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Changing lanes: inertial cues and explicit path information facilitate steering performance when visual feedback is removed
(2007)Experimental Brain ResearchCan driver steering behaviors, such as a lane change, be executed without visual feedback? In a recent study with a fixed-base driving simulator, drivers failed to execute the return phase of a lane change when steering without vision, resulting in systematic final heading errors biased in the direction of the lane change. Here we challenge the generality of that finding. Suppose that, when asked to perform a lane (position) change, drivers ...Journal Article -
Magnetic Bearing Measurement Configurations and Associated Robustness and Performance Limitations
(2002)Journal of Dynamic Systems, Measurement, and ControlWe obtain bounds on achievable sensitivity and complementary sensitivity reduction for a magnetic bearing system in three measurement configurations. We use the sensitivity reduction bounds to deduce achievable robustness and performance limits for each system con- figuration. We then show how these limits vary with varying magnetic bearing physical dimensions and other parameter values as well as varying closed-loop system bandwidth and ...Journal Article -
Aeromaneuvering in the Martian Atmosphere: Simulation-Based Analyses
(2000)Journal of Spacecraft and RocketsJournal Article -
Control of a III-V MOCVD Process using Ultraviolet Absorption and Ultrasonic Concentration Monitoring
(2001)IEEE Transactions on Control Systems TechnologyMetalorganic chemical vapor deposition (MOCVD) is a key technology for the growth of compound semiconductors. This process has traditionally lacked real-time growth monitoring and control, which limits the precise reproducibility needed for high performance devices. Two complementary control approaches for the MOCVD process are investigated experimentally. The first is a feedforward disturbance rejection strategy using ultrasonic ...Journal Article -
Control of Deep Space Formation Flying Spacecraft; Relative Sensing and Switched Information
(2005)Journal of Guidance, Control, and DynamicsSpacecraft formations in deep space can be specified in terms of the relative spacecraft positions and absolute spacecraft orientations. Accurate absolute position measurements are not available and a formation control design approach, based on relative position information, is presented. This approach exploits the redundancy inherent in a relative position specification to develop a family of equivalent control topologies for optimal ...Journal Article -
Design of Distributed Decentralized Estimators for Formations with Fixed and Stochastic Communication Topologies
(2009)AutomaticaThis paper proposes a solution to the problem of synthesizing distributed decentralized estimators for a formation of agents. The collected dynamics of the formation are modeled by a discrete LTI system. In the considered estimation structure each agent of the formation carries an estimate of the entire formation state. Agents of the formation can communicate information between each other through unidirectional links modeled with a ...Journal Article -
Transient disruption of M1 during response planning impairs subsequent offline consolidation
(2009)Experimental Brain ResearchTranscranial magnetic stimulation (TMS) was used to probe the involvement of the left primary motor cortex (M1) in the consolidation of a sequencing skill. In particular we asked: (1) if M1 is involved in consolidation of planning processes prior to response execution (2) whether movement preparation and movement execution can undergo consolidation independently and (3) whether sequence consolidation can occur in a stimulus specific manner. ...Journal Article -
Neural Substrates of Contextual Interference during Motor Learning Support a Model of Active Preparation
(2007)Journal of Cognitive NeuroscienceWhen individuals acquire new skills, initial performance is typically better and tasks are judged to be easier when the tasks are segregated and practiced by block, compared to when different tasks are randomly intermixed in practice. However, subsequent skill retention is better for a randomly practiced group, an effect known as contextual interference (CI). The present study examined the neural substrates of CI using functional magnetic ...Journal Article -
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Integración por cuantificación de sistemas stiff
(2007)Revista iberoamericana de automática e informática industrialEste artículo presenta un nuevo método de integración numérica de ecuaciones diferenciales ordinarias basado en la cuantificación de las variables de estado. Utilizando conceptos de integración implícita, el nuevo método denominado BQSS (Backward Quantized State Systems) permite integrar sistemas stiff de manera eficiente. Siendo el primer método de cuantificación para sistemas stiff, BQSS es en sí un método explícito, por lo que la ...Journal Article