Citation
Abstract
The subreflector of the high-e–ciency (HEF) antenna moves in three axes, while the subreflector controller supervises these movements. The precision of subreflector response to the controller commands is essential to maintaining the antennapointing precision. This article presents the development of the control system model of the HEF antenna subreflector. It includes the dynamics of the open-loop (or rate-loop) system, the development of the controller, and the simulations of the closed-loop performance. The analysis shows that the closed-loop dynamics, such as settling time, overshoot, and bandwidth, are comparable to the antenna closed-loop dynamics; thus, they are able to meet the pointing requirements.
Keywords
antenna
radio telescope
pointing
control systems
Details
- Volume
- 42-143
- Published
- November 15, 2000
- Pages
- 1–14
- File Size
- 452.8 KB