MRI Compatible Lower Leg Exerciser Client Alejandro Roldan Advisor Naomi Chesler Team Deborah Yagow Leader Amy Lenz BSAC Colleen Farrell Communicator Val Maharaj BWIG Week 13 November 27 December 3 Problem Statement The goal of this project is to design and construct a lower leg exerciser that is compatible with MR imaging and echocardiography to be used during cardiopulmonary research on pulmonary hypertension patients and healthy volunteers The device must have repeatable loads that can be measured and displayed to the patient via biofeedback Last Week s Goals Finish ultrasound testing with Claudia and compile data Finish workload calculations Finish SolidWorks and poster Present on Friday Summary of Accomplishments Construction additions tweaked Ran another Ultrasound test with Claudia Completed poster Completed SolidWorks schematic and FEA analysis Met with Professor Bonazza This Week s Goals Replace problem bracket screws Finish final report Complete notebooks MRI test device with Oliver on Wednesday Difficulties During ultrasound testing meeting with Alejandro and device transportation we definitely saw areas on our device that will be improved and strengthened next semester when we are able to buy more materials The only information on our fan blade we were able to obtain from the manufacturer are plots of Airflow CFM Efficiency CFM Watt input and Current Draw Amps vs Static Pressure In H20 After talking with EMA aerodynamics Prof Bonazza he said there is really no equation to properly approximate our system He said if we could find the torque coefficient of our fan we d be all set since we know the equations to get power from that We haven t yet found the measurement tools available in order to experimentally measure our airflow we will search further and contact more professors in different departments to try to get that information in the final report Next semester we will simply have to replace the fan with one that has a full spec sheet or switch to a braking resistance system For presentation we will set out the methodology of how we would go about determining workload and how it is incremental for different RPM During our final meeting next week we ll be happy to talk about this more in depth Activities 11 28 09 12 01 09 12 03 09 11 27 09 11 28 09 12 01 09 12 02 09 12 03 09 11 27 09 11 30 09 11 30 09 12 03 09 12 03 09 11 30 09 11 30 09 12 02 09 Deborah Amy Team Val Colleen Deborah Val Amy Deb Colleen Deb Val Deb Amy Colleen Emails to professors and workload research Met with EMA Aerodynamics Prof Bonazza Progress report Stress calculations Notebook updates and workload research Exercise data trials FEA and poster meeting Construction and final poster editing Presentation practice and poster editing Purchased pedal toe clip Compiled exercise data Poster making Poster printing and notebook updates Cancelled meeting with Dr Reeder WIMR Ultrasound testing at hospital Phlange construction and metronome trials Meeting with Alejandro 2 hrs 1 hr 0 5 hr 4 hrs 4 hrs 7 hrs 2 hrs 5 hrs 0 5 hr 0 75 hr 1 hr 2 5 hrs 1 hr 0 75 hr 2 hrs 0 75 hr Previous Project Hours Colleen 30 25 Val 36 25 Amy 27 75 Deb 37 25 Team 42 75 Total 172 25 Project Timeline Week ending September Task 18 Product Development Background Research Brainstorm Decision matrix First Prototype Construction Testing Deliverables due PDS Prelim Report Poster Presentation Evals notebooks 25 October 2 9 16 November 21 30 6 13 20 December 27 4 9
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