®®®® SIIA Público

Título del libro: Proceedings: Iecon 2018 - 44th Annual Conference Of The Ieee Industrial Electronics Society
Título del capítulo: Reduction of angular position error of a machine vision system using the digital controller LM629

Autores UNAM:
FABIAN NATANAEL MURRIETA RICO;
Autores externos:

Idioma:

Año de publicación:
2018
Palabras clave:

Computer vision; Controllers; DC motors; Errors; Industrial electronics; Angular positions; Closed loop configuration; Digital controllers; Laser scanning; Machine vision systems; Technical vision systems (TVS); Trapezoidal velocity; Trapezoidal velocity profile; Electric machine control


Resumen:

A new approach to position the Technical Vision System (TVS) laser ray, which determines the 3D coordinates of any objet under observation in the TVS Field-of-View (FOV), using the Digital Controller LM629 is proposed. This approach reduces significantly the angular position error by at least 82.97 per cent, compared to the previous implementation of a proportional algorithm in closed-loop configuration, using directly a single microcontroller. Present paper identifies the behavior of the DC motor shaft, which represents the main actuator of the TVS Positioning Laser (PL), adjusting an internal trapezoidal velocity profile, generated as the control signal for the DC motor. The reference value for the DC motor actual angular position is computed, using the Digital Controller LM629, which also tracks this actual angular position. The methodology of the new approach is developed in accordance with theoretical concepts. In addition, experimental results show the comparison between the previous implementation and this new approach. © 2018 IEEE.


Entidades citadas de la UNAM: