A Review of Strategies for Parabolic Antenna Control

Ahmed, Mohammed; Mohd Noor, Samsul Bahari B.; Mohd Khair B.VHassan; Che Soh, Azura Bt
May 2014
Australian Journal of Basic & Applied Sciences;May2014, Vol. 8 Issue 7, p135
Academic Journal
The parabolic dish antenna systems are directional antennas with large gains at high frequencies and are used for many applications. Operations of the antenna system are usually disrupted by disturbances such as wind, backlash, friction, saturation, errors due to measurements by sensors, the effect of gravity and movement in some applications. These antennas have to be always aligned at line of sight for effective and continuous operations and suitable controllers are used to achieve this aim. This article tries to look at the various control strategies used in such systems in order to achieve position control in the presence of both internal and external disturbances as well as to improve the system performance. The techniques surveyed were classified into: the linear, adaptive, predictive, computer, meta-heuristic, artificial neural networks and fuzzy logic methods. The task of developing new controllers with improved system performance for parabolic dish antennas is important because systems using such antennas are critical to technological development and their sizes, frequencies of operation depending where employed and applications keeps changing, and so also the pointing precision which is a function of the area of application.


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