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Career PortfolioBy David Guan

Northeastern UniversityB.S.M.E 2016

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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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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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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.

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.

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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.

Motion Sensor Interface

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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.

Part Drawing

Assembly Drawing

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Building and Testing

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.

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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.

Video of Test 1

Video of Test 2

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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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Contact Information• Address: • David Guan• 402 Rindge Ave• Cambridge, MA 02140

• Email: david.guan1992@gmail.com• Phone: 617-595-1399