Passive Gravity Balancing with a Self-Regulating Mechanism for Variable Payload

A Gravity Balancing Passive Exoskeleton for the Human Leg

A gravity balancing lower extremity exoskeleton is a simple mechanical device composed of rigid links, joints and springs, which is adjustable to the geometry and inertia of the leg of a human subject wearing it. This passive exoskeleton does not use any motors or controllers, yet can still unload the human leg joints of the gravity load over the full range of motion of the leg. The underlying ...

Balancing for Variable Players

Introduction Young-adults with cerebral palsy (CP) often experience a decrease in physical activity as they reach adolescence and consequently an increase in social isolation from their peers. This decrease in physical activity negatively impacts both their physical and social well being. The project CP Fit 'n' Fun aims to improve the physical fitness and social immersion of youth with CP by de...

Regulating Self-organizing Nanostructures via External Mechanism

A Higgs Mechanism for Gravity

In this paper we elaborate on the idea of an emergent spacetime which arises due to the dynamical breaking of diffeomorphism invariance in the early universe. In preparation for an explicit symmetry breaking scenario, we consider nonlinear realizations of the group of analytical diffeomorphisms which provide a unified description of spacetime structures. We find that gravitational fields, such ...

Automatic estimation of regularization parameter by active constraint balancing method for 3D inversion of gravity data

Gravity data inversion is one of the important steps in the interpretation of practical gravity data. The inversion result can be obtained by minimization of the Tikhonov objective function. The determination of an optimal regularization parameter is highly important in the gravity data inversion. In this work, an attempt was made to use the active constrain balancing (ACB) method to select the...