Frequency Transmission Control of Local Networked Control Systems Approach

 

O. Esquivel-Flores*¹, H. Benítez-Pérez²

 

¹ Universidad Nacional Autónoma de México Posgrado en Ciencia e Ingeniería de la Computación *oaefmcc@hotmail.com.

² Universidad Nacional Autónoma de México, Departamento de Ingeniería de Sistemas Computacionales y Automatización, Instituto de Investigación en Matemáticas Aplicadas y en Sistemas.

 

ABSTRACT

The use of Network Control Systems has been successful in the industry and therefore has opened several lines of research. Control systems over a communication network include two important considerations, control and scheduling. Co-design strategies are focused on maintaining adequate control performance and maximize the level of service. Network scheduling is the main objective to resolve because through a balanced data load is possible to maintain control performance in a desired level. This article reviews a scheduling strategy based on frequency transition modeled as a linear subsystem, this control reconfigure on line the sensors' periods. The case of study is the control of a prototype helicopter and by numerical simulations it shows the effect of changing the transmission frequency.

Keywords: distributed systems, transmission frequency, control.

 

RESUMEN

Actualmente los sistemas de control en red han sido utilizados ampliamente en la industria y han tomado gran interés en el campo de la investigación. Dos áreas de estudio son consideradas en los sistemas de control en red: el control y la planificación. Las estrategias de co-diseño se enfocan en mantener un nivel de control y maximizar al mismo tiempo el nivel de servicio del medio de comunicación. La planificación del medio de red es el principal objetivo a resolver dado que al balancear la carga de los datos que se transmiten se mantiene el desempeño de control en un nivel deseado. Este artículo revisa una estrategia de planificación basado en el cambio de frecuencias modelado como un subsistema lineal, tal control reconfigura en línea los periodos de muestreo de los sensores del sistema. El caso de estudio es el control de un prototipo de helicóptero y por medio de simulaciones numéricas se muestra el efecto del cambio de frecuencias de transmisión de datos.

 

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Acknowledgements

The financial support from grants PAPIIT-UNAM 103310, ICYTDF PICCO 10-53, and CONACYT (PhD grant) are especially appreciated.

 

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