Abstract
Recently, data traffic for satellite communications is increasing rapidly, due to the various new purposes besides the conventional voice phone and facsimile. For the reason, it is necessary to realize high frequency communications, which is assured by high accuracy of tracking control of an antenna. This paper aims at the accuracy improvement of conventional tracking antennas by introducing H-infinity control. In this paper, the basic characteristics of tracking antenna are investigated by experiments and the model of the antenna for controller design is established. Based on the model, a H-infinity controller is designed and implemented to the antenna. Experimental results show that the tracking accuracy can be improved to ±0.25 [deg], which is four times higher than that by the conventional controller.
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