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AUBURN MECH 4240 - Lecture

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MECH4240 – Spring 2012ABET ObjectivesA Structured Design ApproachSlide Number 4The Vee ChartExamples of ArchitecturesSlide Number 7CubeSat ArchitectureSlide Number 9The Key Contributors Who Impact the Process Sponsor InvolvementTechnical Advisor InvolvementOverlord InvolvementOther PeopleOverview of Projects and Project Choices This SemesterNASA LunaboticsUSDA Trencher ProjectSmall Satellite ProjectHigh Speed Gas Gun – Aiming Adjustment and ValvingSlide Number 20Slide Number 21Slide Number 24Project AssignmentsCommentsTeaching Assistant ResponsibilitiesEarly Team TasksGrading Want a COTS Part? E.g. “servo motor”Now When You Order, the Process Is:MECH4240 – Spring 2012 Professor Beale 3418C Wiggins 334-844-3336, [email protected] Office Hours: MWF 11-12 and by Appointment Teaching Assistant: David BranscombABET Objectives The Program Outcomes for the Mechanical Engineering Undergraduate degree are as follows. Graduates will have: • (a) an ability to apply knowledge of mathematics, science, and engineering • (b) an ability to design and conduct experiments, as well as to analyze and interpret data • (c) an ability to design a system, component, or process to meet desired needs within realistic constraints such as economic, environmental, social, political, ethical, health and safety, manufacturability, and sustainability • (d) an ability to function on multidisciplinary teams • (e) an ability to identify, formulate, and solve engineering problems • (f) an understanding of professional and ethical responsibility • (g) an ability to communicate effectively • (h) the broad education necessary to understand the impact of engineering solutions in a global, economic, environmental, and societal context • (i) a recognition of the need for, and an ability to engage in life-long learning • (j) a knowledge of contemporary issues • (k) an ability to use the techniques, skills, and modern engineering tools necessary for engineering practice. • (p1) an ability to apply principles of engineering, basic science, and mathematics (including multivariate calculus and differential equations) to model, analyze, design, and realize physical systems, components or processes. • (p2) an ability to work professionally in both thermal and mechanical systems areasA Structured Design Approach • The Design Space Pathway • The Vee Chart • There are two kinds of designs in this course: – An architectural design or “architecture”, and – An architecture reveals the subsystems and their interfaces, and engineering specifications for each, with requirements that are fed to subsystem engineering design teams. It is a “big picture” design. – detailed design (which includes fully dimensioned CAD drawings created by subsystem engineering teams) • Websites • http://www.eng.auburn.edu/users/bealedg/MECH4240-50/ http://education.ksc.nasa.gov/esmdspacegrant/LunarRegolithExcavatorCourse/index.htmThe Vee Chart The Vee Chart Process Model of the Life CycleExamples of Architectures Architectural Design of a Lunar BaseLike NASA's "First Lunar Outpost" study, LUNOX would only employ expendable spacecraft and rockets although the lunar surface infrastructure is reused. The first mission would deliver enough consumables for a 2-crew, 14-day mission to accomplish setup, repair or maintenance of the surface infrastructure. Future 4-crew missions of up to 45 days would also be feasible, although the required supplies (crew consumables, experiments, liquid hydrogen for the LUNOX system and fuel cells) must be delivered by a separate unmanned cargo flight. LUNOX OutpostCubeSat Architecture Figure 12. Product hierarchy through tier 3, orbiter avionics system only, also from Phase AThe Key Contributors Who Impact the Process Sponsor • The primary stakeholder Technical Advisor • Assists the team • Monitors progress “Overlord” • Assures that accreditation objectives are being met Usually a contributor is a single person. Sometimes the same person can serve as more than one contributor Sometimes two people can work together and serve as a single contributor Expect all three contributors to be present at your midterm and final presentations in MECH4240Sponsor Involvement • The Sponsor is the Primary Stakeholder – i.e. the person who has the most interest in the success of the project • Duties of the Industrial Sponsor – Evaluates (i.e. grades) the technical content and product at midterm and final presentations . The grade is conveyed to the technical advisor to give to the team. – Sometimes the Sponsor will effect the design direction if the project does not appear to be meeting their objectives. – Establishes the “need”, which begins the design process – Pays for the project • Often the Sponsor is a very experienced engineer who KNOWS what is needed from your design and product!Technical Advisor Involvement • Monitors your progress and meets with the group, biweekly or as needed or requested by the team. Grades design notebook. Manages and may contribute to peer reviews. • Serves like a “senior engineer” i.e. someone who has had previous design experience, can answer some technical questions or else guide the student team toward resources to get their questions answered. In some situations the technical advisor may assign task(s) so that the student(s) answer their own question. • Breaks down “walls” (impediments to progress when a team or student is stuck). • The Technical Advisor does not lead the team’s design effort or make assignments – that is the duty of the team manager. • May offer design suggestions (but should not be the source of design innovation). • The technical advisor allows students to explore their own creative ideas, and to perhaps fail should those ideas not pan out (i.e. a “successful failure”). • However, if the student team is not proceeding with a workable solution or is “off on a tangent”, the technical advisor may intercede and redirect the effort.Overlord Involvement • The Overlord makes sure that the ABET (Accreditation Board for Engineering and Technology) objectives are being met. This is primarily achieved by midterm and final reports that follow a specified format and is a well-written technical document. • The Overlord will grade your midterm and final reports, and also individual student presentationsOther People • Vicki Nelms is the


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