1. Giulio.G.Rosanova@nasa.gov 301-286-5907
Lunar Reconnaissance Orbiter (LRO) SRR/Mechanical System August 16-18, 2005

2. Lunar Reconnaissance Orbiter (LRO) Mechanical System Applicable Documents
431-RQMT LRO Requirements Document
430-PG Robotic Lunar Exploration Program Configuration Management Procedure
430-RQMT Robotic Lunar Exploration Program Mission Assurance Requirements Document
431-ANYS Radiation Analysis for the Lunar Reconnaissance Orbiter
431-PLAN LRO Systems Engineering Management Plan
431-PLAN LRO Contamination Control Plan
431-SPEC Electrical Systems Specification
431-SPEC LRO Mechanical Systems Specification
431-SPEC LRO Thermal Systems Specification
431-SPEC LRO Technical Resource Allocation Specification
431-SPEC LRO Pointing and Alignment Specification
(ALL) LRO Instrument Mechanical Interface Control Documents
(ALL) LRO Spacecraft Component Mechanical Interface Control Documents

3. Lunar Reconnaissance Orbiter (LRO) Mechanical System Level 2 Flow Down Key Requirements
Level 2 Req.
Level 3: Requirements
Concept/Compliance
Paragraph
Requirement
MRD-21
Mission Duration
Mechanical Level 3 Requirements
Paragraph 1.0
The Mechanical System shall be adequately designed and analyzed to support a 14 Month Mission Life.
The Mechanical System shall be designed and analyzed to minimize Thermal/Structural Distortion and maximize Stability
See PM, AM, IM, DPLY Level 4 Specs., Mech. CAD Model, Mech. Assembly Drawing Packages, Analysis Reports
MRD-70 Structural Stability
MRD-71
Fields of View
MRD-73
Accessibility
Paragraph 2.0 & Paragraph 3.0
The Mechanical System shall accommodate the LRO Components/Instruments/Tech Demo and their Requirements , including Optical FOV and Thermal Radiator FOV requirements, as well as pointing and alignment requirements.
The Mechanical System shall accommodate the CRaTER, Diviner, LAMP, LEND, LOLA, & LROC, Instruments and their Requirements per Inst. MICDs
The Mechanical System shall accommodate the Mini-RF Tech Demo and its Requirements per Inst. MICDs
The Mechanical System shall accommodate the Spacecraft Components and their Requirements per MICDs.
MRD-15
Solar Array Tracking
MRD-16
Antenna Tracking
Paragraph 3.0
The Mechanical System shall provide a release, deployment, and articulation system for the deployment and articulation of the Solar Arrays (SADAS).
The Mechanical System shall provide a release, deployment, and articulation system for the deployment and articulation of the High Gain Antenna System (HGADAS)its
See DPLY Level 4 Specs., Mech. CAD Model, Mech. Assembly Drawing Packages, Analysis Reports
MRD-2
Launch Vehicle
MRD-28
Vehicle Interfaces
Paragraph 4.0
The Mechanical System shall be compatible with the DELTA II Launch Vehicles and their requirements per LRO-L/V Mission Specification (TBD Doc. #)
The Mechanical System shall be designed to meet the mechanical requirements of the Delta II L/V as defined in the DELTA II Payload Planners Guides
See LRO-L/V MICD. CAD Model, Mech. Assembly Drawing Packages, Analysis Reports

4. Lunar Reconnaissance Orbiter (LRO) Mechanical System Level 2 Flow Down Key Requirements
Level 2 Req.
Level 3: Requirements
Concept/Compliance
Paragraph
Requirement
MRD-49
Pointing Allocations
Mechanical Level 3 Requirements
Paragraph 5.0
The Mechanical System shall comply with LRO LRO Pointing and Alignment Specification 431-SPEC , Includes Instrument, S/C Components, Solar Array & High Gain Antenna
See PM, AM, IM, DPLY Level 4 Specs., Mech. CAD Model, Mech. Assembly Drawing Packages, Analysis Reports
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Paragraph 8.0
The Mechanical System shall Adopt a Single String approach for the Mechanical / Structural Design and Development and perform adequate analyses and tests to verify design. Selective Redundancy shall be allowed
MRD-76
Support Equipment
Paragraph 11.0
The Mechanical System shall provide the LRO Observatory MGSE.
MRD-69
Contamination Control
Paragraph 14.0
The Mechanical System shall Incorporate Instrument Dry Purge Lines on Orbiter up to T-0 (umbilical break-away line).

5. Lunar Reconnaissance Orbiter (LRO) Mechanical Concept
ADDITIONAL VIEWS
TO FOLLOW

6. 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

7. Lunar Reconnaissance Orbiter (LRO) Mechanical Requirements Summary
Mechanical System is ready to proceed to PDR