James E Hubbard Jr.'s Books

A Modal Approach to the Space-Time Dynamics of Cognitive Biomarkers

By: Tristan D. Griffith,James E. Hubbard Jr.,Mark J. Balas

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A Modal Approach to the Space-Time Dynamics of Cognitive Biomarkers

By: Tristan D. Griffith,James E. Hubbard Jr.,Mark J. Balas

This book develops and details a rigorous, canonical modeling approach for analyzing spatio-temporal brain wave dynamics. The nonlinear, nonstationary behavior of brain wave measures and general uncertainty associated with the brain makes it difficult to apply modern system identification techniques to such systems. While there is a substantial amount of literature on the use of stationary analyses for brain waves, relatively less work has considered real-time estimation and imaging of brain waves from noninvasive measurements. This book addresses the issue of modeling and imaging brain waves and biomarkers generally, treating the nonlinear and nonstationary dynamics in near real-time. Using a modal state-space formulation leads to intuitive, physically significant models which are used for analysis and diagnosis. A Modal Approach to the Space-Time Dynamics of Cognitive Biomarkers provides a much-needed reference for practicing researchers in biomarker modeling leveraging the lens of engineering dynamics.

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Page Count

142

Publisher

Springer Nature

Published Date

ISBN 10

3031235290

ISBN 13

9783031235290

Flight Dynamics and System Identification for Modern Feedback Control

Avian-Inspired Robots

By: Jared A Grauer,James E Hubbard Jr.

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Flight Dynamics and System Identification for Modern Feedback Control

Avian-Inspired Robots

By: Jared A Grauer,James E Hubbard Jr.

Unmanned air vehicles are becoming increasingly popular alternatives for private applications which include, but are not limited to, fire fighting, search and rescue, atmospheric data collection, and crop surveys, to name a few. Among these vehicles are avian-inspired, flapping-wing designs, which are safe to operate near humans and are required to carry payloads while achieving manoeuverability and agility in low speed flight. Conventional methods and tools fall short of achieving the desired performance metrics and requirements of such craft. Flight dynamics and system identification for modern feedback control provides an in-depth study of the difficulties associated with achieving controlled performance in flapping-wing, avian-inspired flight, and a new model paradigm is derived using analytical and experimental methods, with which a controls designer may then apply familiar tools. This title consists of eight chapters and covers flapping-wing aircraft and flight dynamics, before looking at nonlinear, multibody modelling as well as flight testing and instrumentation. Later chapters examine system identification from flight test data, feedback control and linearization. - Presents experimental flight data for validation and verification of modelled dynamics, thus illustrating the deficiencies and difficulties associated with modelling flapping-wing flight - Derives a new flight dynamics model needed to model avian-inspired vehicles, based on nonlinear multibody dynamics - Extracts aerodynamic models of flapping flight from experimental flight data and system identification techniques

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Page Count

161

Publisher

Elsevier

Published Date

ISBN 10

085709467X

ISBN 13

9780857094674

Modern Flexible Multi-Body Dynamics Modeling Methodology for Flapping Wing Vehicles

By: Cornelia Altenbuchner,James E Hubbard Jr.

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Modern Flexible Multi-Body Dynamics Modeling Methodology for Flapping Wing Vehicles

By: Cornelia Altenbuchner,James E Hubbard Jr.

Modern Flexible Multi-Body Dynamics Modeling Methodology for Flapping Wing Vehicles presents research on the implementation of a flexible multi-body dynamic representation of a flapping wing ornithopter that considers aero-elasticity. This effort brings advances in the understanding of flapping wing flight physics and dynamics that ultimately leads to an improvement in the performance of such flight vehicles, thus reaching their high performance potential. In using this model, it is necessary to reduce body accelerations and forces of an ornithopter vehicle, as well as to improve the aerodynamic performance and enhance flight kinematics and forces which are the design optimization objectives. This book is a useful reference for postgraduates in mechanical engineering and related areas, as well as researchers in the field of multibody dynamics. - Uses Lagrange equations of motion in terms of a generalized coordinate vector of the rigid and flexible bodies in order to model the flexible multi-body system - Provides flight verification data and flight physics of highly flexible ornithoptic vehicles - Includes an online companion site with files/codes used in application examples

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Page Count

200

Publisher

Academic Press

Published Date

ISBN 10

0128141379

ISBN 13

9780128141373

Spatial Filtering for the Control of Smart Structures

An Introduction

By: James E. Hubbard

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Spatial Filtering for the Control of Smart Structures

An Introduction

By: James E. Hubbard

What follows is my personal perspective on early events that played a signi?cant role in the formation of the ?eld now known as Smart Structures. It is by no means meant to be all inclusive or de?nitive in any way, but merely an account of personal experiences that ultimately lead to the development of the material contained and presented herein. On March 23, 1983 then President Ronald Reagan announced his intentions to develop a new system to reduce the threat of nuclear attack and end the strategy of mutual deterrence in an address to the nation entitled, Address to the Nation on Defense and National Security. The system he proposed became known as “Star Wars,” after the popular movie, because it was meant to provide a protective shield over the nation from space. His speech mobilized the entire nation on a research and development path toward this end. Investigations were conducted into new areas such as space based radar, large aperture antennae and large ?exible mirror concepts. These proposed systems r- resented an entirely new class of structures that proved to provide new challenges in materials, structures, control systems and modeling. For example antennae needed to monitor large areas of real estate in the continental United States required ap- tures on the order of 100 m.

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Page Count

217

Publisher

Springer Science & Business Media

Published Date

ISBN 10

3642038042

ISBN 13

9783642038044

Book's by James E Hubbard Jr.

A Modal Approach to the Space-Time Dynamics of Cognitive Biomarkers

A Modal Approach to the Space-Time Dynamics of Cognitive Biomarkers

Flight Dynamics and System Identification for Modern Feedback Control

Flight Dynamics and System Identification for Modern Feedback Control

Modern Flexible Multi-Body Dynamics Modeling Methodology for Flapping Wing Vehicles

Modern Flexible Multi-Body Dynamics Modeling Methodology for Flapping Wing Vehicles

Spatial Filtering for the Control of Smart Structures

Spatial Filtering for the Control of Smart Structures

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