Page:Advanced Automation for Space Missions.djvu/281

 Hence, the mass of each paving robot is about 2400 kg. The fleet of five included with the original seed totals 12,000 kg.

Paving robot computers must serve a number of functions, including autopilot, dish mirror guidance and control, planar mirror guidance and control, executive operating program execution, operational "timesheet" memory for the run in progress, traffic pattern coordination with other robots, neighbor machine avoidance, self-diagnostic routines for simple malfunctions, pattern recognition for slab working area imaging, sensor control and data processing, energy system maintenance, lunar solar ephemeris memory and calculation of solar pointing angles, navigation and drive wheel control, and various routines for recognition and verification of task completion. The computation capacity needed to handle these functions probably is in the range 106-107 bits (about 64 K-512 K bytes). The information necessary to completely describe the machine for purposes of replication is probably about an order of magnitude greater, roughly 107-108 bits.

5C.5 References

Anderson, Alfred T., Jr.: Basalt. in Encyclopedia of Science and Technology, vol. 2, McGraw-Hill, New York, 1977, pp.110-110D.

Baumeister, Theodore; and Marks, Lionel S., eds.: Standard Handbook for Mechanical Engineering. 7th Ed. McGraw-Hill, New York, 1967.

Cable, J. Wesley: Induction and Dielectric Heating. Reinhold Publishing Corp., New York, 1954.

Curtis, Frank W.: High-Frequency Induction Heating. 2nd ed., McGraw-Hill Book Company, Inc., New York, 1950.

Davies, John; and Simpson, Peter: Induction Heating Handbook. McCraw-Hill Book Company, Ltd., London, 1979.

Freitas, Robert A., Jr.: A Self-Reproducing Interstellar Probe. J. of the British Interplanetary Sec., vol. 33, July 1980, pp.251-264.

Nichols, Herbert L., Jr.: Moving the Earth: The Workbook of Excavation. 3rd ed. North Castle Books, Greenwich, Conn., 1976.

Rowley, J. C.; and Neudecker, J.W.: Melted In-Place Lunar Soil for Construction of Primary Lunar Surface Structures. In Extraterrestrial Materials Processing and Construction, David R. Criswell, ed. Final Report, NSR 09-051-001 Mod. No. 24, Lunar and Planetary Institute, Houston, Texas, 31 January 1980, pp. 215-219. (Also published as NASA CR-158870.)

U.S. Department of the Interior: Earth Manual: A Manual on the Use of Earth Materials for Foundation and Construction Purposes. Reprinted by Bureau of Reclamation, with revisions, February 1952.

Weast, Robert C.: Handbook of Chemistry and Physics. 49th ed. CRC Company, Cleveland, Ohio, 1968.

Zwikker, C.: Physical Properties of Solid Materials. Interscience, New York, 1954.