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This document presents a mathematical and experimental analysis by the Lagrange equations and with a electrogoniometer, which allows us to obtain the trajectories realized by the knee, by the angular displacing between: hip, knee and ankle; with this and applying mathematical concepts, it is possible to determine the torque applied to the knee while getting up.
In recent decades wind energy has gained great prominence in various parts of the world, resulting in the emergence of new technologies to improve its efficiency. Thus, this paper presents a technique for maximizing the power extracted from the wind by a variable speed wind turbine through measurements of voltage and current at the three-phase rectifier terminals, establishing its rotor speed control...
This paper provides statistical analysis of frequency response characteristic of the Irish Electric Power System as function of increasing wind power penetration. This analysis is based on 3-year (2007-2009) record data of unit trips at different conditions of the system including variation of wind generation. The analysis is carried out in terms of dynamic stiffness assessment and prediction of initial...
We here mainly investigate the mechanical effect of metal electrodes, such as mass effect and shear stiffness effect, and effects of viscosity and conductivity on the resonance frequency, capacitance ratio, and quality factor. We can finally find how those work to the electrical parameters with dissipation. And we have calculated the frequency for different piezoelectric materials with gold or silver...
For robotic manipulation tasks in uncertain environments, good force control can provide significant benefits. The design of force or torque controlled actuators typically revolves around developing the best possible software control strategy. However, the passive dynamics of the mechanical system, including inertia, stiffness, damping and torque limits, often impose performance limitations that cannot...
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