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Next Term's Project ENAE 483/788D Discussion of Next Term • Final design project information • Discussion of final exam • Discussion of grading for group projects • Other useful information © 2013 David L. Akin - All rights reserved http://spacecraft.ssl.umd.edu U N I V E R S I T Y O F Next Term’s Project ENAE 483/788D - Principles of Space Systems Design MARYLAND 1 Notes • Due date for project 5 postponed to time of final exam Monday 12/16 • Slides for Tuesday’s class (Sensors and Actuators) posted to Piazza site • Reminders: – Final exam limited single 8.5”x11” sheet of notes – Bring a calculator – Given honest attempt, final will only be counted if it improves overall grade U N I V E R S I T Y O F Next Term’s Project ENAE 483/788D - Principles of Space Systems Design MARYLAND 2 ENAE 483/788D Final Exam Questions • Orbital mechanics • Rocket performance • Reliability • Life support • Power systems • Structural design • Thermal analysis • Cost analysis • Propulsion systems • Systems engineering U N I V E R S I T Y O F Next Term’s Project ENAE 483/788D - Principles of Space Systems Design MARYLAND 3 Grading Rubrik for Group Projects • 10 - essentially perfect • 9 - excellent • 8 - very good • 7 - good • 6 - okay • 5 - minor deficiencies • 4 - significant deficiencies • 3 or below - major deficiencies U N I V E R S I T Y O F Next Term’s Project ENAE 483/788D - Principles of Space Systems Design MARYLAND 4 Fall Term Project Organization Systems Crew Systems Power, Propulsion, and Loads, Structures, and Avionics and Engineering Thermal Mechanisms Software A1 B1 C1 D1 E1 A2 B2 C2 D2 E2 A3 B3 C3 D3 E3 A4 B4 C4 D4 E4 A5 B5 C5 D5 E5 A6 B6 C6 D6 E6 A7 B7 C7 D7 E7 A8 B8 C8 D8 E8 A9 B9 C9 D9 E9 A10 B10 C10 D10 E10 A11 B11 C11 D11 E11 U N I V E R S I T Y O F Next Term’s Project ENAE 483/788D - Principles of Space Systems Design MARYLAND 5 Grades • Scores for each project will be mailed to each team member • Project scores consist of 0-10 assessment in each of ~10 categories plus comments • Your course grade is made up primarily of your grades from each project, plus the problem set and final (if helpful) U N I V E R S I T Y O F Next Term’s Project ENAE 483/788D - Principles of Space Systems Design MARYLAND 6 Sample of Project Grading Feedback Systems'Architecture 10 7 Considered,'but'minimally'presented Level'1'Requirements 10 8 Didn't'even'include'placeholders'for'other'requirements'(e.g.,'avionics,' comm);'some'strange'choices'on'where'to'put'requirements'(e.g.,' Requirements'Flowdown 10 8 volume'"suitable'for'human'habitation"'as'an'LSM'requirements) Work'Breakdown'Structure 10 8 Like'that'you'make'mockup'operations'into'a'dedicated'specialty Excellent'concept'overall;'could'have'had'more'detail'in'interior'and' Concept'detail'and'feasibility 10 9 systems Good'work'on'overall'images,'use'of'human'images,'provision'of'airlock' and'docking'ports,'dimensioned'drawing!;'minimal'interior'details,'no' CAD'quality 10 9 threeSviews Functional'breakdown/trades 10 9 Good'research'for'SOA'from'prior'systems Draft'concept'of'operations 10 6 Only'implicit'in'LIRP'discussions Text'generally'acceptable'but'smaller'than'necessary;'text'too'small'in' Slide'package'quality 10 7 tables Evidence'of'critical'thought 10 9 good'detail'(e.g.,'airlock'sizing) Bonus'for'extra'effort 4 really'liked'the'CAD Other'positive'comments 2 program'deliverables'chart Other'negative'comments S1 didn't'have'citation'for'image'used'on'page'30 average high low Overall'score 100 85 64.8 85 51 U N I V E R S I T Y O F Next Term’s Project ENAE 483/788D - Principles of Space Systems Design MARYLAND 7 A (Revised) Vision for ENAE484 • Design a cislunar space habitat capable of providing data on long-term spaceflight prior to human Mars missions – Radiation – Effects of hypogravity • Phased approach to utilization – Phase 1: early microgravity – Phase 2: artificial gravity – Phase 3: full lunar/Mars mission simulations • Each phase should take no more than one additional heavy-lift launch U N I V E R S I T Y O F Next Term’s Project ENAE 483/788D - Principles of Space Systems Design MARYLAND 8 Concept of Station Operations • Minimum functional habitat inserted into lunar distant retrograde orbit to support Asteroid Redirect Mission • Decision on moving to alternative point in cislunar space for long-term biological studies (EM L2? leave in DRO?) • Addition of elements to allow rotational partial gravity • 6 month studies of physiological effects of lunar, Mars, other gravity levels • Addition of elements to allow extended autonomy for Mars mission simulation • Performance of full Mars mission (with/without partial gravity en route?) U N I V E R S I T Y O F Next Term’s Project ENAE 483/788D - Principles of Space Systems Design MARYLAND 9 Level 1 Rqmts: Cislunar Habitation • The system shall be capable of operation at any Earth-Moon libration point, low lunar orbit, or a distant retrograde orbit • The system shall support crew for nominal 30 day missions • The system shall be compatible with Orion and commercial crew vehicles • The system shall be designed for resupply to support multiple missions • Phase 1 habitat shall be capable of supporting Asteroid Redirect Mission in lunar DRO U N I V E R S I T Y O F Next Term’s Project ENAE 483/788D - Principles of Space Systems Design MARYLAND 10 L1 Rqmts: Partial Gravity Simulation • The system shall be upgraded to be rotated to provide artificial gravity up to one Earth g • The system shall be upgraded to the extent possible using surplus hardware (e.g., spent upper stages, empty logistics modules) and additional hardware requiring no more than one dedicated HLLV launch • The system shall support up to six-person crews for periods up to six months without resupply U N I V E R S I T Y O F Next Term’s Project ENAE 483/788D - Principles of Space Systems Design MARYLAND 11 L1 Rqmts: Mars Mission Simulation • The system shall be capable of simulating a complete conjunction-type Mars mission (~1000 days) without nominal resupply • The system shall be capable of differing gravitation levels throughout the simulated mission • The system shall provide some means of simulated EVA at Mars gravity during the appropriate parts of the simulation • The system shall be upgraded with additional hardware requiring no more than one dedicated HLLV launch U N I V E R S I T Y O F Next Term’s Project ENAE 483/788D - Principles of Space Systems Design MARYLAND 12 Top-Level WBS for ENAE 484 • Develop a detailed systems design for an evolutionary cislunar habitat program – Microgravity habitat – Variable gravity habitat – Full Mars mission simulation capability • Perform experimental verification of habitat design – 1g simulations – Underwater simulations of 0g, lunar, and Mars conditions U N I V E R S I T Y O F Next Term’s Project ENAE 483/788D - Principles of Space Systems Design MARYLAND 13 Data from Preference Survey • Strongly focused on experimentation - 12 • Mostly focused on experimentation - 19 • Equal experiment and analysis - 3 • Mostly focused on analysis - 7 • Strongly focused on analysis - 1 U N I V E R S I T Y O F Next Term’s Project ENAE 483/788D - Principles of Space Systems Design MARYLAND 14 Expectations for ENAE484 • Single, coherent, integrated project with both analytical and experimental content • Analytical development of systems design is critical for course pedagogy, context for experimentation • Every student is expected to make technical contributions to the project • Grades will also reflect efforts on supporting organization and logistics of project U N I V E R S I T Y O F Next Term’s Project ENAE 483/788D - Principles of Space Systems Design MARYLAND 15 Pedagogical Implications of 483/484 • Senior capstone design sequence – Apply principles of systems engineering to large real- world application – Perform full end-to-end mission architecture and vehicle design analyses – Utilize tools gained from four years of Aerospace Engineering education • Use mission design aspects as context for experimental testing • Take advantage of unique assets and expertise at the University of Maryland U N I V E R S I T Y O F Next Term’s Project ENAE 483/788D - Principles of Space Systems Design MARYLAND 16 Clarke Station (ENAE 484 Spring 2001) U N I V E R S I T Y O F Next Term’s Project ENAE 483/788D - Principles of Space Systems Design MARYLAND 17 Phoenix Station (ENAE484 Spring 2006) U N I V E R S I T Y O F Next Term’s Project ENAE 483/788D - Principles of Space Systems Design MARYLAND 18 Habitat Configuration - Team B1 U N I V E R S I T Y O F Next Term’s Project ENAE 483/788D - Principles of Space Systems Design MARYLAND 19 Habitat Configuration - Team B2 U N I V E R S I T Y O F Next Term’s Project ENAE 483/788D - Principles of Space Systems Design MARYLAND 20 Habitat Configuration - Team B3 U N I V E R S I T Y O F Next Term’s Project ENAE 483/788D - Principles of Space Systems Design MARYLAND 21 Habitat Configuration - Team B4 U N I V E R S I T Y O F Next Term’s Project ENAE 483/788D - Principles of Space Systems Design MARYLAND 22 Habitat Configuration - Team B5 U N I V E R S I T Y O F Next Term’s Project ENAE 483/788D - Principles of Space Systems Design MARYLAND 23 Habitat Configuration - Team B6 U N I V E R S I T Y O F Next Term’s Project ENAE 483/788D - Principles of Space Systems Design MARYLAND 24 Habitat Configuration - Team B7 U N I V E R S I T Y O F Next Term’s Project ENAE 483/788D - Principles of Space Systems Design MARYLAND 25 Habitat Configuration - Team B8 U N I V E R S I T Y O F Next Term’s Project ENAE 483/788D - Principles of Space Systems Design MARYLAND 26
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