CONTROL MOMENT GYROSCOPE GIMBAL ACTUATOR STUDY
Abstract
The purpose of this study is the determination of an optimal gimbal actuator for large double gimbal control moment gyros. The optimization study is divided into three distinct phases: torquers and transmissions, which together form the actuators, and controllers. The DC torquer and an epicyclic transmission are selected as optimal, on the basis of power, weight, size, reliability and performance. Pulse width modulation of a type designated as single channel is established as the optimal controller. To demonstrate the application of the optimal actuator configuration, a preliminary design layout was completed for mounting at one pivot of a CMG having an angular momentum of 1000 foot-pound-seconds. The design includes all necessary structure and a tachometer generator, weighs 23 pounds, consumes less than 45 watts at full torque and also fulfills all performance requirements. It has a threshold of 3% and a reliability of 0.9741 for one year and 0.9956 for two months while in operation.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1966
- Accession Number
- AD0801885
Entities
People
- D. Pool
- Hannah Varner
- J. Carnazza
- L. Morine
- T. O'connor