The search for the ultimate gimbalThe need for higher accuracy in pointing systems continues to grow. Fundamental limitations are inherent in the components used for gimbals. This paper discusses some developments which are expected to make it possible to achieve higher accuracy and stability. Ironless armature torque motors are described which exhibit zero hysteresis and no preferred position. Non-contacting signal and power transfer devices to eliminate friction and cable-wrap torques have also been developed. Magnetic bearings can eliminate the last remaining source of erratic frictional effects. Controllers using Kalman estimation techniques can accommodate constant residual effects.
Document ID
19790061383
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Studer, P. A. (NASA Goddard Space Flight Center Greenbelt, Md., United States)