Dynamic modelling and control for fully-steerable large reflector antenna considering rigid-flexible coupling

• Main Authors: Sulan Li, Hong Bao, Congsi Wang
• Format: Article
• Language: English
• Published: JVE International 2017-05-01
• Series: Journal of Vibroengineering
• Subjects: reflector antenna; dynamic model; flexible deformation; Lagrange equation; control
• Online Access: https://www.jvejournals.com/article/17438

As the size of reflector antenna increases, the influence of flexible deformation to the system dynamics is much more significant. The coupling between the flexible deformation and the rigid displacement needs to be considered. However, the traditional dynamic modelling and control method for large reflector antenna ignores this coupling. To overcome this problem, this paper proposes a dynamic method based on Lagrange Principle, and the corresponding control strategy is discussed. Finally, we take a 110 m diameter fully-steerable antenna as an example to carry out this method. All the results show that the method is stable and with high precision. It will also lay a solid foundation for the high-precision pointing of large reflector antenna.