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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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A reconfigurable Direct Control Allocation method
2013 European Control Conference (ECC), 2013In the event of failure of actuators in an overactuated system a reconfigurable law is required to redistribute and coordinate the control effort among the remaining healthy actuators. In this paper, a modified lookup table based Direct Control Allocation method is proposed for reconfiguration of actuator command, for a single actuator fault, without ...
Asim Kumar Naskar +2 more
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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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Observer-based nonlinear control allocation
Proceedings of the 2010 American Control Conference, 2010In this paper, a Lyapunov-based approach is proposed for control allocation problem based on output feedback and model reference control. A nonlinear observer design approach for a general class of nonlinear systems is used to estimate the unmeasurable system states.
Fang Liao, Kai-Yew Lum, Jian Liang Wang
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A hierarchical control architecture for resource allocation
2012 12th International Conference on Control Automation Robotics & Vision (ICARCV), 2012Complex systems consist of a large number of entities with their independent local rules and goals, along with their interactions. In the operations of complex system, such as naval ship, proper decisions and controls are required to keep the system working functionally and effectively.
Yongchang Li, Dimitri Mavris
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Constrained control allocation
Astrodynamics Conference, 1992This paper addresses the problem of the allocation of several airplane flight controls to the generation of specified body-axis moments. The number of controls is greater than the number of moments being controlled, and the ranges of the controls are constrained to certain limits.
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A nonlinear programming approach for control allocation
Proceedings of the 2004 American Control Conference, 2004A novel nonlinear programming based control allocation scheme is developed. The performance of this nonlinear control allocation algorithm is compared with that of other control allocation approaches, including a mixed optimization scheme, a redistributed pseudo-inverse approach, and a direct allocation (geometric) method.
Vishnu L. Poonamallee +3 more
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Control allocation-based adaptive control for greenhouse climate
International Journal of Systems Science, 2018ABSTRACTThis paper presents an adaptive approach to greenhouse climate control, as part of an integrated control and management system for greenhouse production.
Yuanping Su, Lihong Xu, Erik D. Goodman
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Disagreement and the Allocation of Control
SSRN Electronic Journal, 2006I study how to allocate control (over one or multiple projects) when people may openly disagree on the optimal course of action. I first show that, in the efficient allocation, complementary decisions should be decided by the same person, while substitute decisions should be decided by different people.
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A control allocation approach to haptic control of underwater robots
2015 IEEE International Workshop on Advanced Robotics and its Social Impacts (ARSO), 2015This paper presents a new set of approaches for teleoperation of remotely operated vehicles (ROVs), or autonomous underwater vehicles (AUVs) with on-board cameras. We address the control allocation problem for underwater vehicles, i.e., how to best distribute the control forces so that the robot behaves as intuitively as possible based on the operator ...
Cong Dung Pham +2 more
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