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Titan MESSENGER Autonomy Experiment

Titan MESSENGER Autonomy Experiment. Rationale. ST7 Experience Has Shown That Dedicated Autonomy Experiments are not Cost Effective. The Technology Must Be Introduced into an Existing Mission Framework. but

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Titan MESSENGER Autonomy Experiment

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  1. Titan MESSENGER Autonomy Experiment

  2. Rationale • ST7 Experience Has Shown That Dedicated Autonomy Experiments are not Cost Effective. The Technology Must Be Introduced into an Existing Mission Framework. but • Various Studies Have Concluded that Autonomy Capabilities and Requirements Must Be Considered At System Design Time To Achieve Significant Cost/Capability Impact. • The MESSENGER Mission Provides a Unique Opportunity to Achieve Cost-Effective Operational Autonomy by 2010. • Deep Space Environment • Capable On-board Processing Baseline. • On-board Fuel Resources for Extended Orbital Ops (Currently Unplanned) • Development Can Parallel multi-year Cruise Phase • PI Support for “Autonomous Science Platform” Concept

  3. Reference Mission • MErcury Surface, Space ENvironment, GEochemistry and Ranging (MESSENGER) Mission. • April 2004 Launch • June 2006 Orbit Insertion • Four RAD6000 Processors Onboard (25 MHz Clock, 24MB SRAM) • Dedicated Fault Protection Processor Architecture • Legacy Onboard Autonomy Engine

  4. MESSENGER Mission Timelines Development 2001 2002 2003 2004 PDR CDR Start I&T Pre Ship Review Launch DFS/ECS MiniME Potential Autonomous Mercury Ops Phase Operations 2004 2005 2006 2007 2008 2009 2010 2011 Launch Venus Flyby 2 Mercury Flyby 1 Mercury Flyby 2 Mercury Orbit Insertion End Scheduled Mercury Ops End Extended Mercury Ops Venus Flyby 1

  5. Objectives • Conclusively Demonstrate Direct NASA Relevance of Model-based Programming and Execution Frameworks in Science-driven Mission Scenario. • Verifiable Autonomous Behavior • Reactive Time Scales • Establish Essential Connection Between Autonomy Technology Developers and Mission Systems and Software Engineering. • Bridge Current Practices into New Technology Frameworks. • Rule-based Systems into Model-based Systems

  6. Architecture Comparison Baseline Rule List Telemetry Autonomy “Rule Engine” Safe-hold & Earth Acq Commands Command Sequence Mission Planning (ground) Command Processing Commands Clock Model-based Model-based Executive Activity Selection Plant Model Execution Model Mission Planning State Estimates Telemetry Deductive Controller Control Sequencer Clock Commands Configuration Goals Safe-hold & Earth Acq

  7. “Autonomy Rules” in Current Application Example from MESSENGER Safing and Fault Protection Requirements Specification. (Flight Software Design to Support 1280 Rules)

  8. General Plan • Initial Science Concept Study and Technology Development • Development of Ground Operations Decision Support Tool • Realistic Scale Model Development • Shadow Mode Performance Assessment • Operator Interface • Flight Architecture Build Update & Bench Test • Operator Training • Spacecraft Reconfiguration and Checkout • Autonomous Planetary Operations in Extended Mission Phase

  9. Master Schedule

  10. Mission Operations Automation Framework Science Goals S/C Maintenance Requirements State Recovery Goals Science Activity Generation Maintenance Activity Generation Activity Merging Sequence Generation Planning & Scheduling Sequence Validation & Expectation Generation S/C State Model Command Uplink S/C Near Term Focus Epoch 2000 Telemetry Downlink Performance Assessment Contact Automation Real-time Mission Ops Anomaly State Update State Recovery Contingency Operations

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