1990, ISBN: 9781234338060

RareBooksClub. Paperback. New. This item is printed on demand. Paperback. 58 pages. Original publisher: Moffett Field, CA : NASA Ames Research Center, 1990 OCLC Number: (OCoLC)62882088 … Plus…

RareBooksClub. Paperback. New. This item is printed on demand. Paperback. 58 pages. Original publisher: Moffett Field, CA : NASA Ames Research Center, 1990 OCLC Number: (OCoLC)62882088 Subject: Air pilots -- Decision making. Excerpt: . . . by interruption-free independence. We believe that the three middle levels should facilitate more adequate aiding to deep-reasoning tasks. At those levels, the processing is more parallel and both problem solvers have more freedom. Two human problem solvers would interact mostly at those levels; they would suggest, take com-ments and hints, or be silent. Using the three levels of interaction was one of our principles in building the aid for novel fault diagnosis. Another related principle was to consider compatibility of aiding informa-tion with human information processing, THE SYSTEM AND THE TASK The Orbital Refueling System ( ORS ), a NASA-designed payload on the Space Shuttle, was selected for study NASA 1985 . The function of the ORS is to refuel orbiting satellites with hydrazine, with the objective of extending their useful service life. As shown in Figure 2, the ORS fluid system contains a variety of components such as tanks, valves, pipes, etc. The operator controls the simulated ORS by opening and closing valves. Transferring fuel from propellant tank I to propellant tank 2 might proceed as follows. First, tank 2 pressure is reduced by momentarily opening valves 10, 11, 13, and 17. Second, tank 1 is pressurized by opening valves l, 3, and 7. Gaseous nitrogen will flow out of the two small supply tanks, be pressure regulated, and fill tank 1 on one side of the bladder. To transfer fuel to tank 2, valves 5, 14, 15, 16, and 9 would be opened. Because this version of the ORS was for demonstration purposesj all transfers take place between the two large tanks rather than to a satellite fuel tank. There are several assemblies whose purpose was not explained in the above example. The relief valves RVl and RV2 serve as a safety pressure relief. Check This item ships from La Vergne,TN., RareBooksClub<