Transferring from Chabot to UC Berkeley. Robert Moore May 5, 2014. Why Engineering?. Grew up around cars, always fascinated with anything with an engine Became interested in metal fabrication Graduated from James Logan in 2002
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Transferring from Chabot to UC Berkeley Robert Moore May 5, 2014
Why Engineering? • Grew up around cars, always fascinated with anything with an engine • Became interested in metal fabrication • Graduated from James Logan in 2002 • Took welding and machining classes in high school and at Chabot, as well as GE • Started at Math 55 at Chabot • Went to work as a machinist for 2 years
Path to Transferring • Decided to go back to school to pursue Engineering • Started back at Chabot full time in Fall 2006 • Worked ~20 hours / week while going to school • Took 3 years to complete coursework at Chabot
Chabot Class Schedule Final GPA: 3.52
Advice for Students • Work to learn all you can in your math classes, math is essential in all future classes • Take advantage of the help offered by professors • Master study skills while at Chabot • Become skilled in Matlab
Differences between Chabot and Cal • Pace at Cal is twice as fast as Chabot • Large Classes • Test are harder and very time sensitive Biggest Surprises: • Not everyone at Cal is a genius • A student that started at Cal doesn’t have an advantage
Mechanical Engineering Curriculum All can be completed at Chabot College
UC Berkeley Schedule GPA at graduation: 3.587
Student Groups at CAL • Super high Mileage Vehicle • CalSol • FSAE
Senior Design Project • Project Goal: • Build CNC plasma cutter table using existing hypertherm plasma cutter. • Fulfill requirements for: • Mechatronics design course (ME102B) • Microprocessor-based design of mechanical systems (ME135)
CNC Plasma Cutter - requirements • Requirements • Cut 4’ x 4’ sheet • Must be semi-portable • Cost not to exceed $2000 • Maximum Cutting speed 385 in/min. • Positioning accuracy to 0.005” • Cutting tip speed must be held constant for best cutting finish
CNC Plasma Cutter – Design • Gantry Design Chosen • Provided minimum footprint for amount of travel. • Linear bearings chosen as guide ways. • Drive System • Rack and Pinion drive for X and Y chosen. • Ball screw drive for Z axis.
CNC plasma cutter – build • All parts machined and fabricated by team. • Steel Frame weldment built at my shop. • CNC work done at ProFAB
CNC plasma cutter - results • Project won best design award for spring 2011.
Ekso Bionics (Formerly Berkeley Bionics) • First job out of CAL, hired October 2011 • Designed improvements for Ekso robotic suit • Worked on grant funded by DARPA for advanced hydraulic pump research
Hyd pump & test stand • Project Overview • DARPA grant funded project to build low-noise high efficiency mobile hydraulic system. • Worked with subcontractor to design hydraulic pump. All actuation designed in house. • Project required a test stand to be designed to evaluate performance of new pumps versus existing technology.
Test Stand - Requirements • Test stand must run two pumps simultaneously • Must record enough data to calculate pump efficiency ( mechanical, volumetric and overall) • Must be easily adapted to various pumps • Hydraulic loading • Constant load for efficiency experiments • Dynamic load to simulate leg actuation on HULC device.
Test stand - design • Measurements Required: • P1a, P2a, P1b, P2b - Pressure • Qa, Qb – Flow rate • ω – Shaft speed • Τact – Input torque • Fluid Temperature • Displacement Position
Test stand - design • Breadboard platforms created to allow maximum versatility. • Static load provided by needle valve flowing through a flow-meter
Test stand - design • Dynamic load designed to replicate inertia of leg from HULC. • Inverted pendulum chosen as inertial load. • Features adjustable inertia as well as a separate damping cylinder to provide external loading.
Test stand – results on existing pump • Existing gear pump results from test stand
ZEE.AERO • Hired November 2013 • Working on Power and Propulsion team From Gizmag.com
Any Questions? • e-mail me any questions: firstname.lastname@example.org Information: fsae.berkeley.edu me.berkeley.edu coe.berkeley.edu