Accession Number:

AD0600182

Title:

THE TORSIONAL DAMPING CAPACITY OF A THIN WIRE AND ITS APPLICATION TO THE DAMPING OF A LIBRATING EARTH SATELLITE,

Descriptive Note:

Corporate Author:

JOHNS HOPKINS UNIV SILVER SPRING MD APPLIED PHYSICS LAB

Personal Author(s):

• Smola,J. F.
• Schrantz,Paul R.
• Tossman,B. E.

Report Date:

1963-08-01

Pagination or Media Count:

52.0

Abstract:

A method that has been used effectively to damp a librating gravity gradient stabilized earth satellite is described. The device consists of an extremely weak beryllium-copper helical spring plated with cadmium this is the primary damping medium. Some of the problems that confronted the experimenters during the development program are discussed, along with the numerous test data that were collected. Currently accepted theories describing the mechanism of the energy dissipation investigated are enumerated and evaluated. Author

Descriptors:

• *ARTIFICIAL SATELLITES
• *WIRE
• DAMPING
• HELICAL SPRINGS
• SPRINGS
• BERYLLIUM ALLOYS
• COPPER ALLOYS
• PLATING
• CADMIUM
• OSCILLATION
• STRESSES
• INTERNAL FRICTION
• CREEP
• VISCOSITY
• GRAIN BOUNDARIES
• STRAIN(MECHANICS)

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE