Control of Large-Order Space Structures
Final rept. 15 Aug 1986-15 Sep 1987
VIRGINIA POLYTECHNIC INST AND STATE UNIV BLACKSBURG DEPT OF ENGINEERING SCIENCE AND MECHANICS
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Work during this period had been concerned with 1 optimal maneuvering of flexible spacecraft and 2 control of damped distributed structures. The problem of simultaneous maneuvering and vibration control is solved by means of a perturbation approach. The control policy for the perturbations involves the solution of a time-varying linear regulator problem capable of accommodating persistent disturbances. Control of self-adjoint undamped distributed structures can be carried out conveniently by modal control. Nonproportional damping tends to destroy the self-adjointness of the system, so that modal control is not as convenient as for undamped structures. If damping is relatively small, however, it is possible to base the control design on the self-adjoint system and still obtain satisfactory control performance.
- Manned Spacecraft