Flexible space structure model reduction by modal cost analysisIt is noted that reduced models and reduced controllers for flexible space structures are obtained by retaining those modes which make the greatest contribution to quadratic control objectives. Attention is given to the relative importance of damping, frequency and mode shapes in the mode truncation decisions for the following control objectives: attitude control, vibration suppression and figure control. It is also shown that using Modal Cost Analysis (MCA) on the closed loop modes of the optimally controlled system allows the construction of reduced control policies which feedback only those closed loop coordinates which are most critical to the quadratic control performance criterion. In this manner, the modes which need to be controlled are deduced from truncations of the optimal controller.
Document ID
19800047526
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Skelton, R. E. (Purdue University West Lafayette, Ind., United States)
Hughes, P. C. (Toronto, University Toronto, Canada)
Date Acquired
August 10, 2013
Publication Date
January 1, 1979
Subject Category
Spacecraft Design, Testing And Performance
Meeting Information
Meeting: Dynamics and control of large flexible spacecraft