06_621s03expdesign

06_621s03expdesign - Experimental Design 16.621 Elements of...

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Experimental Design 16.621
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Elements of Designing an Experiment • Goal is to assess your hypothesis The main thing is to keep the main thing the main thing - [Tom Curran, AFRL] • The design goal for your experiment is to achieve your objective and satisfy your success criteria. Your HOS are the touchstones for your experimental design .
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SOME FRAMING QUESTIONS Once the HOS is set we need to define in depth the path to get there • Need to think through the whole process on an end-to-end basis • Need to identify the hard parts • Need to identify the key milestones (“mid term exams”) • This will include (at some level) questions such as: - What will we do? - Why will we do it? - Where will we do it? - Who will help us? - How will we do it? - How well do we have to do it? - When will we do it?
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Project Specific Applications of these Questions What is the best overall approach to achieve my objective? – e.g., should I test children’s car seats in the lab or in actual airplane environment? What are my choices of facilities? – e.g., should I use a water tunnel or a wind tunnel to determine the performance of a split-tip keel? How will I measure my independent variables? – e.g., Should I measure rotational speed of my airspeed indicator with a stroboscope or a shaft encoder?
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Observations About Design • Design is an inductive process. • Ways to learn design – Study past designs that have been successful and extract patterns • Look at the online models – Work with a “master” designer • Involve your advisor – Do it yourself and receive feedback • Basically this is the 16.621 process
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This note was uploaded on 11/08/2011 for the course AERO 16.61 taught by Professor Earlmurman during the Spring '03 term at MIT.

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06_621s03expdesign - Experimental Design 16.621 Elements of...

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