Citation
Abstract
Gearboxes and gears are part of the DSN antenna drives. The drives show backlash at the gearboxes and at elevation bull gears due to a small gap between the gear teeth. Left uncorrected, backlash deteriorates the antenna pointing precision. Implementing two identical drives imposes two nonidentical torques and produces a torque difference (also known as torque bias or counter-torque) that eliminates backlash. The electronic circuit at the axis drive generates the torque-bias profile. The performance of the existing circuit is analyzed, and a modiffed circuit is designed that improves the antenna dynamics under external disturbances.
Keywords
antennas
radio telescopes
drivers
tracking
backlash
Details
- Volume
- 42-139
- Published
- November 15, 1999
- Pages
- 1–17
- File Size
- 636.2 KB