Analysis of the mechanical model corresponding to the hand-arm system.(Report)

1. INTRODUCTION

The hand-arm ensemble is a system with a high level complexity, inhomogeneous and continuous, having the viscous-elasticity properties in the muscles, bones and skin.

The dynamics characteristics, regarding the biodynamic model analysis need the mechanical properties identification, these are: the viscous-elastically and inertial properties of model, and they determinate in the typical conditions. For the arm-hand movement exists many factors that make reference of the behavior, for example, static and dynamic factors (Brammer et al., 1982), (Cristea et al., 2004).

2. THE MATHEMATICAL MODEL

The instantaneous position of the vibrant system, for any movement or moment, can be determinate function of the many independent parameters or dynamical coordinates; they named dynamical degrees of freedom. The mathematical model leads to dynamic equations equilibrium of vibrant model. For simplification real model of the hand-arm dynamics, it having distributed mass, this will be transformed into model with …