A Bearing Cartridge Assembly for Longterm Performance of Momentum/Reaction Wheels used in Spacecraft
Journal Title: Tribology in Industry - Year 2014, Vol 36, Issue 1
Abstract
Momentum/reaction wheels are used in a spacecraft for the attitude control. They are used for the real time control of spacecraft attitude towards the desired direction as required by the mission. These are one of the few systems of a spacecraft which need to work continuously from the beginning to end of the mission. Thus the life of a space mission depends largely on the performance of the attitude control wheels. The common mode of failure in momentum/reaction wheel is mechanical and mostly related to the bearing and lubrication. This paper presents the design and development of a bearing cartridge assembly including the lubrication system for long-term performance of spacecraft attitude control wheels. The results of both theoretical and experimental analysis are presented. The experimental study of the assembly shows that it can perform continuously for a period of 30 years with reduced frictional losses.
Authors and Affiliations
K. Sathyan , H. Y. Hsu , S. H. Lee , K. Gopinath
Keywords
Related Articles
- EP ID EP131407
- DOI -
- Views 83
- Downloads 0
Simulation of Contact Area and Pressure Dependence of Initial Surface Roughness for Cermet-Coated Discs Used in Disc Brakes
Friction, wear, and emission performance strongly depend on the contact pressure and area at the interface of the pad and disc. The contact situation at the pad-to-disc interface can be explained by the formation and des...
Tribological Considerations of Cutting Fluids in Machining Environment: A Review
The paper presents a review to highlight the tribological aspects of cutting fluids in machining environment. In this study, different machining processes viz. turning, grinding, drilling and milling have been considered...
Effect of Heat Treatment on Wear behavior of Hybrid Aluminum Metal Matrix Composites
The focus of the paper is the wear behavior of hybrid aluminum metal matrix composites. The main objective of the investigation is to conduct the wear test at room temperature for both the as-cast and age hardening condi...
Application of Contemporary Information Technologies in Nanotribometry
Relevant and timely information is of crucial importance in scientific investigations and understanding of the phenomena should be precise and explicit. Among other, phases of scientific investigations comprise data acqu...
Tribological Coatings for Aerospace Applications and the Case of Wc-Co Plasma Spray Coatings
Friction and wear requirements in aerospace systems are dictated by life limiting problems. One challenge is the broad range of contact stresses and sliding speeds for various movable devices. Another challenge is the ex...