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Spacecraft AvionicsENAE 483/788D - Principles of Space Systems Design
U N I V E R S I T Y O FMARYLAND
Spacecraft Avionics
• Avionics overview• Shuttle systems• Constellation systems
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© 2011 David L. Akin - All rights reservedhttp://spacecraft.ssl.umd.edu
Spacecraft AvionicsENAE 483/788D - Principles of Space Systems Design
U N I V E R S I T Y O FMARYLAND
Avionics Functions
from J. F. Hanaway and R. W. Morehead, Space Shuttle Avionics Systems - NASA SP-504, 1989
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Spacecraft AvionicsENAE 483/788D - Principles of Space Systems Design
U N I V E R S I T Y O FMARYLAND
Shuttle Data Bus Architecture
from J. F. Hanaway and R. W. Morehead, Space Shuttle Avionics Systems - NASA SP-504, 1989
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Spacecraft AvionicsENAE 483/788D - Principles of Space Systems Design
U N I V E R S I T Y O FMARYLAND
Displays and Controls Block Diagram
from J. F. Hanaway and R. W. Morehead, Space Shuttle Avionics Systems - NASA SP-504, 1989
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Spacecraft AvionicsENAE 483/788D - Principles of Space Systems Design
U N I V E R S I T Y O FMARYLAND
Communications Block Diagram
from J. F. Hanaway and R. W. Morehead, Space Shuttle Avionics Systems - NASA SP-504, 1989
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Spacecraft AvionicsENAE 483/788D - Principles of Space Systems Design
U N I V E R S I T Y O FMARYLAND
On-Orbit Communications Links
from J. F. Hanaway and R. W. Morehead, Space Shuttle Avionics Systems - NASA SP-504, 1989
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Spacecraft AvionicsENAE 483/788D - Principles of Space Systems Design
U N I V E R S I T Y O FMARYLAND
Shuttle Antenna Locations
from J. F. Hanaway and R. W. Morehead, Space Shuttle Avionics Systems - NASA SP-504, 1989
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Spacecraft AvionicsENAE 483/788D - Principles of Space Systems Design
U N I V E R S I T Y O FMARYLAND
S-Band Network Equipment
from J. F. Hanaway and R. W. Morehead, Space Shuttle Avionics Systems - NASA SP-504, 1989
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Spacecraft AvionicsENAE 483/788D - Principles of Space Systems Design
U N I V E R S I T Y O FMARYLAND
Ku-Band Radar and Communications
from J. F. Hanaway and R. W. Morehead, Space Shuttle Avionics Systems - NASA SP-504, 1989
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Spacecraft AvionicsENAE 483/788D - Principles of Space Systems Design
U N I V E R S I T Y O FMARYLAND
Payload Interfaces
from J. F. Hanaway and R. W. Morehead, Space Shuttle Avionics Systems - NASA SP-504, 1989
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Spacecraft AvionicsENAE 483/788D - Principles of Space Systems Design
U N I V E R S I T Y O FMARYLAND
Shuttle Baseline Systems Architecture
from J. F. Hanaway and R. W. Morehead, Space Shuttle Avionics Systems - NASA SP-504, 1989
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Spacecraft AvionicsENAE 483/788D - Principles of Space Systems Design
U N I V E R S I T Y O FMARYLAND
Shuttle Avionics Installations
from J. F. Hanaway and R. W. Morehead, Space Shuttle Avionics Systems - NASA SP-504, 1989
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Spacecraft AvionicsENAE 483/788D - Principles of Space Systems Design
U N I V E R S I T Y O FMARYLAND
Software Architecture
from J. F. Hanaway and R. W. Morehead, Space Shuttle Avionics Systems - NASA SP-504, 1989
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Spacecraft AvionicsENAE 483/788D - Principles of Space Systems Design
U N I V E R S I T Y O FMARYLAND
Navigation, Guidance, and Control Elements
from J. F. Hanaway and R. W. Morehead, Space Shuttle Avionics Systems - NASA SP-504, 1989
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Spacecraft AvionicsENAE 483/788D - Principles of Space Systems Design
U N I V E R S I T Y O FMARYLAND
Reaction Control System Architecture
from J. F. Hanaway and R. W. Morehead, Space Shuttle Avionics Systems - NASA SP-504, 1989
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Spacecraft AvionicsENAE 483/788D - Principles of Space Systems Design
U N I V E R S I T Y O FMARYLAND
Crew Audio System
from J. F. Hanaway and R. W. Morehead, Space Shuttle Avionics Systems - NASA SP-504, 1989
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Spacecraft AvionicsENAE 483/788D - Principles of Space Systems Design
U N I V E R S I T Y O FMARYLAND
Electrical Power Distribution Bus (1 of 3)
from J. F. Hanaway and R. W. Morehead, Space Shuttle Avionics Systems - NASA SP-504, 1989
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Spacecraft AvionicsENAE 483/788D - Principles of Space Systems Design
U N I V E R S I T Y O FMARYLAND
CEV Avionics Architecture
• Command and Data Handling (C&DH)• Displays and Control (D&C)• Communications and Tracking (C&T)• Instrumentation wiring• Flight software
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Spacecraft AvionicsENAE 483/788D - Principles of Space Systems Design
U N I V E R S I T Y O FMARYLAND
So How Do You Do “Avionics”?• Create specifications
– Sensor list (type, location, number, criticality)– Networking strategy– Estimate of processing throughput
• Complexity of controlling equations• Required cycle times
– Communications bandwidth
• Select critical components– Data management units– Redundancy strategies– Communications frequencies
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Spacecraft AvionicsENAE 483/788D - Principles of Space Systems Design
U N I V E R S I T Y O FMARYLAND
Avionics Design (continued)
• System block diagrams• Interface control documentation• Power and thermal budgets• Crew interfaces (controls and displays)• Failure modes and effects analysis• Probabilistic risk assessment
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