NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Sensitivity Analysis of Linear Programming and Quadratic Programming Algorithms for Control AllocationThe Next Generation (NextGen) transport aircraft configurations being investigated as part of the NASA Aeronautics Subsonic Fixed Wing Project have more control surfaces, or control effectors, than existing transport aircraft configurations. Conventional flight control is achieved through two symmetric elevators, two antisymmetric ailerons, and a rudder. The five effectors, reduced to three command variables, produce moments along the three main axes of the aircraft and enable the pilot to control the attitude and flight path of the aircraft. The NextGen aircraft will have additional redundant control effectors to control the three moments, creating a situation where the aircraft is over-actuated and where a simple relationship does not exist anymore between the required effector deflections and the desired moments. NextGen flight controllers will incorporate control allocation algorithms to determine the optimal effector commands and attain the desired moments, taking into account the effector limits. Approaches to solving the problem using linear programming and quadratic programming algorithms have been proposed and tested. It is of great interest to understand their relative advantages and disadvantages and how design parameters may affect their properties. In this paper, we investigate the sensitivity of the effector commands with respect to the desired moments and show on some examples that the solutions provided using the l2 norm of quadratic programming are less sensitive than those using the l1 norm of linear programming.
Document ID
20110012890
Acquisition Source
Ames Research Center
Document Type
Conference Paper
Authors
Frost, Susan A.
(NASA Ames Research Center Moffett Field, CA, United States)
Bodson, Marc
(Utah Univ. Salt Lake City, UT, United States)
Acosta, Diana M.
(NASA Ames Research Center Moffett Field, CA, United States)
Date Acquired
August 25, 2013
Publication Date
April 6, 2009
Subject Category
Aircraft Stability And Control
Report/Patent Number
ARC-E-DAA-TN-369
Meeting Information
Meeting: AIAA Infotech@Aerospace Conference and Exhibit
Location: Seattle, WA
Country: United States
Start Date: April 6, 2009
End Date: April 9, 2009
Sponsors: American Inst. of Aeronautics and Astronautics
Funding Number(s)
WBS: WBS 561581.02.08.01.1 7.02
Distribution Limits
Public
Copyright
Public Use Permitted.
No Preview Available