Locations optimization of multiple cable-drivers for an anti-wind disturbance system in large antenna

Abstract

Since the structural vibration deformation of a large antenna under wind disturbance leads to the pointing deterioration, an adaptive anti-wind disturbance system was presented by Liang et al. (Int. J. Antennas Propag., Article ID 2015341, 2019). To further improve the vibration suppression performance, this paper presents a locations-optimization algorithm of multiple cable-drivers for the anti-wind disturbance system. First, according to the spatial geometric relationship among the antenna structure, single slide track, four cables and drivers, the feasible domain of the drivers is determined. Next, the separate optimization method, and the joint optimization method for the locations of the four drivers are proposed, respectively. Finally, the simulation implementation of a 7.3 m antenna under various wind conditions is used to compare the joint optimization method and the separate optimization method.

Vibration reduction control by a cable actuation system for reflector antenna

“…For the 7.3 m antenna colored dark blue in Figure 1, the wind disturbance mainly excites two-order modes in the elevation and azimuth directions of the reflector (Liang et al, 2019(Liang et al, , 2020(Liang et al, , 2021). An adaptive anti-wind disturbance system that consists of a vibration monitoring and control system is designed for this antenna and is shown in Figure 1.…”

“…When the average wind speed is 10 m/s and the wind is blowing from the side of the 7.3 m antenna, the position of the drivers in Figure 3 can be optimized with the joint optimization method (Liang et al, 2021). The detailed numerical modeling method of the wind field is described in Liang et al (2019) and Liang et al (2020).…”

Dynamic characteristics and structural stability analysis of a large annular tensegrity structure with radial ribs

“…The antenna's aperture which is restricted by carrying capacities of vehicles and folding volume becomes larger. Deployable structures can be folded during launching and deployed to their full scale when working in orbit (Yang et al, 2016;Xiao et al, 2020;Han et al, 2020;Liang et al, 2020). Therefore, deployable antennas have effective solutions to solve the problems of the volume restrictions of designing antennas with large apertures (Zhang et al, 2014;Xie et al, 2019;Hollaway et al, 1991).…”