For example, a mobile
communication system mission requires that the antenna will have to
point to within 0.03 degrees root mean square. The positioning rockets
induce considerable vibration on the structure and due to the low
damping are most undesirable. It is therefore paramount for the
operation of such large space structures to control these induced
vibrational modes. An additional problem is the representation of the
space structure in a compact mathematical form, since such structures
tend to have a very large number of states. System identification
algorithms are being developed for such problems. In addition, robust
controllers are proposed that improve the performance of the dynamics
of existing space structures.
Publications see (2003, [11]).