A new experimental ground vehicle with hybrid control and hybrid vision sensor

 

J. M. Rendón–Mancha*¹, G. Sanahuja², P. Castillo², R. Lozano²

 

¹ Facultad de Ciencias, UAEM,Cuernavaca, México. *E–mail: rendon@uaem.mx

² Heudiasyc Laboratory, UMR CNRS 6599, Université de Technologie de Compiègne, Compiègne, France.

 

ABSTRACT

This paper presents a new hybrid control algorithm based on saturation functions and its real–time application to a ground vehicle. The hybrid control is developed from a nonlinear continuous control law and the objective is to obtain the optimal sampling period T to apply the controller in real experiences. The stability analysis was made in discrete time. The experimental platform is composed of a remote control toy car and a vision system. The vision system is built using a simple webcam and a diode laser. This system is fast, accurate, inexpensive and easy to implement. Simulations and experiments show the stability and robustness of the closed–loop system. The proposed control law performance is compared with a linear control algorithm.

Keywords: Nonlinear control, saturation functions, computer vision, experimental platform, laser.

 

RESUMEN

Este artículo presenta un nuevo algoritmo de control híbrido basado en funciones de saturación y su implementación en tiempo real en un vehículo terrestre. El control híbrido fue desarrollado a partir de una ley de control continua no lineal y el objetivo es obtener el período de muestreo óptimo T para aplicar el controlador en experimentos. La plataforma experimental se compone de un carro de juguete a control remoto y de un sistema de visión. El sistema de visión se construye usando una webcam y un diodo láser. El sistema es rápido, preciso, barato y fácil de implementar. Las simulaciones y los experimentos muestran la estabilidad y la robustez del sistema de lazo cerrado. Se realiza una comparación del desempeño de la ley de control propuesta con la de un algoritmo de control lineal.

 

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