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Open AccessJournal ArticleDOI

Optimal estimator model for human spatial orientation

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TLDR
A model is presented to predict human dynamic spatial orientation in response to multisensory stimuli and computer implementation of the model has shown agreement with several important qualitative characteristics of human spatial orientation.
Abstract
A model is being developed to predict pilot dynamic spatial orientation in response to multisensory stimuli Motion stimuli are first processed by dynamic models of the visual, vestibular, tactile, and proprioceptive sensors Central nervous system function is then modeled as a steady-state Kalman filter which blends information from the various sensors to form an estimate of spatial orientation Where necessary, this linear central estimator has been augmented with nonlinear elements to reflect more accurately some highly nonlinear human response characteristics Computer implementation of the model has shown agreement with several important qualitative characteristics of human spatial orientation, and it is felt that with further modification and additional experimental data the model can be improved and extended Possible means are described for extending the model to better represent the active pilot with varying skill and work load levels

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Journal ArticleDOI

An optimal control model for analyzing human postural balance

TL;DR: A human sensorimotor control model, compatible with previous work by others, was assembled that incorporates linearized equations and full-state feedback with provision for state estimation, and produces a control that reasonably matches experimental data.
Journal ArticleDOI

Interaction of vestibular, somatosensory and visual signals for postural control and motion perception under terrestrial and microgravity conditions—a conceptual model

TL;DR: It is recommended that future research under altered gravity conditions should be guided by models that include biomechanics, considerations of intersensory interaction and dynamic control mechanisms, and an integrative conceptual framework will be helpful for reaching a general understanding of spatially oriented behavior.
Journal ArticleDOI

A multisensory integration model of human stance control.

TL;DR: It is concluded, that the model is capable of studying and quantifying multisensory integration in human stance control and should be applied in the design and development of prostheses and orthoses and the diagnosis of neurological balance disorders.
Journal ArticleDOI

An adaptive model of sensory integration in a dynamic environment applied to human stance control.

TL;DR: The model results suggest that vestibular-related thresholds are the result of the processing of noisy sensory and motor output signals, and suggests that the environment postural orientation can not be estimated optimally, which causes sensory illusions.
Journal ArticleDOI

An optimal state estimation model of sensory integration in human postural balance

TL;DR: A model for human postural balance, combining state feedback control with optimal state estimation, which reproduces the general nature of postural motion as a function of sensory environment and is useful for predicting which sensors are most critical for balance, and how much they can deteriorate before posture becomes unstable.
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