Results 151 to 160 of about 1,636,411 (202)
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Minimum drag control allocation
21st Atmospheric Flight Mechanics Conference, 1996Continued research into the direct control allocation problem with rate limiting has led to consideration of a modified problem in which control generated drag is considered as a fourth objective (in addition to the 3 moments). This allocation scheme uses the controls' effectiveness in generating moments as well as their effectiveness in generating ...
Wayne C. Durham +2 more
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Control Allocation and Zero Dynamics
Journal of Guidance, Control, and Dynamics, 1996Closed-loop stability for dynamic inversion controllers depends on the stability of the zero dynamics. The zero dynamics, however, depend on a generally nonlinear control allocation function that optimally distributes redundant controls. Therefore, closed-loop stability depends on the control allocation function.
James Buffington, Dale Enns, Andrew Teel
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Resolving actuator redundancy—optimal control vs. control allocation☆
Automatica, 2005zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Härkegård, Ola, Glad, S. Torkel
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Control allocation-based fault tolerant control
Automatica, 2019zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Argha, Ahmadreza +2 more
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Tailless aircraft control allocation
Guidance, Navigation, and Control Conference, 1997Abstract : This paper presents a flight controller for a tail-less aircraft with a large suite of conventional and unconventional control effectors. The controller structure is modular to take advantages of individual technologies from the areas of plant parameter estimation, control allocation, and robust feedback control.
James Buffington, James Buffington
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Decentralized Control with Optimal Control Allocation
2007 IEEE International Conference on Networking, Sensing and Control, 2007Control allocation problem is the key of cooperation control systems and has attracted a lot of attention of researchers. This paper proposes a nonlinear control allocation framework to provide a common optimal solution for decentralized cooperation control systems. The framework includes the allocation controller and feedback control law.
Weirong Liu, Jianqiang Yi, Dongbin Zhao
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Control allocation with adaptive failure control
22nd Atmospheric Flight Mechanics Conference, 1997In the age of modern aircraft and fly-by-wire control systems, the inclusion of mechanical backup systems for handling instances of control failures is becoming more uncommon. As a result, pilots are forced to fully rely on the failure immunities designed into these systems and be assured that, should such failures occur, the aircraft maintain adequate
John Bolling +3 more
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Controlled trials: allocation concealment, random allocation, and blinding
BMJ, 2015The efficacy of nicotine patches in pregnant women who smoke was investigated using a randomised placebo controlled trial. The intervention was the administration of 16 hour nicotine patches until the time of delivery. Participants were 402 pregnant women older than 18 years who smoked at least five cigarettes a day and whose babies were between 12 and
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Guidance, Navigation, and Control Conference and Exhibit, 1998
The control allocation problem is defined in terms of solving or approximately solving a system of linear equations subject to constraints for redundant actuator control variable commands. There is one equation for each controlled axis. The constraints arise from actuation rate and position limits.
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The control allocation problem is defined in terms of solving or approximately solving a system of linear equations subject to constraints for redundant actuator control variable commands. There is one equation for each controlled axis. The constraints arise from actuation rate and position limits.
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Integrated reconfigurable control allocation
AIAA Guidance, Navigation, and Control Conference and Exhibit, 2001This paper presents the development of an integrated reconfigurable control allocation approach. This integrated approach combines frequencyapportioned control allocation with actuator failure detection and isolation. Frequency-apportioned control allocation integrates innovative control effectors with conventional aerodynamic controls and considers ...
Frederick Lallman +2 more
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