Jamie Youngmechanical engineering portfolio

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P-51B plane 10-11

bumblebee 6-9

CalSol 4-5

finite element method 22-23

tech talk 20-21

wind turbine 12-13

delta robot 14-17

pencil sharpener 18-19

ceramic business-dog 24-25

ceramic astronaut 26-27

about meI am in the five year MS/BS program at UC Berkeley and will be graduating May 2012 with an MS in mechanical engineering. I worked at Pratt and Whitney Rocketdyne as a mechanical design intern on small propulsion systems for two consecutive summers. I recently finished a semester working as a graduate student instructor teaching 3D modeling and animation using PTC Creo Parametric and 3D Studio Max. My interests include mechanical design, 3D modeling and animation. My hobbies include ceramics, knitting, crocheting, and paper crafting.

CONTACT INFORMATIONJamie Youngjamieyoung@berkeley.edu818-448-3812

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CalSol vehicle shells CFD simulations

CFD Analysis Performed computational fluid dynamics simulations on surface models using FloWorks. Compared coefficient of drag and aerodynamic efficiency between models.

software

SolidWorks

FloWorks

Integrated Canopy CFD results of an integrated canopy model with flat shell body sides. Highest amount of drag present on the vehicle’s leading edge

Bubble CanopyCFD results for a bubble canopy model. The canopy shape results in more drag but is easier to fabricate.

CalSol - Solar Vehicle TeamFall 2008 - Spring 2009

Modeling Created 3D surface models in SolidWorks of solar car shell designs. Models met outer surface area requirements to fit minimum number of solar cells on shell sur-face. Worked with other sub-system teams to determine internal volume requirements to enclose vehicle components.

CalSol TeamTeam Photo (taken Spring 2009) with the Gold Rush vehicle.

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bumblebee the transformer3D model & animation

Modeling Reverse engineered Bumblebee the Transformer from an action figure toy. Collaborated with a team of four over three months to model and assemble the eighty components. Personally modeled twenty individual leg components from the hip to the toes.

Toy Bumblebee This action figure toy model was reverse engineered and modeled for a 3D animation.

software

Pro/Engineer Wildfire

3D Studio Max

Leg AssemblyIndividually modeled components from the hip to the toes. Dimensions measured using calipers.

Assembly Components assembled with translational and rotational constraints on each joint. Inverse kinematics tools were used to simulate the robotic motion of the transformer.

Advanced Engineering Graphics (E128)Spring 2010 with Professor Lieu

Earned the Alexander and Ethel Levens Award for excellence in engineering graphics, computer aided design, 3D

modeling and animation

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project goals

technical communication

illustrate assembly & operation

3D modeling

animation

special effects & lighting

rendering

sound track

scene transitions

Assembly The components were assembled into sub-assemblies and then a final full assembly.

Team Members:Azhar MeyerAndy Hoac

Srikanth Kondragunta

Animation Rendered a 10 - minute animation with multiple scenes and transitions. Animated the assembly of the eighty components and transformation from robot to automobile. Included sound track, lighting, and special effects. Wrote an entertaining storyboard with Bumblebee dancing after the final credits.

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P-51B plane model

Animation Used keys and motion controllers to generate the flying path of the plane. Created an illusion of spinning propellers by using a glass disk. Also generated an illusion of a 3D campus by mapping a 2D photo onto the inside surface of a 3D sphere.

TopMultiple vintage decals added using alpha-maps for transparency. Plane wings modeled using a deformation fit.

software

3D Studio Max

Photoshop

AnimationRendered an animation of the plane model flying an inside loop over campus with a 3D environment and lighting effects.

FrontComputer model compared to images and toy model for accuracy of proportions and scale.

SideFuselage created with a loft and sketches of multiple cross sections along the body.

Surface Model Created a 3D surface model of a vintage P-51B Mustang plane in 3D Studio Max. Applied surface material finishes and insignia details created in Photoshop. Rendered a short animation of the plane flying over Berkeley campus. Individual project =pleted over the course of three weeks.

Advanced Engineering Graphics (E128)Spring 2010 with Professor Lieu

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wind turbine designaerodynamics

Computation Calculated bending and twisting mo-ments on a blade with constant airfoil cross section and varying chord and twist angles. Compared analytical results to real world windmills of similar size.

Positive Angle of AttackAn angle of attack of 5 degrees results in an upward lift. The red areas indicate high pressure.

software

MATLAB

LaTeX

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Stall AngleCalculations at degree increments to check if airfoil stalls at the designed angle of attack. Airfoil stalls when separation point drops below the dotted line value in the plot.

Airfoil Cross SectionPressure distribution of the NREL-S814 airfoil used in the windmill blade design with an angle of attack of 10 degrees.

Negative Angle of AttackWith an angle of attack of -5 de-grees, the resulting lift on the airfoil is downward as represented by the blue area of low pressure.

Zero Angle of AttackSymmetrical pressure distribution of a NACA-0012 airfoil with 0 angle of at-tack has no resulting lift.

Turbine Blade3D plots of final turbine blade design

Aerodynamics (ME163)Fall 2010 with Professor Savas

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0.5NACA 0012 Pressure Distribution of 141 Vortex Panels, α = 0 degrees

Asymmetrical AirfoilA cambered airfoil, such as the NACA-4412, has an upward lift when angle of attack is zero because of the asymmetric airfoil shape.

Coding Wrote code in MATLAB to design a windmill blade. Determined geometric and aerodynamic charac-teristics of blade such as total power and thrust output. Individual project completed over the course of one semester. Compiled results in reports written in LaTeX about airfoil and turbine blade analysis.

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delta robotparallel robotic arm

DesignModeled and drafted all components in Pro/Engineer Wild-fire before machining hardware. Check feasibility of design and range of motion using the CAD model.

software

Arduino

MATLAB

Pro Engineer

MotionSchematic of links and angular positions to relate the position of the effector head to the servo input angle at the top.

Mechatronics (ME102B)Fall 2010 with Professor Kazerooni

HardwareMachined stock material that was ordered from suppliers. Maintained a bill of materials to manage project costs and supplies.

PrototypeHardware was designed for a lightweight and simple model that was easy to assemble.

CAD Model3D model of delta robot used to plan the machining and assembly of hardware.

Kinematics Solved a system of equations using inverse kinematics to relate the angular position of the top parallelogram to the posi-tion of the effector. Prototyped and tested the dynamics equations in MATLAB. Compiled final C++ code using an Arduino micro-con-troller.

Overview Senior design project to prototype a device controlled by an Arduino micro-controller in one semes-ter. Built a parallel robotic arm where the effector end remains parallel to the ground.

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Wii NunchukUse an adapted to separate the output from a Wii Nunchuk control-ler into four signals to be input into the micro-controller.

ControlUsing current location of the robotic arm, translated the output from the Wii Nunchuk to a change of posi-tion of the robot effector head.

ElectromagnetWound wire around a nail to cre-ate a solenoid. Button on the Wii Nunchuk turned current through the solenoid on or off to control an elec-tromagnet to pick up small metallic objects.

Design ExpoA simple game to pick up and drop washers for game points was used to display the delta robot to illustrate the range of motion and responsive-ness to user input.

operationSoftware Taking input from the user through a Wii controller, the micro-controller interpreted the signal to desired coordinate in 3D space and translated that location to a series of output angles on the robotic arm. The micro-controller sent corresponding PWM signals to the 3 servo actuators on the robot.

Team Members:Jennifer Lew

Angelo Del MundoAndy Hoac

Azhar Meyer

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automatic pencil sharpenerplanar machinery

Four Bar LinkagePlanar machinery design to convert the rotational motion from a motor to a one dimensional sliding motion.

software

MATLAB

SolidWorks

3D Studio Max

HardwareAssembled hardware in three portable segments. Four bar linkages machined from stock material and drawer sliders.

TimingSketches and calculations made so that the rotating pencil was in place at the time that the sharpener was in an ideal position to sharpen.

BrainstormsDrew several ideas and possibilities for mechanisms to receiver pencils from a hopper and return sharpened pencils. Planar Machinery (ME130)

Spring 2010 with Professor Yousseffi

3D ModelCreated a 3D Model in Pro/Engineer and short animation in 3D Studio Max illustrating the operation of the device.

Project Designed and built an automatic pencil sharpener that used a four bar mechanism to move a sharpener into place to sharpen a rotating pencil. The pencils were fed into the device and fell through the bottom when finished.

Team Members:Azhar MeyerAndy Hoac

Benson Khai

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tech talknew product developmentProject Investigated why some elderly are not always comfortable using technology and designed a service to address the problem. Tech Talk was de-signed as a simple to use online video chatting and web help service that was accessible with a single click of the desktop icon.

Concept GenerationDrew many concept ideas to address the problem of elderly having trouble using computers. Ranked and scored and the benefits and feasibility of the ideas.

Rapid Prototyping In class rapid prototying of out highest scored concepts from our idea generation phase. Generated models of the “easy to use” device and menus for computer-aid software.

New Product Development (ME110)Spring 2011 with Professor Agoginoproject goals

mission statement

personas

stakeholder interviews

user needs

concept generation

screening & scoring matrices

lessons learned

rapid prototyping

Team Members:Azhar MeyerAndy HoacCindy Wang

Vangie AlvarezKevin Lau

Wizard of Oz PrototypingUsing power point slides to prototype on-screen menus and graphics on a tablet. This prototying method provided users with the look and feel of a device and generated feedback without the costs of creating a functioning prototype.

Wow! That was easy!

Thanks, Tech Talk!

00:05:52I want to learn how to read the news online… I should askTech Talk!!!

Hello, Mr. Herpington!How can I assist you today?

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ProblemDiscovered the need for computer assistance, especially among elderly or people who had not grown up using computer technology.

StudentsRecognized the ability and ease of which students are able to use technology and share their knowledge with others.

ServiceCombined both findings to create Tech Talk where students can help elderly online through a screen sharing and video chatting software.

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codingfinite element method

Testing Compared final FEM solutions to analytical solutions of differential equations. Used best approximation theorem to evalu-ate the potential energy of the solution and assess convergence. Solved simulations for linear, quadratic, and cubic basis functions with varying mesh sizes to find the reasonable combination of com-putation time and solution accuracy.

2D SolutionSolved a thermal conductivity problem for arch with material discontinuity in the center. Applied boundary condition using the penalty method and evaluating surface Jacobian values.

software

MATLAB

3D MeshingCode to mesh a tubular shape with varying number of elements in the radial and angular direction of the cross sections and number of elements along the length of the tube.

2D FEMTested 2D solver with a uniform mesh and continuous arch. Enforced edge and flux boundary conditions with post processing.

2D MeshingCode to mesh a 2D arch shape with variable or uniform meshing with the number of elements in the radial and angular direction as code inputs.

Finite Element Method (ME280)Fall 2011 with Professor Zohdi

Coding Wrote FEM code in MATLAB from scratch to understand the fundamentals and mathematics of the finite element method. Initially wrote a code to solve a 1D differential equation solution of a cantilever bar with linear basis functions progressing to non-linear basis functions and then a 2D FEM solver. Also wrote code to mesh 2D and 3D shape as well as a mesh refinement scheme for 1D.

Compared code perfomance and mount of post-pro-cessing for a conjugate gradient solver versus Gaussian elimination. Used numerical methods such as Gaussian integration and Newton’s method to evaluate and solve the solutions.

Time Dependent DiffusionWrote algorithm to solve a time dependent diffusion problem of a 1D bar with varying reaction coefficients, starting at an initial concentration and reaction taking place until concentration is zero. The problem was solved using forward (explicit) and backward (implicit) Euler numerical methods.

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Wegman business-dogceramic sculptureSculpture Modeled life-size human bust and dog head for a ceramic sculpture inspired by William Wegman’s photography.

SizingCompleted sculpture without glaze. Head and bust modeled separately as two pieces for structural integrity and ease of firing and glazing.

Intro to Ceramics (Practice of Art 14)Spring 2011 with David Linger

Wet ClayDog head sculpture in wet clay before being air dried.

UnderglazeGreenware sculpture with slip underglaze before firing.

FiredHead after being fired once with no glaze applied.

Wet ClayLife-size model originally made oversize to account for shrinkage when fired in the kiln.

GreenwareBust greenware slowly air dried over a week to avoid cracking and fatigue.

UnderglazeLayered multiple layers of under-glaze to give the coat color depth.

GlazingBust with final coat of pigmented glaze on jacket and hand, and clear glaze on shirt and tie.

GlazingCompleted heat with final coat of pigmented glaze (hand mixed) on the fur areas and clear glaze on the eyes and nose before the final fire in the kiln.

FinishedCompleted sculpture after final glaze and kiln firing. Displayed at the 2011 Dirt Show at the Worth Ryder Gallery at UC Berkeley

InspirationWilliam Wegman’s weimaraner models featured in Sesame Street episodes were the inspiration for this sculpture.

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astronaut walking dogsceramic sculpture

Finished Applied clear glaze to all sculpture components. Completed the piece with wire leashes to simulate the astronaut walking the dogs while on display.

Inspiration Sculpted an astronaut walking dogs based on a childhood dream to grow up to be an astronaut and lifetime affinity for canines. Considered several sculpture variations such as including a moon surface or various model scale and sizes. Intro to Ceramics (Practice of Art 14)

Spring 2011 with David Linger

TopCreated separate pieces and joined after partial drying.

LegsSturdy bottom half to sup-port the bulky top half of the astronaut.

BodyBody construction using slabs for a lightweight top half.

DogsDog models simplified as only silhouettes to keep the focus on the astronaut details. Hallowed for rapid drying.

FiringFired sculpture before final coat of clear glaze was applied.

GreenwareDried model with underglaze before firing. Body not underglazed to show natural clay white color after firing

Wet ClayOne foot tall sculpture in progress.

Big PictureSizing the dogs with astronaut for appropriate scale.

3d cad modelsIndividually modeled components based on plastic injection molded parts. Dimensions measured using calipers and