Structure/Control Synthesis with Nonnegligible Actuator Mass
Publication: Journal of Aerospace Engineering
Volume 6, Issue 1
Abstract
Simultaneous design of a structure/active control system in which the mass of the actuators required to implement the active control is considered is addressed. The inclusion of required actuator mass essentially tightens the coupling between structure and control dynamics and introduces an inner iteration loop in the overall design process. Because this inner iteration loop significantly increases the computational burden, an algorithm for estimating the required actuator mass, given the control law and the desired maneuver, is presented. Additionally, a secant‐based actuator mass update algorithm is investigated in order to improve convergence characteristics of the inner iteration loop. A nonlinear optimization algorithm is used to direct the design process. The methodology is demonstrated on the design of a large two‐dimensional L‐shaped structure in which it is desired to minimize the line‐of‐sight‐pointing error between the two ends of the L after a worst‐case slew maneuver.
Get full access to this article
View all available purchase options and get full access to this article.
References
1.
Bloebaum, C. (1987). “Verification of the global sensitivity equations in structure/control design,” MS thesis, Univ. of Florida, Gainesville, Fla.
2.
Fletcher, R. (1970). “A new approach to variable metric algorithms.” Computer J., 13(3), 317–322.
3.
Gill, P. E., Murray, W., and Wright, M. H. (1981). Practical optimization. Academic Press, London, England, 176–180.
4.
Hale, A. L., Lisowski, R. J., and Dahl, W. E. (1985). “Optimal simultaneous structural and control design of maneuvering flexible spacecraft.” J. Guidance and Control, 8(1), 86–93.
5.
Han, S. P. (1977). “A globally convergent method for nonlinear programming.” J. Optimization Theory and Applications, 22, 297–301.
6.
Khot, N. S., Eastep, F. E., and Venkayya, V. B. (1986). “Optimal structural modifications to enhance the optimal active vibration control of large flexible systems.” AIAA J., 24(8), 1368–1374.
7.
Lust, R. V., and Schmit, L. A. (1986). “Control augmented structural synthesis.” AIAA/ASME/ASCE/AHS 27th SDM Conf., ASCE, New York, N.Y.
8.
Meirovitch, L. (1980). Computational methods in structural dynamics. Sijthoff & Noordhoff, Alphen aan den Rijn, The Netherlands, 102–109.
9.
Moler, C., Little, J., and Bangert, S. (1989). MATLAB users guide. The Mathworks, Inc., South Natick, Mass.
10.
Sage, A. P., and White, C. C. (1977). Optimum systems control. 2nd Ed., Prentice‐Hall, Inc., Englewood Cliffs, N. J., 103–111.
11.
Sobieszczanski‐Sobieski, J., Bloebaum, C. L., and Hajela, P. (1988). “Sensitivity of control‐augmented structure obtained by a system decomposition method.” AIAA/ASME/ASCE/AHS 29th SDM Conf., ASCE, New York, N. Y.
Information & Authors
Information
Published In
Copyright
Copyright © 1993 American Society of Civil Engineers.
History
Received: Jun 6, 1991
Published online: Jan 1, 1993
Published in print: Jan 1993
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.