Engineering - Myoelectric Transradial Prosthetic Arm

Myoelectric Transradial Prosthetic Arm Project Description Designed and 3-D printed a prototype prosthetic arm that receives an EMG signal from the stump of a transradial amputee and moves the corresponding robotic fingers. Basic set-up of works-like prototype with open hand Solution Methods  Solidworks and OnShape CAD  3-D printed, ABS snap-together fingers  Myoelectric sensors integrate EMG signal from stump to trigger finger movement  Stepper motor powers pulley system to move fingers k Prototype Looks-Like Model Results  Semi-functional looks-like prototype  Functional works-like prototype  Video: http://bit.ly/MyoelectricArm Works-Like prototype with closed fist configuration Renderings of hand CAD model Automated Remote-Control Race Car Manufacturing Manufactured Race Car Prototype Project Description Programmed and operated three Universal Robots 6-axis collaborative robots in conjunction with CNC mills and a CNC lathe to automate the manufacture of remote-controlled race cars. Programmed Robot loading stock into CNC Mill Solution Methods  SolidWorks CAD  Programmed CNC lathe & CNC mill for wheel, chassis, & body manufacture  Programmed Universal Robots 6-axis collaborative robots with conveyer belt for loading/unloading & transfer  Gravity feeders for stock inventory  Rockwell Arena Simulation for process planning Operations Process Plan for parallel processes created with Rockwell Arena Simulation Winning lap on the track during class competion Exploded View of CAD Model Results  Operational automated manufacturing process  Functional prototype  Won class competition for fastest racecar Grip Strength Measuring Device for Monkeys Project Description Macaque Monkey Designed, prototyped, and tested a pneumatic system to test the grip strength of post-stroke macaque monkeys for stroke research at Boston University Medical School. Module Design limitting monkey interaction to squeeze bulb Solution Methods Research lab’s existing housing used for multiple tests. Test monkey reaches in at red arrows. Our module slides into the back Results   Functional prototype Modified version still used in research lab today Functional prototype of full pneumatic system  Pneumatic system constructed with ballistic nylon squeeze bulb for durability  Base pressure could be set from an accumulator tank and compared to pressure monkey could squeeze  Retro-fit into lab’s test housing, aluminum wall prevents monkey from interfering with system  Solidworks for CAD, GibbsCAM for CAM Automated Flying Cutoff Saw Project Description Design flying cutoff saw system for continuously extruded aluminum pipe, adjustable for length (3-5ft) and diameter (1-3 inches), and automatically package pipes. CAD Model Rendering of Full Design Solution Methods  Solidworks CAD  Double saw approach used to be able to cut one piece while the other saw is travelling back to start point  Circular saw travels along linear drive at same speed as pipe, cuts into pipe moved by second, perpendicular linear drive  Pipe moved continuously with friction drives  Pipe drops onto gravity rollers & delivered into box, which is shaken to arrange pipes CAD Renderings of Friction Drive, Linear Drive System, and Gravity Rollers CAD Rendering of Circular Saw with Lubricant Results  CAD model design  Praised by instructor for high efficiency of double saw approach  Presentation: http://bit.ly/FlyingSaw Nanomedicine Cancer Therapy Research Review Project Description Research review of light-based nanomedicine cancer therapy treatments, comparing Photothermal and Photodynamic therapy. Slide from Presentation detailing Photodynamic Therapy [1][2]* Solution Methods   Comprehensive research of Photothermal and Photodynamic Cancer therapy - 22 articles reviewed Review of manufacturability and future prospects of these therapies, along with methods to improve their effectiveness. Figure from Report detailing factors in nanoparticle uptake [3]* Results  Final presentation before peers: http://bit.ly/NanoCancerTherapy  15-Page Report: http://bit.ly/NanoReport  Praised as best presentation in the class by course instructor. Slide from Presentation detailing Photothermal Therapy [4]* *Images taken from research articles reviewed. Please see back of portfolio for proper references TunePlay Smartphone App Project Description Designed a smartphone music-memory game app that tested a user’s ability to play back a tune that the app played for them. Start Screen Solution Methods     Play Screen Coded in Java using Android Studio Object Oriented Programming utilized Each button corresponds to a musical note (piano, guitar, or drums) Player hears tune, needs to play it back correctly to move on Results  Successful working Android app  10 different levels  Easy-to-use user interface  Included instructions  How-to-Play Video: http://bit.ly/TunePlay Level-Passed Screen Game Over Screen Smartphone Projector Project Description Designed, machined & assembled a prototype of a projector for a smartphone. Photograph of completed, functional smartphone projector Solution Methods CAD model in AutoDesk Inventor Results  Successful working prototype  Ability to clearly view episode of favorite show in darkened room Drawings of Smartphone Projector, demonstrating sliding drawer design to focus image  Sliding drawer inside box adjusts distance between smartphone and magnifying lens to focus image  Screen flipped on phone for correct image orientation  Machined using CNC Mill & Lathe  AutoDesk Inventor for CAD  GibbsCAM for CAM Carabiner Pocket Knife Project Description Design simple, yet unique product & carry through all testing phases (EVT, DVT, PVT), design for manufacture, & optimize so ready for mass production scale, at < $10/unit at final Trimetric view of carabiner pocket knife production cost. We made a combination of a Solution Methods carabiner and a pocket knife, with a fold-out  Liner lock to lock knife in place knife blade and screwdriver.  Combination of slot screw driver as part of carabiner clip, held in place by a magnet.  Optimized shape of carabiner for ease of manufacturing in high volumes on CNC mill  Liner lock cut using wire EDM Carabiner base designed for manufacture – several  Optional laser etching and pad pieces could be milled with same toolpath printing for future improvements Results  CAD in OnShape, CAM in GibbsCAM,  Functional Prototype passed EVT testing FEA in SolidWorks (see next page)  Currently in Design Validation Testing Carabiner prototype in closed and open state Screwdriver slides into slot to prevent excessive torque on pin Liner lock snaps into place to keep knife open (L) and holds against blade with friction to keep it closed (R) Simulations COMSOL Fluid Dynamics simulation of a disk rotating in a tank, depicting turbulent viscosity and velocity field plots SolidWorks FEA depicting stress and deformation in the body of a carabiner with applied axial load COMSOL Thermal simulation of boiling egg COMSOL Electrostatic simulation of a capacitor and the air in its surroundings. The bottom image highlights the fringing electric field effects.