Journal of Engineering and Applied Sciences

Year: 2019
Volume: 14
Issue: 16
Page No. 5657 - 5664

Antenna Azimuth Position Control System using Model Reference Adaptive Control Method Gradient Approach and Stability Approach

Authors : Aveen Uthman

Abstract: Differential and power amplifiers are the main components of the antenna azimuth position control system. They played an important role in operating the overall system. This study utilized two approaches namely, the gradient and Lyapunov approaches for tuning the differential amplifier gains adaptively by using the Model Reference Adaptive Controller (MRAC). The design process of such controller is demonstrated. Preferred gain value is selected as a reference model. Although, gradient approach shows staggering system response in the overall system’s stability, this leads to the introduction of Lyapunov approach to overcome the instability. The two approaches are compared for performance analysis and it was noted that gradual increment in the adaptive gain resulted to improvement in stability for both approaches at some range after which the system response became instable for gradient approach. The rate of improvement is higher in Lyapunov approach with adaptive gain of 450 as against that of the gradient approach with adaption gain of 22. Moreover, Lyapunov settling time was found to be less than that of the MRAC. The gradient approach proved to be slow in system response when the system’s input was increased. Moreover, for an adaptive gain of 22 and 450 the best system performance was achieved for gradient and Lyapunov approaches, respectively while the input unit step was maintained as 1. Finally, an improvement on the system response in term of stability and fastness was found in the Lyapunov approach as against the gradient approach.

How to cite this article:

Aveen Uthman , 2019. Antenna Azimuth Position Control System using Model Reference Adaptive Control Method Gradient Approach and Stability Approach. Journal of Engineering and Applied Sciences, 14: 5657-5664.

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