NDLI: System control of an autonomous planetary mobile spacecraft

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System control of an autonomous planetary mobile spacecraft

Content Provider	NASA Technical Reports Server (NTRS)
Author	Zimmerman, Barbara A. Dias, William C.
Copyright Year	1990
Description	The goal is to suggest the scheduling and control functions necessary for accomplishing mission objectives of a fairly autonomous interplanetary mobile spacecraft, while maximizing reliability. Goals are to provide an extensible, reliable system conservative in its use of on-board resources, while getting full value from subsystem autonomy, and avoiding the lure of ground micromanagement. A functional layout consisting of four basic elements is proposed: GROUND and SYSTEM EXECUTIVE system functions and RESOURCE CONTROL and ACTIVITY MANAGER subsystem functions. The system executive includes six subfunctions: SYSTEM MANAGER, SYSTEM FAULT PROTECTION, PLANNER, SCHEDULE ADAPTER, EVENT MONITOR and RESOURCE MONITOR. The full configuration is needed for autonomous operation on Moon or Mars, whereas a reduced version without the planning, schedule adaption and event monitoring functions could be appropriate for lower-autonomy use on the Moon. An implementation concept is suggested which is conservative in use of system resources and consists of modules combined with a network communications fabric. A language concept termed a scheduling calculus for rapidly performing essential on-board schedule adaption functions is introduced.
File Size	1212097
Page Count	16
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19900012997
Archival Resource Key	ark:/13960/t89h0js1c
Language	English
Publisher Date	1990-05-01
Access Restriction	Open
Subject Keyword	Cybernetics Controllers Control Systems Design Airborne/spaceborne Computers Reliability Engineering Scheduling Calculus Architecture Computers Systems Management Interplanetary Spacecraft Monitors Spacecraft Control Autonomy Artificial Intelligence Roving Vehicles Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Article

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