Lecture #26 December 2, 2014 Avionics overview Shuttle systems Constellation systems 1 2014 David L. Akin - All rights reserved http://spacecraft.ssl.umd.edu
Avionics Functions from J. F. Hanaway and R. W. Morehead, Space Shuttle Avionics Systems - NASA SP-504, 1989 2
Shuttle Data Bus Architecture from J. F. Hanaway and R. W. Morehead, Space Shuttle Avionics Systems - NASA SP-504, 1989 3
Displays and Controls Block Diagram from J. F. Hanaway and R. W. Morehead, Space Shuttle Avionics Systems - NASA SP-504, 1989 4
Communications Block Diagram from J. F. Hanaway and R. W. Morehead, Space Shuttle Avionics Systems - NASA SP-504, 1989 5
On-Orbit Communications Links from J. F. Hanaway and R. W. Morehead, Space Shuttle Avionics Systems - NASA SP-504, 1989 6
Shuttle Antenna Locations from J. F. Hanaway and R. W. Morehead, Space Shuttle Avionics Systems - NASA SP-504, 1989 7
S-Band Network Equipment from J. F. Hanaway and R. W. Morehead, Space Shuttle Avionics Systems - NASA SP-504, 1989 8
Ku-Band Radar and Communications from J. F. Hanaway and R. W. Morehead, Space Shuttle Avionics Systems - NASA SP-504, 1989 9
Payload Interfaces from J. F. Hanaway and R. W. Morehead, Space Shuttle Avionics Systems - NASA SP-504, 1989 10
Shuttle Baseline Systems Architecture from J. F. Hanaway and R. W. Morehead, Space Shuttle Avionics Systems - NASA SP-504, 1989 11
Shuttle Avionics Installations from J. F. Hanaway and R. W. Morehead, Space Shuttle Avionics Systems - NASA SP-504, 1989 12
Software Architecture from J. F. Hanaway and R. W. Morehead, Space Shuttle Avionics Systems - NASA SP-504, 1989 13
Navigation, Guidance, and Control Elements from J. F. Hanaway and R. W. Morehead, Space Shuttle Avionics Systems - NASA SP-504, 1989 14
Reaction Control System Architecture from J. F. Hanaway and R. W. Morehead, Space Shuttle Avionics Systems - NASA SP-504, 1989 15
Crew Audio System from J. F. Hanaway and R. W. Morehead, Space Shuttle Avionics Systems - NASA SP-504, 1989 16
Electrical Power Distribution Bus (1 of 3) from J. F. Hanaway and R. W. Morehead, Space Shuttle Avionics Systems - NASA SP-504, 1989 17
CEV Avionics Architecture Command and Data Handling (C&DH) Displays and Control (D&C) Communications and Tracking (C&T) Instrumentation wiring Flight software 18
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 26
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 27
Matrix Organization The ENAE484 project team (33 people) will be divided into six specialty groups Systems Integration (SI) Mission Planning and Analysis (MPA) Loads, Structures, and Mechanisms (LSM) Power, Propulsion, and Thermal (PPT) Crew Systems (CS) Avionics and Software (AVS) You will be assigned to a specialty group - but you do get to express your preferences 28
Systems Integration Overall coordination of design activities Overall program design Development of canonical system configurations Vehicle- and system-level trade studies Cost estimation and program budgeting Mass budgeting and allocation CG and inertia matrix development Advanced technologies (e.g., robotics, EVA) 29
Mission Planning and Analysis Creation and maintenance of design reference mission(s) (DRM) Orbital mechanics and launch/entry trajectories Determination of operational mission objectives Concept of operations (CONOPS) Programmatic planning (sequence of missions) Science instrument/payload definition 30
Loads, Structures, and Mechanisms Identification and estimation of loads sources Structural design and analysis Selection of structural shapes and materials Stress modeling Deformation estimation Design optimization Design of mechanisms (docking/berthing ports, separation mechanisms, launch holddowns, engine gimbals)) Tracking of critical margins of safety 31
Power, Propulsion, and Thermal Electrical power generation Energy storage Power management and conditioning Primary propulsion (orbital maneuvering) Reaction control system (rotation/translation) Design of propellant storage and feed systems Thermal modeling and analysis Thermal control systems Power budgets 32
Crew Systems Internal layout Emergency egress systems Lighting and acoustics Window and viewing analysis Life support systems Air revitalization Water collection and regeneration Cabin thermal control Waste management Food and hygiene EVA accommodations 33
Avionics and Software Data management (flight computers) Networking Sensors Power distribution Guidance system Control systems, including attitude control Communications Robot control systems Software Data transmission budgets 34
Expressing Your Preferences Go on the Canvas site for ENAE483 - http://myelms.umd.edu Take the quiz on 484 Assignment Preference AHP pair-wise comparison of groups Overall comments on assignment Complete the assignment ASAP, but no later than Saturday night so I can process the data and have the assignments by class next week 35