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Lunar Reconnaissance Orbiter (LRO)
SRR/Mechanical System
August 16-18, 2005
Giulio.G.Rosanova@nasa.gov 301-286-5907
NASA’s Goddard Space Flight Center 16 - 1
Lunar Reconnaissance Orbiter (LRO)
Mechanical System Applicable Documents
431-RQMT-000004 LRO Requirements Document
430-PG-1410.2.1 Robotic Lunar Exploration Program Configuration Management Procedure
430-RQMT-000006 Robotic Lunar Exploration Program Mission Assurance Requirements Document
431-ANYS-000010 Radiation Analysis for the Lunar Reconnaissance Orbiter
431-PLAN-000005 LRO Systems Engineering Management Plan
431-PLAN-000110 LRO Contamination Control Plan
431-SPEC-000008 Electrical Systems Specification
431-SPEC-000012 LRO Mechanical Systems Specification
431-SPEC-000091 LRO Thermal Systems Specification
431-SPEC-000112 LRO Technical Resource Allocation Specification
431-SPEC-000113 LRO Pointing and Alignment Specification
(ALL) LRO Instrument Mechanical Interface Control Documents
(ALL) LRO Spacecraft Component Mechanical Interface Control Documents
NASA’s Goddard Space Flight Center 16 - 2
Lunar Reconnaissance Orbiter (LRO)
Mechanical System Level 2 Flow Down Key Requirements
Level 2 Req. Level 3: Requirements Concept/Compliance
Paragraph Requirement
MRD-21 Mechanical Level The Mechanical System shall be adequately designed and analyzed to support a 14 Month See PM, AM, IM, DPLY Level 4 Specs.,
Mission Duration 3 Requirements Mission Life. Mech. CAD Model, Mech. Assembly
Paragraph 1.0 The Mechanical System shall be designed and analyzed to minimize Thermal/Structural Drawing Packages, Analysis Reports
Distortion and maximize Stability
MRD-70 Mechanical Level The Mechanical System shall accommodate the LRO Components/Instruments/Tech See PM, AM, IM, DPLY Level 4 Specs.,
Structural 3 Requirements Demo and their Requirements , including Optical FOV and Thermal Radiator FOV Mech. CAD Model, Mech. Assembly
Stability Paragraph 2.0 & requirements, as well as pointing and alignment requirements. Drawing Packages, Analysis Reports
MRD-71 Paragraph 3.0 The Mechanical System shall accommodate the CRaTER, Diviner, LAMP, LEND, LOLA, &
Fields of View LROC, Instruments and their Requirements per Inst. MICDs
MRD-73 The Mechanical System shall accommodate the Mini-RF Tech Demo and its
Accessibility Requirements per Inst. MICDs
The Mechanical System shall accommodate the Spacecraft Components and their
Requirements per MICDs.
MRD-15 Mechanical Level The Mechanical System shall provide a release, deployment, and articulation system for See DPLY Level 4 Specs., Mech. CAD
Solar Array 3 Requirements the deployment and articulation of the Solar Arrays (SADAS). Model, Mech. Assembly Drawing
Tracking Paragraph 3.0 The Mechanical System shall provide a release, deployment, and articulation system for Packages, Analysis Reports
MRD-16 the deployment and articulation of the High Gain Antenna System (HGADAS)its
Antenna Tracking
MRD-2 Mechanical Level The Mechanical System shall be compatible with the DELTA II Launch Vehicles and their See LRO-L/V MICD. CAD Model, Mech.
Launch Vehicle 3 Requirements requirements per LRO-L/V Mission Specification (TBD Doc. #) Assembly Drawing Packages, Analysis
MRD-28 Paragraph 4.0 The Mechanical System shall be designed to meet the mechanical requirements of the Reports
Vehicle Delta II L/V as defined in the DELTA II Payload Planners Guides
Interfaces
NASA’s Goddard Space Flight Center 16 - 3
Lunar Reconnaissance Orbiter (LRO)
Mechanical System Level 2 Flow Down Key Requirements
Level 2 Req. Level 3: Requirements Concept/Compliance
Paragraph Requirement
MRD-49 Mechanical Level The Mechanical System shall comply with LRO LRO Pointing and Alignment Specification See PM, AM, IM, DPLY Level 4 Specs.,
Pointing 3 Requirements 431-SPEC-000113, Includes Instrument, S/C Components, Solar Array & High Gain Mech. CAD Model, Mech. Assembly
Allocations Paragraph 5.0 Antenna Drawing Packages, Analysis Reports
??? Mechanical Level The Mechanical System shall Adopt a Single String approach for the Mechanical / See PM, AM, IM, DPLY Level 4 Specs.,
3 Requirements Structural Design and Development and perform adequate analyses and tests to verify Mech. CAD Model, Mech. Assembly
Paragraph 8.0 design. Selective Redundancy shall be allowed Drawing Packages, Analysis Reports
MRD-76 Mechanical Level The Mechanical System shall provide the LRO Observatory MGSE. See PM, AM, IM, DPLY Level 4 Specs.,
Support 3 Requirements Mech. CAD Model, Mech. Assembly
Equipment Paragraph 11.0 Drawing Packages, Analysis Reports
MRD-69 Mechanical Level The Mechanical System shall Incorporate Instrument Dry Purge Lines on Orbiter up to T-0 See PM, AM, IM, DPLY Level 4 Specs.,
Contamination 3 Requirements (umbilical break-away line). Mech. CAD Model, Mech. Assembly
Control Paragraph 14.0 Drawing Packages, Analysis Reports
NASA’s Goddard Space Flight Center 16 - 4
Lunar Reconnaissance Orbiter (LRO)
Mechanical Concept
ADDITIONAL VIEWS
TO FOLLOW
NASA’s Goddard Space Flight Center 16 - 5
Lunar Reconnaissance Orbiter (LRO)
Mechanical Verification Summary
• Verify all Mechanical / Structural Designs and Functionality
– Analysis
• Comply with LRO General Structural-Thermal Environments, Interface, and Veification
Requirements
• Overall System Level Verification Matrix
• Verification by Analysis, and or Verification by Test of Proto-Type and/or Proto-Flight
Units
• Facilitate Functional and Performance testing of the LRO Observatory
• S/A & HGA Deployment Monitoring (Potentiometers)
• S/A & HGA shall Survive in Deployed Position Immediately after Observatory Separation
thru LTO
– Qualification Testing
• Mech System
• Orbiter
– Functional Testing
• Life Tests
• Deployment testing in T/V
NASA’s Goddard Space Flight Center 16 - 6
Lunar Reconnaissance Orbiter (LRO)
Mechanical Requirements Summary
• Mechanical System is ready to proceed to PDR
NASA’s Goddard Space Flight Center 16 - 7
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