Experimental Identification of Satellite Antenna Dynamics

Maani Miandoab, Ehsan; Zabihian, Ehsan; Najafi, Hossein

doi:10.22034/jssta.2021.275330.1014

Document Type : Original Article

Authors

¹ Department of Mechanical Engineering, University of Tehran, Tehran, Iran.

² College of Engineering, University of Tehran

https://doi.org/10.22034/jssta.2021.275330.1014

Abstract

In all types of satellites, communication systems are utilized for data transmission between satellite and ground stations. pointing the communication antennas to the ground is necessary for the correct mission transmission information. The vibration of the satellite antenna leads to deforming antenna pattern, creating noise and reducing connection quality. Moreover, working the attitude control actuators near the antenna's natural frequency leads to its resonance and large amplitude vibration in the antenna and satellite structure. Thus it is necessary to identify the satellite antenna dynamic behavior as natural frequency and damping ratio. In this paper, the satellite antenna is intended as a smart beam, based on the free vibration of clamped-free beam shape of satellite antenna and sensing its vibration by the piezoelectric sensor, its dynamic characteristic as damping and frequency is identified and verified by comparing the results with experimental ones. The considered mathematical model is very accurate and this model can be used to determine the dynamic behavior of the antenna in different satellite secondary structures.

Keywords

Satellite antenna# Piezoelectric sensor# Vibration frequency# System identification

20.1001.1.27834557.1400.1.1.1.4

Main Subjects

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Space Science, Technology and Applications

Experimental Identification of Satellite Antenna Dynamics

References

References

Volume 1, Issue 1 - Serial Number 1
September 2021
Pages 1-12

Experimental Identification of Satellite Antenna Dynamics

References

References

Volume 1, Issue 1 - Serial Number 1September 2021Pages 1-12

Volume 1, Issue 1 - Serial Number 1
September 2021
Pages 1-12