Satellite antennas are a key part of modern communication systems, where precise alignment is essential to prevent signal loss. Since they are often implemented as twoaxis mechanisms similar to robotic manipulators, we have developed a mathematical model to analyze their motion, which, unlike idealized rigid models, also takes into account the influence of the flexibility of the mounting. The kinematics of the system is described by the Denavit-Hartenberg formulation, on the basis of which the equations of motion of the extended dynamic model were derived using Lagrangian mechanics in the Python programming language. A numerical modal analysis was performed with the developed model, which identified the natural frequencies and oscillation modes of the system. The analysis allows for a better understanding of the dynamic properties and represents the basis for simulating trajectories and planning the control of the antenna system.
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