Antenna Tracker Design With A Discrete Lyapunov Stability Based Controller For Mini Unmanned Aerial Vehicles

Mehmet Iscan, Ali Ihsan Tas, Berkem Vural, Ali Burak Ozden, Cuneyt Yilmaz
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引用次数: 3

Abstract

– Communication systems have recently been very important in mini unmanned aerial vehicles (UAV), which include many research subjects. Directional antennas are generally used in communication systems, and they should continuously and efficiently follow the UAVs with minimal errors. For this purpose, an “Antenna Tracker” system, which is capable of real-time autonomous orientation based on GPS data from the UAV, was designed. In the beginning, the system’s 3-dimensional solid model was obtained in SOLIDWORKS TM and its dynamical model was made in MATLAB / Simulink TM environment. For controlling the system, a discrete-time model-based computed torque proportional controller, which is the state-of-the-art innovation in this study, was designed in two axes, and then its simulation studies were conducted on the STM32 board. The simulation studies showed that controlling the pan and tilt axes is sufficient for effective tracking, and the presented antenna tracker system is suitable for use in mobile ground control stations (GCS). By using a short sampling time for the controller, stable and precise antenna tracking is accomplished for a given reference path. When a 0.5 Hz sinusoidal reference signal input which is the maximum speed for any antenna tracker was used as a sample reference track, ±0.3- and ±0.6-degrees position error of pan and tilt angles were obtained, respectively. The controller can easily satisfy a smooth tracking operation with high accuracy.
基于离散Lyapunov稳定控制器的小型无人机天线跟踪器设计
-通信系统在微型无人机(UAV)中占有非常重要的地位,其中包括许多研究课题。定向天线是通信系统中常用的一种天线,它需要在最小误差下连续高效地跟踪无人机。为此,设计了一种“天线跟踪器”系统,该系统能够基于无人机的GPS数据进行实时自主定位。首先在SOLIDWORKS TM中获得了系统的三维实体模型,并在MATLAB / Simulink TM环境下建立了系统的动力学模型。为了对系统进行控制,设计了本研究最先进的基于离散时间模型的计算转矩比例控制器,并在STM32板上进行了仿真研究。仿真研究表明,控制平移轴和倾斜轴就足以实现有效的跟踪,所提出的天线跟踪系统适用于移动地面控制站。通过对控制器使用较短的采样时间,实现了对给定参考路径稳定、精确的天线跟踪。以任意天线跟踪器的最大速度为0.5 Hz的正弦参考信号输入作为样本参考轨迹,得到平移角和倾斜角的位置误差分别为±0.3°和±0.6°。该控制器可以轻松满足高精度的平稳跟踪操作。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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