Abstract:
A system for determining the mechanical properties of the human arm during unconstrained posture and movement is described. An airjet perturbation device is attached to t...Show MoreMetadata
Abstract:
A system for determining the mechanical properties of the human arm during unconstrained posture and movement is described. An airjet perturbation device is attached to the wrist with a special cuff, providing high-frequency stochastic perturbations in three orthogonal directions. The airjet operations as a fluidic flip-flop utilizing the Coanda effect. The design greatly reduces the mass of mechanical moving parts and enhances the frequency bandwidth dramatically. This airjet is intrinsically a bistable device that can generate arbitrary binary force sequences, such as pseudorandom binary sequences, colored white noise, and Walsh functions. The force transmissibility is identified. Cuff design and data acquisition are discussed.<>
Published in: IEEE Transactions on Biomedical Engineering ( Volume: 38, Issue: 11, November 1991)
DOI: 10.1109/10.99075