Perception And Control Of Simulated Self Motion
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Perception And Control Of Simulated Self Motion
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Author :
language : en
Publisher:
Release Date : 1987
Perception And Control Of Simulated Self Motion written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1987 with Motion study categories.
On The Perception Of Self Motion
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Author : Alessandro Nesti
language : en
Publisher:
Release Date : 2015
On The Perception Of Self Motion written by Alessandro Nesti and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015 with Motion perception (Vision) categories.
Everyday life requires humans to move through the environment, while completing crucial tasks such as retrieving nourishment, avoiding perils or controlling motor vehicles. Success in these tasks largely relies in a correct perception of self-motion, i.e. the continuous estimation of one's body position and its derivatives with respect to the world. The processes underlying self-motion perception have fascinated neuroscientists for more than a century and large bodies of neural, behavioural and physiological studies have been conducted to discover how the central nervous system integrates available sensory information to create an internal representation of the physical motion. The goal of this PhD thesis is to extend current knowledge on self-motion perception by focusing on conditions that closely resemble typical aspects of everyday life. In the works conducted within this thesis, I isolate different components typical of everyday life motion and employ psychophysical methodologies to systematically investigate their effect on human self-motion sensitivity. Particular attention is dedicated to the human ability to discriminate between motions of different intensity. How this is achieved has been a fundamental question in the study of perception since the seminal works of Weber and Fechner. When tested over wide ranges of rotations and translations, participants' sensitivity (i.e. their ability to detect motion changes) is found to decrease with increasing motion intensities, revealing a nonlinearity in the perception of self-motion that is not present at the level of ocular reflexes or in neural responses of sensory afferents. The relationship between the stimulus intensity and the smallest intensity change perceivable by the participants can be mathematically described by a power law, regardless on the sensory modality investigated (visual or inertial) and on whether visual and inertial cues were presented alone or congruently combined, such as during natural movements. Individual perceptual law parameters were fit based on experimental data for upward and downward translations and yaw rotations based on visual-only, inertial-only and combined visual-inertial motion cues. Besides wide ranges of motion intensities, everyday life scenarios also provide complex motion patterns involving combinations of rotational and translational motion, visual and inertial sensory cues and physical and mental workload. The question of how different combinations of these factors affect motion sensitivity was experimentally addressed within the framework of driving simulation and revealed that sensitivity might strongly decrease in more realistic conditions, where participants do not only focus on perceiving a 'simple' motion stimulus (e.g. a sinusoidal profile at a specific frequency) but are, instead, actively engaged in a dynamic driving simulation. Applied benefits of the present thesis include advances in the field of vehicle motion simulation, where knowledge on human self-motion perception supports the development of state-of-the-art algorithms to control simulator motion. This allows for reproducing, within a safe and controlled environment, driving or flying experiences that are perceptually realistic to the user. Furthermore, the present work will guide future research into the neural basis of perception and action.
Perception And Control Of Self Motion
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Author : Rik Warren
language : en
Publisher: Psychology Press
Release Date : 2014-01-14
Perception And Control Of Self Motion written by Rik Warren and has been published by Psychology Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014-01-14 with Psychology categories.
This book presents studies of self-motion by an international group of basic and applied researchers including biologists, psychologists, comparative physiologists, kinesiologists, aerospace and control engineers, physicians, and physicists. Academia is well represented and accounts for most of the applied research offered. Basic theoretical research is further represented by private research companies and also by government laboratories on both sides of the Atlantic. Researchers and students of biology, psychology, physiology, kinesiology, engineering, and physics who have an interest in self-motion -- whether it be underwater, in space, or on solid ground -- will find this volume of interest. This book presents studies of self-motion by an international group of basic and applied researchers including biologists, psychologists, comparative physiologists, kinesiologists, aerospace and control engineers, physicians, and physicists. Academia is well represented and accounts for most of the applied research offered. Basic theoretical research is further represented by private research companies and also by government laboratories on both sides of the Atlantic. Researchers and students of biology, psychology, physiology, kinesiology, engineering, and physics who have an interest in self-motion -- whether it be underwater, in space, or on solid ground -- will find this volume of interest.
Perception And Control Pr
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Author :
language : en
Publisher:
Release Date : 2014
Perception And Control Pr written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014 with Perceptual-motor processes categories.
The Effects Of Specific Force On Self Motion Perception In A Simulation Environment
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Author : Bruno Jorge Correia Grácio
language : en
Publisher:
Release Date : 2013
The Effects Of Specific Force On Self Motion Perception In A Simulation Environment written by Bruno Jorge Correia Grácio and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013 with categories.
Rigidity Perception During Simulated Self Motion
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Author : Cassandra Rogers
language : en
Publisher:
Release Date : 2010
Rigidity Perception During Simulated Self Motion written by Cassandra Rogers and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010 with Motion perception (Vision) categories.
A Cybernetic Approach To Self Motion Perception
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Author : Florian Soyka
language : en
Publisher:
Release Date : 2013
A Cybernetic Approach To Self Motion Perception written by Florian Soyka and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013 with categories.
Self-motion describes the motion of our body through the environment and is an essential part of our everyday life. The aim of this thesis is to improve our understanding of how humans perceive self-motion, mainly focusing on the role of the vestibular system. Following a cybernetic approach, this is achieved by systematically gathering psychophysical data and then describing it based on mathematical models of the vestibular sensors. Three studies were performed investigating perceptual thresholds for translational and rotational motions and reaction times to self-motion stimuli. Based on these studies, a model is introduced which is able to describe thresholds for arbitrary motion stimuli varying in duration and acceleration profile shape. This constitutes a significant addition to the existing literature since previous models only took into account the effect of stimulus duration, neglecting the actual time course of the acceleration profile. In the first and second study model parameters were identified based on measurements of direction discrimination thresholds for translational and rotational motions. These models were used in the third study to successfully predict differences in reaction times between varying motion stimuli proving the validity of the modeling approach. This work can allow for optimizing motion simulator control algorithms based on self-motion perception models and developing perception based diagnostics for patients suffering from vestibular disorders.
Optical Flow And Texture Variables Useful In Simulating Self Motion Ii
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Author : Dean H. Owen
language : en
Publisher:
Release Date : 1982
Optical Flow And Texture Variables Useful In Simulating Self Motion Ii written by Dean H. Owen and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1982 with categories.
This report outlines a program of research applying ecological optics to the study of visual information useful for detecting and guiding self motion during flight. Techniques are presented for isolating optical sources of information by controlling simulated flight path and speed variables in conjunction with ground surface texture variables. Problems encountered in the design of experiments using higher-order ratios exhibiting constrained linkages are discussed, and several solutions are suggested. A case is made for the necessity of considering the entire perception-(control) action cycle in the study of self-motion sensitivity, and implications of ecological optics experiments for the understanding of 'smart' information-specifying visual system mechanisms are discussed. Three experiments are presented testing the usefulness of optical variables and invariants for detecting changes in speed and altitude. Our findings to date provide a basis for the development of tests to evaluate candidates for flight training, the simulators with which pilots are trained, and improvement in sensitivity with training. In addition, our approach provides a sound empirical foundation from which to begin interactive experiments in which pilots control, rather than simply react to, the variables and invariants of optical stimulation.
Scientific And Technical Aerospace Reports
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Author :
language : en
Publisher:
Release Date : 1994
Scientific And Technical Aerospace Reports written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with Aeronautics categories.
Handbook Of Virtual Environments
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Author : Kelly S. Hale
language : en
Publisher: CRC Press
Release Date : 2002-01-01
Handbook Of Virtual Environments written by Kelly S. Hale and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002-01-01 with Technology & Engineering categories.
This Handbook, with contributions from leading experts in the field, provides a comprehensive, state-of-the-art account of virtual environments (VE). It serves as an invaluable source of reference for practitioners, researchers, and students in this rapidly evolving discipline. It also provides practitioners with a reference source to guide