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Control Allocation with Load BalancingNext generation aircraft with a large number of actuators will require advanced control allocation methods to compute the actuator commands needed to follow desired trajectories while respecting system constraints. Previously, algorithms were proposed to minimize the l1 or l2 norms of the tracking error and of the actuator deflections. The paper discusses the alternative choice of the l(infinity) norm, or sup norm. Minimization of the control effort translates into the minimization of the maximum actuator deflection (min-max optimization). The paper shows how the problem can be solved effectively by converting it into a linear program and solving it using a simplex algorithm. Properties of the algorithm are also investigated through examples. In particular, the min-max criterion results in a type of load balancing, where the load is th desired command and the algorithm balances this load among various actuators. The solution using the l(infinity) norm also results in better robustness to failures and to lower sensitivity to nonlinearities in illustrative examples.
Document ID
20100024149
Acquisition Source
Ames Research Center
Document Type
Conference Paper
Authors
Bodson, Marc (Utah Univ. Salt Lake City, UT, United States)
Frost, Susan A. (NASA Ames Research Center Moffett Field, CA, United States)
Date Acquired
August 24, 2013
Publication Date
August 10, 2009
Subject Category
Aircraft Stability And Control
Report/Patent Number
ARC-E-DAA-TN656
Meeting Information
Meeting: AIAA Guidance, Navigation, and Control Conference
Location: Chicago, IL
Country: United States
Start Date: August 10, 2009
End Date: August 13, 2009
Sponsors: American Inst. of Aeronautics and Astronautics
Funding Number(s)
WBS: WBS 561581.02.08.01.16.02
Distribution Limits
Public
Copyright
Public Use Permitted.

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