Vinculación de un sistema automatizado de control a una máquina elíptica para mejorar las funciones motoras de las personas miembros de la AFAPECH

Abstract

The objective of this work was to link an automated control system to an elliptical machine to improve the motor functions of the members of AFAPECH (Asociación de familiares de Personas Excepcionales de Chimborazo). Through a documental research, information was obtained about control parameters such as speed, time and positioning in the rehabilitation machines. The applied research allowed the structural repowering of the elliptical machine by implementing the CAD-SolidWorks tool, was also made to evaluate stress parameters, displacements and unit deformations of the materials of the mechanism; determining that the application of a force of 588.6 N will not affect the structure, since the elastic limit generated by this force is less than the critical elastic limit (3.5e+8Pa) of cold rolled carbon steel. Also, both the maximum displacement and deformation coefficient that the machine could suffer is 0.3mm in the plastic part of the anti-slip pedal and 5.48e-4, respectively, being negligible values within the analysis. A Raspberry-Pi3 and an Arduino Uno with C++ programming language were used in the QT Creator application for the graphical interface that controls the components of the machine through a touch screen. Lastly, a postural analysis was performed by means of the lower body protocol using the ISEM system considering parameters such as: pelvis, hip, knee and ankle. It is concluded that the motion capture graph in a disabled person is not constant due to the instability of the movements. It is recommended in future research to implement adaptations in the elements that guarantee the comfort of the person.