Citation
Abstract
The article presents the development of the subreflector model of a beamwaveguide antenna, starting from the mechanical hardware, proceeding into the rate-loop system, and finally into the position-loop system. The rate-loop model and the position-loop model simulation results were verified with the field data. The analysis showed that the subreflector displays a nonlinear behavior when excited by larger step offsets (2 mm or larger) and that its bandwidth is identical to the bandwidth of the 70-m antenna subreflector. In order to improve the subreflector dynamics, we propose to increase motor power (e.g., replace a single motor with three motors) or to modify the controller algorithm by adding a feedforward loop and a command preprocessor.
Details
- Volume
- 42-153
- Published
- May 15, 2003
- Pages
- 1–15
- File Size
- 387.9 KB