PENDULUM STEERING FOR THERMAL PROBES IN GLACIERS.

Abstract

Pendulum steering, a new concept of attitude stabilization for thermal probes or coring drills in ice, eliminates instability. The center of support is placed above the center of gravity. A lower and upper hot point produce melt penetration. The ratio of their power levels is the basis for stabilization, which is provided by the automatic control of the heater in the upper hot point. This feature makes possible a single thermal probe design that is suitable for all ice cap temperatures and a wide range of penetration rates (i.e., applied power levels). The simplicity of a thermal probe with pendulum steering suggests availability at modest cost and versatility as a widely applicable tool. (Author)

Document Details

Document Type
Technical Report
Publication Date
Jul 01, 1967
Accession Number
AD0657581

Entities

People

  • Haldor W. C. Aamot

Organizations

  • Cold Regions Research and Engineering Laboratory

Tags

DTIC Thesaurus Topics

  • Automatic
  • Availability
  • Center Of Gravity
  • Glaciers
  • Gravity
  • Ice
  • Instability
  • Pendulums
  • Power Levels
  • Steering

Readers

  • Control Systems Engineering.
  • Electrical Engineering
  • Polar and Arctic Studies