2. Table of Contents
• Professional Summary………………………………………………………………………………………3
• Project Example……………………………………………………………………………………………….4
• Designing the Buoy…………………………………………………………………………………………………..4
• Understanding the Sensor…………………………………………………………………………………………5
• Drawings……………………………………………………………………………………………………………………6
• Building and Testing…………………………………………………………………………………………………7
• Field Testing the Prototype……………………………………………………………………………….....8
• Conclusion………………………………………………………………………………………………………9
• Contact Information……………………………………………………………………………………..10
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3. Professional Summary
• Hardworking Mechanical Engineering student at Northeastern University with 18
months of diverse co-op experience. Recognized for being a quick learner, well
organized, and creative thinker.
• GE Aviation, Turboshaft/Turboprop Department– Provided an interesting perspective in
engineering on the product support side. Got to work with customers who were having
technical issues with GE products. Other tasks include keeping track of hardware returns,
action item lists and made documentation changes to engineering manuals.
• Qinetiq North America, Technology Solutions Group- Worked on commercial and government
project. Performed part procurement and data analysis for steam generator cleaning robot.
Designed wave motion sensing buoy from start to finish, used SolidWorks to create parts and
tested prototype out on the field.
• GE Aviation, Product Engineering Center- Performed statistical process control analysis on
GEnx engine line to improve compressor functionality. Conducted cost out analysis on
different engine parts. Other projects include managing GE Engineering project database and
directing polo shirt sale for community service fund.
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4. Project Example: Designing the Buoy
• Objective: To design a motion sensing buoy that can provide data to help quantify radio
possibilities to place inside the buoy for the final product that can communicate with a
satellite.
• Execution: The process began with making buoy components using SolidWorks. The
SolidWorks model provides approximate physical values (center of mass, total weight, etc.) to
help predict what would happen to the buoy when placed in the water.
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3D Modeled Part
3D Modeled Assembly
Lessons Learned: Developed proper SolidWorks
etiquette, where it is preferable to design parts in
certain ways to make it easier to go back in
change them. Learned that when designing
models, parts may change constantly through
discussion with engineers as insight to optimal
design is gained overtime.
5. Understanding the Sensor
• Objective: Figure out how to use a motion
sensor and learn its limitations and work
around them. Also ultimately use the sensor
to figure out displacement, as it is does not
provide direct results for it.
• Execution: Purchased a motion sensor and
played around with it to see what it can and
cannot do. Performed multiple tests in
controlled environments to figure out
method to derive displacements from
accelerometer and gyroscope data.
• Lessons Learned: Never underestimate the
task at hand as figuring out a method to
deriving displacement proved to be very
challenging.
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Motion Sensor Interface
6. Drawings
• Objective: To make proper engineering drawings that would be sent to
manufacturers to create parts for assembly.
• Execution: From the SolidWorks model, I made drawings for each part and
the assembly. Afterwards sent the drawings to manufacturers to acquire
physical parts.
• Lessons Learned: Refined my drawings skills and learned new
labelling techniques for better dimension clarity. Interaction
with the manufacturer provided insight on how parts are
made and acquired knowledge on how important it is to be
selective who makes specific parts for budget and quality
purposes.
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Part Drawing
Assembly Drawing
7. Building and Testing
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Assembled Buoy
In House Testing
Objective: To assemble the buoy and perform in-house testing to observe
the buoy and make any possible adjustments for more desirable
performance
Execution: Acquired all of the parts from manufacturers and assembled the
buoy with the sensor inside. Used a vacuum pump to make sure the buoy
can hold a vacuum to prevent water from leaking inside. Measured the
weight and added weight accordingly using the theoretical buoyancy data
to make sure the buoy floats approximately half way. Then tested the buoy
in a tub of water while recording motion data from the sensor on a laptop.
Lessons Learned: During the assembly
process, certain hard to reach parts should
have been altered for better ease of
assembly, but work around were made
mitigate the assembly problem.
8. Field Testing the Prototype
• Objective: To test the motion buoy and interpret the results
from the motion sensor.
• Execution: Went out to a large body of water and tested out
the buoy. Tested two buoy configurations of the buoy, one with
more weight hanging from the bottom, and one with no
weight. Recorded the motion data for each and interpreted the
data back in the office.
• Lessons Learned: Should have thought of a way to place the buoy in and
out of the water more easily as it was awkward to do so with just human
hands. Even after testing and evaluation of the prototype, the overall
design in the end has to be moderately altered as more optimal designs
were brought up, helping me acquire the mindset that engineering
process never ends as designs can always be improved.
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Video of Test 1
Video of Test 2
9. Conclusion
• Designing the Buoy - helped me develop the proper SolidWorks etiquette, making it
retractable for others to follow
• Understanding the Sensor - provided a good reminder to never underestimate the task
at hand
• Drawings - is a very important communication step between manufacturers and I as it
requires proper interpretation of the parts at hand
• Building and Testing - is another important communication step between myself and
those building it and learned how this process can be approved in the design stage
• Field Testing the Prototype - gave me insight on how testing in house vs in the field are
two completely different things and how new problems arrive during the field testing
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10. Contact Information
• Address:
• David Guan
• 402 Rindge Ave
• Cambridge, MA 02140
• Email: david.guan1992@gmail.com
• Phone: 617-595-1399
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