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NASA A NASA A LTAIR LTAIR Lunar Lander Lunar Lander Project Project Avionics System Architecture Study Avionics System Architecture Study Minimum Functional Architecture Minimum Functional Architecture (Subsystems & Components) (Subsystems & Components) 09 April 2008 09 April 2008

NASA A LTAIR Lunar Lander Project Avionics System Architecture Study

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NASA A LTAIR Lunar Lander Project Avionics System Architecture Study Minimum Functional Architecture (Subsystems & Components) 09 April 2008. ALTAIR Avionics System Definition. Generic Avionics System Definition: The integrated group of all Lunar Lander Vehicle - PowerPoint PPT Presentation

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Page 1: NASA A LTAIR  Lunar Lander Project Avionics System Architecture Study

NASA ANASA ALTAIRLTAIR Lunar Lander Project Lunar Lander ProjectAvionics System Architecture StudyAvionics System Architecture Study

Minimum Functional ArchitectureMinimum Functional Architecture(Subsystems & Components)(Subsystems & Components)

09 April 200809 April 2008

Page 2: NASA A LTAIR  Lunar Lander Project Avionics System Architecture Study

ALTAIR Avionics System Definition

Generic Avionics System Definition: The integrated group of all Lunar Lander Vehicle

flight electrical, electronic, and electro-mechanical components, flight wiring harnesses connected to those components,

and flight software loaded into those components.

Major Avionics Subsystems:• Command & Data Handling (C&DH)• Communications & Tracking (C&T) • Electrical Power Avionics • Guidance Nav & Control (GN&C) Avionics• Crew I/F, Controls, Displays & A/V• Flight Software (FSW)

Minor Avionics Subsystems:• Thermal Control & Monitoring Avionics• Mechanism Control & Monitoring• Reaction Control System Avionics• Cryogenic Control & Monitoring Avionics• Thrust Vector Control & Monitoring Avionics• Descent Main Engine Control & Monitoring• Ascent Main Engine Control & Monitoring• Life Support System Control & Monitoring

Page 3: NASA A LTAIR  Lunar Lander Project Avionics System Architecture Study

Level #

LevelTitle Level Description This

Package

1 VehicleLevel

• Vehicle Functions and Performance Levels Defined.• Vehicle Treated as “Black-Box”. No Internal Implementation biases.• Interfaces to other Major Exploration System Elements Defined.

2Stages

& ModulesLevel

• Module Functions and Performance Levels Defined.• Modules Treated as “Black-Boxes”. No Internal Implementation biases.• Inter-Module Interfaces Defined.• Stage Separation Interfaces Defined.

3Subsystems

& Components Level

• Components include Electronic Boxes, Antennas, Sensors, etc.• Component Functions and Performance Levels Defined.• Components Treated as “Black-Boxes”. No Internal Implementation biases.• Component Interfaces Defined: Power, C&T, Data, etc.• Power Distribution, Data Networks, and Packaging Approaches Defined.

4-HWHardware

Sub-Assemblies Level

• Hardware Sub-Assemblies include Cards, Backplanes, Chasses, etc.• Sub-Assembly Functions and Performance Levels Defined.• Cards Treated as “Black-Boxes”, but assumed part technologies defined.• Card Interfaces Defined: Box-External and Box-Internal.• Box-Internal Power Distribution, Data Networks, and Packaging Defined.

4-SW Software Level

• Flight Software Architecture Topology Showing Distributed Elements• Flight Software Communication Architecture w/ OSI Reference Model Layers• Flight Software Layered Architecture Models • Potential Implementations of Op Systems, I/O Drivers, Application Tasks, etc

Design Package Partitioning and Scope

Page 4: NASA A LTAIR  Lunar Lander Project Avionics System Architecture Study

Avionics SystemAvionics SystemLevels 1&2 Design DrawingLevels 1&2 Design Drawing

&&Component DescriptionComponent Description

Page 5: NASA A LTAIR  Lunar Lander Project Avionics System Architecture Study

Level 1 – Vehicle Interface Block Diagram Interface

Color-Coding By Type

ALTAIR Lunar Lander Project Avionics System

Level 1: Vehicle Interface Diagram Pre-Launch1

LEO Loiter3

Lunar Orbit Insertion8Lunar Orbit Loiter9Lunar Descent & Landing10Lunar Surface Operations11Lunar Ascent12Lunar CEV Rendezvous & Docking13Lunar Ascent Stage Disposal14

Trans-Lunar Coast7

Trans-Lunar Injection Maneuver6Post CEV-Docking Operations5LEO CEV Rendezvous & Docking

Launch into LEO

Mission Phases

4

2

#Pre-Launch1

LEO Loiter3

Lunar Orbit Insertion8Lunar Orbit Loiter9Lunar Descent & Landing10Lunar Surface Operations11Lunar Ascent12Lunar CEV Rendezvous & Docking13Lunar Ascent Stage Disposal14

Trans-Lunar Coast7

Trans-Lunar Injection Maneuver6Post CEV-Docking Operations5LEO CEV Rendezvous & Docking

Launch into LEO

Mission Phases

4

2

#

Design Reference Missions Design Reference Missions ((DRMsDRMs))

Single Lander design configurable as 3 different variants to support the 3 DRMs.

Common Descent Module for all DRMs

Common ‘minimized’ Ascent Module (AM) for Sortie and Outpost DRMs

Utilized for surface missions up to seven days where crew will use ascent stage as living quarters and a base of operations for EVAs.

Employs all major elements -- descent module, ascent module, airlock.

LunarLunarSortie Sortie CrewCrew

Utilized for surface missions up to seven days where crew will use ascent stage as living quarters and a base of operations for EVAs.

Employs all major elements -- descent module, ascent module, airlock.

LunarLunarSortie Sortie CrewCrew

Utilized for surface missions up to 210 days where crew will work out of the Outpost. Configured similar to sortie variant, but without airlock; crew will depressurize ascent

module upon landing and head directly for outpost. Keep-alive power assumed to be provided by outpost.

LunarLunarOutpost Outpost

CrewCrew

Utilized for surface missions up to 210 days where crew will work out of the Outpost. Configured similar to sortie variant, but without airlock; crew will depressurize ascent

module upon landing and head directly for outpost. Keep-alive power assumed to be provided by outpost.

LunarLunarOutpost Outpost

CrewCrew

Utilized to deliver large elements to the Outpost. No ascent stage or crew; cargo will sit on upper deck of descent stage. “Kits” for vehicle components normally resident in ascent stage.

LunarLunarCargoCargo

Utilized to deliver large elements to the Outpost. No ascent stage or crew; cargo will sit on upper deck of descent stage. “Kits” for vehicle components normally resident in ascent stage.

LunarLunarCargoCargo

Communications & Tracking Network

(CTN)

Earth Departure Stage(EDS)

OrionCrew Exploration Vehicle

(CEV)

Lunar Surface Systems

(LSS)

Lunar Lander Vehicle

RevisionDate:

02-22-2008

PowerAll DRMs: Phase 1

Hard-LineAll DRMs: Phase 1

PowerDRMs: Phases:Sortie: 5-9, 13Outpost: 5-9, 13Cargo: na

Hard-LineDRMs: Phases:Sortie: 5-9, 13Outpost: 5-9, 13Cargo: na

PowerDRMs: Phases:Sortie: 1-6Outpost: 1-6Cargo: 1-3, 6

Hard-LineDRMs: Phases:Sortie: 1-6Outpost: 1-6Cargo: 1-3,6

PowerDRMs: Phases:Sortie:Outpost: 11Cargo: 11?

RF (S)DRMs: Phases:Sortie: 11Outpost: 11Cargo: 11

RF (S)DRMs: Phases:Sortie: 4, 9-14Outpost: 4, 9-14Cargo: na

Ares V Launch Tower

RF Interfaces

Power Lines

C3I Hard-Lines

RF (S)DRMs: Phases:Sortie: 1, 3-5, 9-14Outpost: 1, 3-5, 9-14Cargo: 1, 3, 6, 7, 9-11

Phase 8 Note:LOI Manuever is obscured by the moon

Note:The Diagram Below Defines

42 Separate Vehicle Interface Configurations:

3 DRMs x 14 Phases(Data, Control, Monitor, Timing)

Page 6: NASA A LTAIR  Lunar Lander Project Avionics System Architecture Study

Level 2 – Consolidated Module Block Diagram

Outpost Payload DRMs: Phases:Outpost: 1-11

Cargo PayloadDRMs: Phases:Cargo: 1-3, 6-11

Power

Air-Lock Module

DRMs: Phases:

Sortie: 1-11

Hard-Line

Hard-Line

Power

StageColor-Coding

By Type

Lunar Lander

Ascent Stage

Lunar Lander

Ascent Stage (Crew Sortie & Outpost DRMs)

PowerDRMs: Phases:Sortie: 5-9, 13Outpost: 5-9, 13Cargo: N/A

Hard-LineDRMs: Phases:Sortie: 5-9, 13Outpost: 5-9, 13Cargo: N/A

PowerDRMs: Phases:Sortie: 1-6Outpost: 1-6Cargo: 1-6

Hard-LineDRMs: Phases:Sortie: 1-6Outpost: 1-6Cargo: 1-6

RF (S)DRMs: Phases:Sortie: 4, 9, 10-14Outpost: 4, 9, 10-14Cargo: 8-11

Communications & Tracking Network (CTN)

Earth Departure Stage (EDS)

Lunar SurfaceSystems (LSS)

RF (S)DRMs: Phases:Sortie: 11Outpost: 11Cargo: 11

Ares V LaunchTower

Lunar Surface Systems (LSS)

Comm & Tracking Network (CTN) Orion Crew Exploration Vehicle (CEV)

RF (S)DRMs: Phases:Sortie: 3-7, 9-11Outpost: 3-7, 9-11Cargo: 3, 6, 7, 9-11

RF (S)DRMs: Phases:Sortie: 3-7, 9-14Outpost: 3-7, 9-14Cargo: 3, 6, 7, 9-11

ALTAIR Lunar Lander Project Avionics System

Level 2: Stage & Module Diagram

PowerAll DRMs: Phase 1

Hard-LineAll DRMs: Phase 1

RF (S)DRMs: Phases:Sortie: 11Outpost: 11Cargo: 11

PowerDRMs: Phases:Sortie:Outpost: 11Cargo: 11

Common Services Assembly (CSA)

DRMs: Phases:

Sortie: 1-14Outpost: 1-14Cargo: 1-3, 6-11

Power

DescentModule

DRMs: Phases:

Sortie: 1-11Outpost: 1-11Cargo: 1-3, 6-11

AscentModule

DRMs: Phases:

Sortie: 1-14Outpost: 1-14

Cargo DRM Connections

Crew DRM Connections

Interface Color-Coding

By Type

RevisionDate:

03-07-2008(Data, Control, Monitor, Timing)

RF Interfaces

Power Lines

C3I Hard-Lines

ConsolidatedDRM Diagram(All 3 DRMs)

Sortie Payload DRMs: Phases:Sortie: 1-11

C3I Wireless

Page 7: NASA A LTAIR  Lunar Lander Project Avionics System Architecture Study

Level-2 Avionics ArchitectureKey Item

Creation of the Common Services Assembly (CSA): All of the Common Avionics Functions that are required for all 3 Design

Reference Missions (DRMs) were identified and grouped together in a new Level-2 Configuration Item called the “Common Services Assembly” (CSA).

Rationale/Benefits: Centralization/Consolidation of Common Items: The CSAs eliminate any DRM-Unique

implementations of common functions, and any unnecessary duplication of functions/implementations in different modules within a particular DRM, thereby minimizing the avionics system size, mass, power, and cost.

Economies of Scale: The CSAs can be “mass-produced” for use in every mission (9), regardless of the particular DRM, resulting in major cost savings, significant schedule reduction, common verification & test, and operational simplification. Even greater benefits can be achieved if the CSA is also used for other Lunar Surface Systems.

CSA Top-Level Physical Packaging Configuration: Each DRM Type may have a unique CSA top-level packaging configuration and harness,

however, their CSA Hardware Components will be identical. The CSAs may have to be split into separate physical entities, such as a CSA Electronic

Box Bay and a CSA Sensor/Antenna Ring.

Page 8: NASA A LTAIR  Lunar Lander Project Avionics System Architecture Study

+X

+Y

+Z

+Y

6.22 m1 1

3

2,4 2,4

3

Sortie Cargo Size Unknown

Airlock

4 4

4

33

4

Orion “Keep Out” z

one

33

2,4

Position Pros Cons

1 • Easily integrated into all 3 DRM’s• Ring Concept

• Engine radiative heating problems• Potential interference with AM adapter during separation

2 • Still ring concept, that is integratable into all 3 DRM’s

• Visibility out of top windows• Orion “keep out” zone

3 • Not much interference with other systems• Additional truss structure for mounting• Potential cabling issues

4 • Only available uncluttered real estate left that is close to AM press. vessel • May encroach on sortie cargo space

Ascent Module CSA AvionicsPlatform Placement Options

Page 9: NASA A LTAIR  Lunar Lander Project Avionics System Architecture Study

Level 3Level 3Avionics System Data Processing Avionics System Data Processing and Data Architecture Descriptionand Data Architecture Description

Page 10: NASA A LTAIR  Lunar Lander Project Avionics System Architecture Study

Avionics – Data Processing & Data Architecture Description

• Driven by requirement of minimum mass and power and high reliability of maintaining vehicle control and crew safety

• Composed of two Architectural Elements optimized to perform:Vehicle Flight Control– Centralized General Purpose Processor – Distributed vehicle control effectors and sensors– Crew Controls and Displays– Interconnected by “low speed” highly deterministic data network Communications and Data Management– RF Communications units– Video imaging and processing units– Data Routers– Interconnected by “high speed” data network and C3I protocols

Page 11: NASA A LTAIR  Lunar Lander Project Avionics System Architecture Study

Vehicle Control Element -Central Processing

• Central Processor Performs– Vehicle level closed loop control processing – Vehicle monitoring & configuration mgmt processing– Redundancy management processing– User Display and Controls (C&D) processing (Flt Crew and Ground)– Subsystems processing suited for “general purpose processors”

• Central Processor Precepts and Attributes– “Low/Medium” performance general purpose processor– Focused on high reliability, low power “bullet proof” proven hardware– High performance special purpose processing needs are offloaded to sensors,

effectors, and special processors where necessary– Allows a low speed, highly reliable and low power vehicle control network solution

Page 12: NASA A LTAIR  Lunar Lander Project Avionics System Architecture Study

Vehicle Control Element -Sensor and Effectors

• Sensor and control effectors interface with central processor via two methods depending on complexity/functionality of the unit

“Electronic and processing intense” Units (“Type A”)– Units interface directly with the low speed - Vehicle Control Data Network (VCDN) – Processing intense sensor and effector units also contain special purpose processors (SW

and/or Firmware) for pre-processing and data formatting– Offloads the central processor and reduces network traffic required– Units consist of:

– IMU - Descent Main Engine (DME) Controller– Star Tracker - S-Band SDR*, Router*, & CIU– Lidar* - D&C Controller*– Landing Radar - PDU– Hazard Detection Sensor* - RPC– Video Processor (VPU)* - Fuel Cell Electronics– EVA Servicing Unit and Battery Charger

*Note: Units also have port to High Rate Data Network (HRDN) for video and C&T data

Page 13: NASA A LTAIR  Lunar Lander Project Avionics System Architecture Study

Vehicle Control Element -Sensors and Effectors (cont’d)

• “Small, Highly Distributed” Sensors and Effectors (Type “B”)– “Type B” are of the category of distributed and remote temperature sensors, pressure

sensors, position indicators, discrete commands of valve actuation, S&M deploy, and analog drive commands which are of standard type discrete and analogs.

– And, which do not naturally contain sufficient electronic sophistication to interface directly with the vehicle control data network (VCDN)

– “Type B” sensors and effectors interface with central processor via a general purpose data collector/distributor unit dubbed RMUX (remote multiplexer/de-multiplexer)

– Contains a general purpose microcontroller for local processing and control– Atleast 1 in each module and can have significant commonality

– Provides central process interface for subsystems control and Monitoring:– TCS– Life Support– RCS Prop Storage– Cryo Prop Storage – Pyro Events Control (PEC)– Ascent Main Engine Control– RCS Engine Control– Mechanisms Control– Thrust Vector Control (TVC)

Page 14: NASA A LTAIR  Lunar Lander Project Avionics System Architecture Study

Crew and Ground UserCommand & Control (C&C) Interface

• Crew C&C Interface provided by Displays and Controls (D&C) Controller interfacing directly with the Vehicle Control Data Network (VCDN). Hardware consists of:– D&C Controller – Provides local display formatting, display drive and D&C data

routing with Central Processor. High Rate Data Network (HRDN) I/F for video data.

– Flat Screen text and graphic Displays with “Edge Panel Switches”– Keyboards– Vehicle Flight Control Hand Controls – With Rotational, Translational, and Throttle

Control functionality– Caution & Warning Indicators and control Panel

• CEV Flight Crew C&C provided by hard-line interface using D&C equivalent commands and display feedbacks to CEV (also used by preflight checkout users)

• CTN ground access users provided C&C interface via RF communications links using D&C equivalent commanding and/or special applications implement command codes.

Page 15: NASA A LTAIR  Lunar Lander Project Avionics System Architecture Study

Communication and Data Management Element

• Communication and Data Management Element Provides function of:– RF Communications between Lander, CTN, CEV and Surface Sys– Data formatting and encoding– High Speed Data Routing– Video imaging and processing

• Hardware Consists of:– RF Communications units– Video Cameras (landing and Rndz/docking)– Interfaces with LIDAR and Hazard Detection Sensor for any video type image

data provided– Video processing units (VPU)– D&C “Flat screen” display interfaces for Video– Interconnected by “high rate” data network and C3I protocols– C3I Data Routers

– Interfaces to all external CxP Systems– Provides communication security to Vehicle Control Data Network (VCDN) and Altair– Interface to crew portable networked equipment– Partitions critical function protocols

Page 16: NASA A LTAIR  Lunar Lander Project Avionics System Architecture Study

Avionics SystemAvionics SystemLevel-3 Design DrawingLevel-3 Design Drawing

&&Data Network DescriptionData Network Description

Page 17: NASA A LTAIR  Lunar Lander Project Avionics System Architecture Study

Level 3 - Minimum Functional Block Diagram Avionics Interface

Color-Coding By Type

ALTAIR Lunar Lander Project Avionics System

Level 3: Subsys & Components Diagram

Lunar Surface Systems (LSS)

RF (S)

RevisionDate:

02-13-2008

Comm & Tracking Network (CTN)

Earth Departure Stage (EDS)

Lunar SurfaceSystems (LSS)

RF (S)RF (S)C3I Hard-LinePower Power

Comm & Track Network (CTN) Orion Crew Exploration Vehicle (CEV)

RF (S) RF (S) C3I Hard-linePower

Common Services Assembly (CSA)

Cargo Payload

Ascent Module

Air-Lock Module

Hard-Line

Power

C&DHRemote Mux Unit

· Thermal I/F· RCS (VDE)· AME· Life Support· Mech I/F· THC/RHC I/F

Crew I/F PowerPower

Distribution Unit

Batteries

C&TSpeaker

/ Mic

Crew I/F Unit

GN&CLIDAR

C&DHFlight

Computer

Power

Remote Power

Controller

(RPC)

C&T

Antenna Electronics

SDR

GN&C

Inertial Measurement

Unit (IMU)

S-Band Antenna

Remote Mux Unit· TCS· PEC· Mech Star Tracker

Docking Cam

C&DH

RemoteMux Unit

· Thermal I/F· Life Support

C&TSpeaker /

Microphone

EVA RF Checkout Antenna

Crew I/F Displays & Controls

Suit / Backpack Servicing & Checkout

PowerRemote Power

Controller

(RPC)EVA Battery

Charger

Lunar Lander Ascent Stage (Crew DRMs)

Configuration Item

Color-Coding By Type

Subsystems

VPU

Displays

D&C Elec

Hand Controls

EVA AntC&W

C3IWireless

Power(TBD)

Components

Ares V Launch Tower

(Data, Control, Monitor, Timing)

RF Interfaces

Power Lines

C3I Hard-Lines

Descent ModuleC&DH GN&C

Landing Radar

PowerFuel Cell

Electronics

Power Distribution

Unit

C&TLanding Camera

Hazzard Detection Sensor

S / EVA Comm

Antennas & Elec

DMEDescent

Main Engine

Controller

OutpostPayload

SortiePayload

Remote Mux Unit· Thermal I/F Elec· PEC & Mech I/F Elec· RCS I/F & Drive Elec· Cryo I/F Elec· Thrust Vector Control

Hard-LinePower

Crew DRM Connections

Cargo DRM Connections

C3I Router

Page 18: NASA A LTAIR  Lunar Lander Project Avionics System Architecture Study

Data Network Diagram

C&T

Power C&DH

ALTAIR Lunar Lander Project Avionics System

Level 3: Data Network Diagram

RevisionDate:

04-08-2008

Remote Mux Unit

· Thermal I/F· RCS (VDE)· AME· Life Support· Mech I/F· THC/RHC I/F

Batteries

Remote Power

Controller

(RPC)

GN&C

Remote Mux Unit· TCS· PEC· Mech

RemoteMux Unit

· Thermal I/F· Life Support

Remote Power

Controller

(RPC)

Fuel Cells / Electronics

Power Dist Unit

Remote Mux Unit· Thermal I/F Elec· PEC & Mech I/F Elec· RCS I/F & Drive Elec· Cryo I/F Elec· Thrust Vector Control

LSS

RF (S)

CTN

Crew I/F

Crew I/F Units

(6)

Speaker/Mic

EVA RF Checkout Antenna Suit / Backpack

Servicing & Checkout

EVA Battery Charger

Displays

Hand Controls

EVA Ant

C&W

C3IWireless

S / EVA Comm

Antennas & Elec

DME

Descent Main

Engine Controller

Payload

Flight Computer

Ant Elect

S-Band Ant

6

Software Defined Radio(SDR)

VPU

RF (S)

2

Display &

Control Elec(2)

CEV

C3IWireless

Vehicle Control Data Network (<10 Mbps)

VCDN

High-Rate Data Network (>100 Mbps) HRDN

Vehicle Control Data Network (<10 Mbps) VCDN

Ø Highly-Reliable Low/Medium Rate Data Network for all Critical Communication, Control, and Monitoring

Ø Deterministic Time-Synchronized Protocol

Ø ~300 kbps Throughput Requirement:· Housekeeping Data · Bi-Directional Digital Audio· 20% Packet Overhead

High-Rate Data Network (>100 Mbps) HRDN

Ø High-Rate Data Network for Supplemental Data Communication such as Video Signals, etc.

Ø Event-Driven Protocol

Ø ~300 Mbps Throughput Capability:· Supplemental Control & Monitoring· 2 Bi-Directional Uncompressed Digital Video with

640 x 480 pixel resolution & 30 frames/sec

RF Communications Network

Notes:

Ø The data network diagram above shows logical connections only. No Network Topology is implied (such as point-to-point, ring, etc.)

Ø Estimated Data Network Connections:o Primary Data Network: ~30o Auxiliary Data Network: ~ 12

Configuration Item

Color-Coding By Type

Subsystems

Components

Analog RF point-to-point connectionsBridged to flight networks via C3I router

C3I Hard-Line Network

Direct Hard-Line interface to connected spacecraftFeatures adaptable spacecraft bus for interfaceCould be same bus as HRDN

C3IRouter

EDS

C3I Hard-Lines

CEV

Power Dist Unit

Inertial Measurement

Unit (IMU)

Star Tracker

Landing Radar

Landing CameraLIDAR

Hazzard Detection

Sensor

Docking Cam

Page 19: NASA A LTAIR  Lunar Lander Project Avionics System Architecture Study

Avionics SystemAvionics SystemSubsystem SpecificSubsystem Specific

Design DriversDesign Drivers

Page 20: NASA A LTAIR  Lunar Lander Project Avionics System Architecture Study

Electrical Power Subsystem & Components

Accommodate All External Power Sources: Ares-V Launch Tower via Umbilical Cable and EDS Earth Departure Stage Crew Exploration Vehicle Lunar Outpost

Accommodate LLV Power Sys - Internal Power Generation B/L Approach: Fuel Cells & Assoc Electronics located in Descent Module

Accommodate LLV Power Sys - Internal Power Storage B/L Approach: Batteries located in Ascent Module

Power Switching & Distribution Simple Power Distribution Bus between Modules (sometimes bi-directional) Each Module contains a Power Unit (RPC or PDU) with a Primary Power Bus Input,

Power Distribution Outputs to all required components within that module, and a Vehicle Control Data Network (VCDN) I/F that controls the power switching/distribution within that module.

Support an EDS or insitu Flight Crew initiated startup with an “always-active” power source for "cold start" of Altair - Nominal mission and contingencies.

Power Component Modularity & Commonality RPC and PSDU components in different modules can have significant commonality Avionic Component Power Supply Cards may be able to use common designs.

Page 21: NASA A LTAIR  Lunar Lander Project Avionics System Architecture Study

Communication & Tracking (C&T) Subsystem & Components

Software Defined Radio (SDR) and supporting antennas and electronics Configurable for S-Band, 802.xx, EVA Interfaces to both data networks (VCDN & HSDN) Encoding/decoding (LDPC,etc..) One radio needed for each concurrent link

Video Processing Unit (VPU) ALHAT,LIDAR, & GN&C (Landing\Docking) Video data processing Accepts raw or encoded streams Limited to 2 video streams in each mission phase Processes and distributes camera commands

CIU & Speaker Mic Provides voice communications for astronauts Located in Ascent Module and Air Lock

EVA Checkout Antenna Located in Air Lock for Sortie and Ascent Module for Crew Checkout for EVA

Page 22: NASA A LTAIR  Lunar Lander Project Avionics System Architecture Study

Guidance, Navigation, & Control (GN&C) Subsystem & Components

All GN&C sensors assumed to be Type A “SMART” boxes with direct interface to the Vehicle Control Data Network (VCDN).

Star Tracker – Inertial attitudes Inertial Measurement Unit (IMU) – Rates and Acceleration LIDAR

• Provides range & relative orientation to support docking• Sensor is critical for auto docking

Landing Radar – Altitude and altitude rate, multiple beams Hazard Detection Sensor

Currently not known exactly what functionality will be included Using as a placeholder to provide “HOOKS” for inclusion into design Interfaces directly to the Vehicle Control Data Network (VCDN) for processed data, and to the

High Rate Data Network (HRDN) for video processing Study includes looking at sharing of Altair resources such as cameras and IMU’s Where possible sharing of Altair resources such as cameras and IMU’s is recommended

Page 23: NASA A LTAIR  Lunar Lander Project Avionics System Architecture Study

Propulsion Subsystem & Components

Descent Main Engine Controller (DME)

Controller performs critical function of safe pre-start, start, throttling, monitoring and shutdown of Descent Engine.

Requires critical time sequencing and monitoring performed at 50 HZ• Based on meeting with Kendall Brown while at LaRC

High rates and precision sequencing requirement led to concluding a DME local Controller would be necessary.

Interfaces directly with Flight Computer over Vehicle Control Data Network (VCDN).

Closed-loop control of engine to be performed locally within DME Controller based on high level commands from Central Processor.

Page 24: NASA A LTAIR  Lunar Lander Project Avionics System Architecture Study

BackupBackup

Page 25: NASA A LTAIR  Lunar Lander Project Avionics System Architecture Study

Level 2 – Crew Sortie Block Diagram Interface

Color-Coding By Type

RevisionDate:

03-07-2008

SortiePayloadModule

DRMs: Phases:Cargo: 1-3, 6-11

Power

Air-Lock Module

DRMs: Phases:

Sortie: 1-11

Hard-Line

Power

StageColor-Coding

By Type

Lunar Lander

Ascent Stage

PowerDRMs: Phases:Sortie: 5-9, 13Outpost: 5-9, 13Cargo: N/A

Hard-LineDRMs: Phases:Sortie: 5-9, 13Outpost: 5-9, 13Cargo: N/A

PowerDRMs: Phases:Sortie: 1-6Outpost: 1-6Cargo: 1-6

Hard-LineDRMs: Phases:Sortie: 1-6Outpost: 1-6Cargo: 1-6

RF (S)DRMs: Phases:Sortie: 4, 9, 10-14Outpost: 4, 9, 10-14Cargo: 8-11

Communications & Tracking Network (CTN)

Earth Departure Stage (EDS)

Lunar SurfaceSystems (LSS)

RF (S)DRMs: Phases:Sortie: 11Outpost: 11Cargo: 11

Ares V LaunchTower

Lunar Surface Systems (LSS)

Comm & Tracking Network (CTN) Orion Crew Exploration Vehicle (CEV)

RF (S)DRMs: Phases:Sortie: 3-7, 9-11Outpost: 3-7, 9-11Cargo: 3, 6, 7, 9-11

RF (S)DRMs: Phases:Sortie: 3-7, 9-14Outpost: 3-7, 9-14Cargo: 3, 6, 7, 9-11

(Data, Control, Monitor, Timing)

ALTAIR Lunar Lander Project Avionics System

Level 2: Stage & Module Diagram

PowerAll DRMs: Phase 1

Hard-LineAll DRMs: Phase 1

RF (S)DRMs: Phases:Sortie: 11Outpost: 11Cargo: 11

RF Interfaces

Power Lines

C3I Hard-Lines

Common Services Assembly (CSA)

DRMs: Phases:

Sortie: 1-14Outpost: 1-14Cargo: 1-3, 6-11

DescentModule

DRMs: Phases:

Sortie: 1-11Outpost: 1-11Cargo: 1-3, 6-11

Crew SortieDRM

Hard-Line

Ascent Stage (Crew Sortie & Outpost DRMs)

Power

AscentModule

DRMs: Phases:

Sortie: 1-14Outpost: 1-14

C3IWireless

Lunar Lander (Crew Sortie DRM)

Page 26: NASA A LTAIR  Lunar Lander Project Avionics System Architecture Study

Level 2 – Crew Outpost Block Diagram Stage

Color-Coding By Type

Lunar Lander

Ascent Stage

PowerDRMs: Phases:Sortie: 1-6Outpost: 1-6Cargo: 1-6

Hard-LineDRMs: Phases:Sortie: 1-6Outpost: 1-6Cargo: 1-6

RF (S)DRMs: Phases:Sortie: 4, 9, 10-14Outpost: 4, 9, 10-14Cargo: 8-11

Communications & Tracking Network (CTN)

Earth Departure Stage (EDS)

Lunar SurfaceSystems (LSS)

RF (S)DRMs: Phases:Sortie: 11Outpost: 11Cargo: 11

Ares V LaunchTower

Lunar Surface Systems (LSS)

Comm & Tracking Network (CTN) Orion Crew Exploration Vehicle (CEV)

RF (S)DRMs: Phases:Sortie: 3-7, 9-11Outpost: 3-7, 9-11Cargo: 3, 6, 7, 9-11

RF (S)DRMs: Phases:Sortie: 3-7, 9-14Outpost: 3-7, 9-14Cargo: 3, 6, 7, 9-11

ALTAIR Lunar Lander Project Avionics System

Level 2: Stage & Module Diagram

PowerAll DRMs: Phase 1

Hard-LineAll DRMs: Phase 1

RF (S)DRMs: Phases:Sortie: 11Outpost: 11Cargo: 11

PowerDRMs: Phases:Sortie:Outpost: 11Cargo: 11

Common Services Assembly (CSA)

DRMs: Phases:

Sortie: 1-14Outpost: 1-14Cargo: 1-3, 6-11

DescentModule

DRMs: Phases:

Sortie: 1-11Outpost: 1-11Cargo: 1-3, 6-11

Interface Color-Coding

By Type

RevisionDate:

03-07-2008(Data, Control, Monitor, Timing)

RF Interfaces

Power Lines

C3I Hard-Lines

Crew OutpostDRM

OutpostPayloadModule

Power

C3IWireless

DRMs: Phases:Outpost: 1-11

PowerDRMs: Phases:Sortie: 5-9, 13Outpost: 5-9, 13Cargo: N/A

Hard-LineDRMs: Phases:Sortie: 5-9, 13Outpost: 5-9, 13Cargo: N/A

Hard-Line

Ascent Stage (Crew Sortie & Outpost DRMs)

Power

AscentModule

DRMs: Phases:

Sortie: 1-14Outpost: 1-14

Lunar Lander (Crew Outpost DRM)

Page 27: NASA A LTAIR  Lunar Lander Project Avionics System Architecture Study

Power Hard-Line

StageColor-Coding

By Type

Lunar Lander

Lunar Lander (Cargo DRM)

PowerDRMs: Phases:Sortie: 1-6Outpost: 1-6Cargo: 1-6

Hard-LineDRMs: Phases:Sortie: 1-6Outpost: 1-6Cargo: 1-6

Communications & Tracking Network (CTN)

Earth Departure Stage (EDS)

Lunar SurfaceSystems (LSS)

RF (S)DRMs: Phases:Sortie: 11Outpost: 11Cargo: 11

Ares V LaunchTower

Lunar Surface Systems (LSS)

Comm & Tracking Network (CTN)

RF (S)DRMs: Phases:Sortie: 3-7, 9-11Outpost: 3-7, 9-11Cargo: 3, 6, 7, 9-11

RF (S)DRMs: Phases:Sortie: 3-7, 9-14Outpost: 3-7, 9-14Cargo: 3, 6, 7, 9-11

ALTAIR Lunar Lander Project Avionics System

Level 2: Stage & Module Diagram

PowerAll DRMs: Phase 1

Hard-LineAll DRMs: Phase 1

RF (S)DRMs: Phases:Sortie: 11Outpost: 11Cargo: 11

PowerDRMs: Phases:Sortie:Outpost: 11Cargo: 11

Common Services Assembly (CSA)

DRMs: Phases:

Sortie: 1-14Outpost: 1-14Cargo: 1-3, 6-11

DescentModule

DRMs: Phases:

Sortie: 1-11Outpost: 1-11Cargo: 1-3, 6-11

Interface Color-Coding

By Type

RevisionDate:

03-07-2008(Data, Control, Monitor, Timing)

RF Interfaces

Power Lines

C3I Hard-Lines

CargoDRM

CargoPayloadModule

Power

C3IWirelessDRMs: Phases:

Cargo: 1-3, 6-11

Level 2 – Cargo Block Diagram