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DEVELOPMENT OF AN AUTOMATED SYSTEM FOR MANEUVERING PARABOLIC DISH ANTENNAS USED IN SATELLITE COMUNICATION

The automation in all its aspects has become widespread and promises to represent the future for information technology, according to some researchers. This paper aims to present and discuss the results from the development of an automated system for maneuvering of the parabolic reflector antennas of a satellite communication. This work automates the key steps involved in the manual maneuvering of an antenna dish. Based on procedures for the manual maneuvering a satellite dish, was proposed an architecture that employs hardware solutions and software. It was added to the platform a GPS antenna to monitor the spatial location, and a digital receiver, which provides the value for the carrier-to-noise ratio, C/N. The main focus of this work was to design and develop in Java, a Control System Antenna Maneuvering, 3SA that can process the information of the spatial position of the antenna, generating a reference signal for a servo capable of processing the C/N and making a fine adjustment of the position of the antenna in order to improve signal reception. The user can select the desired satellite and monitor the process of automatic annotation, through a set of user-friendly graphical interfaces. In the context of this work, we found that even if the antenna is in a desired position, the C/N ratios should be above a minimum value for a good reception. Consequently, it was necessary to design a control system to fine-tuning the antenna position. Our approach in this case was to use a fuzzy controller which employed 63 rules, generated according to rules of thumb used in the process of manual maneuvering a satellite dish. This solution allowed for better placement of the antenna and therefore a C/N ratio above the minimum for good reception. The experimental results showed a perfect match for our approach to automate the key steps manual maneuvering an antenna dish.