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Dianne Goodwin, MEBME President/Rehab Engineer Nicholas Lee, BSME Partner/Design Engineer Minneapolis, MN DESIGN AND DEVELOPMENT PROCESS ACCESSIBLE, AFFORDABLE,

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Presentation on theme: "Dianne Goodwin, MEBME President/Rehab Engineer Nicholas Lee, BSME Partner/Design Engineer Minneapolis, MN DESIGN AND DEVELOPMENT PROCESS ACCESSIBLE, AFFORDABLE,"— Presentation transcript:

1 Dianne Goodwin, MEBME President/Rehab Engineer Nicholas Lee, BSME Partner/Design Engineer Minneapolis, MN DESIGN AND DEVELOPMENT PROCESS ACCESSIBLE, AFFORDABLE, AND MODULAR ROBOTICS RESNA 2014 Indianapolis, IN

2 Design and Development Process Need: Problem needs solving Identify the Need Involve real people and end users Design and Development Process Design Goals and Specifications Prototype Development (electronics/mechanical) Design for Manufacturing (DFM) Best materials and methods of Manufacture Cost of Production (NRE and Piece parts) RESNA 2014 Indianapolis, IN

3 Needs and Usability Design DFM The 3 areas impact each other RESNA 2014 Indianapolis, IN

4 Figure 2. Interdependence of Development Considerations Needs & Usability Product Design Manufac- turing Needs: end users and teamsxx End user preferencesxx Ease of use/Accessibilityxx Product Costxxx Compatibility with equipmentxxx Look and feelxxx Preferencesxx Manufacturability xx Ease of assembly xx Manufac. costs (parts, tooling) xx Material options xx Safetyxxx RESNA 2014 Indianapolis, IN

5 Need: Independent access and positioning People with significant disabilities (no UE) reliant on others Independent access devices, electronics, speech, water, controls AND to move/position things independently move it where they need it when they want it easily, safely and efficiently Across environments—bed, w/c, table RESNA 2014 Indianapolis, IN

6 Review Existing Technology Static mounts Daessy, Rehadapt, CJT Movable with some extremity use Mount’n Mover Daessy SwingAway Wheelchair-mounted Robotic Arms Focus on reaching and grasping Move by alternate means (ie, joystick, switch) Load capacity is <3.5 pounds RESNA 2014 Indianapolis, IN

7 Wheelchair-mounted Robotic Arm JACO Holds 1 kg (2.2 pounds ) Reach 70 cm (27.5 in) Speed: 20 cm/s (8 in/s) Weight: 5 Kg (6 pounds) $38-50,000 RESNA 2014 Indianapolis, IN

8 iArm (formerly Manus) iArm Holds 1.5 kg (3.3 lbs) Reach 90 cm (35.4 in) Speed: 15 cm/s (6 in/s) Weight: 9 Kg (20 lbs) $34,000-?? RESNA 2014 Indianapolis, IN

9 Product concept: Modular Power Mount Power mount Support and reposition devices NOT grasping and reaching Accessible controls Single or Multi-joints Simple and functional RESNA 2014 Indianapolis, IN

10 Design goals: Accessible, Modular, Affordable and Safe Support up to 15 lbs, extended 15 inches Accessible and easy to operate A wide range of control options Memory positions (easy to program) Fine adjustments also accessible Modular (hybrid/system/build your own) Single Joint—Tilt or Rotation Multi-jointed Height Adjustment module RESNA 2014 Indianapolis, IN

11 Sometimes Less is More Single Joint/Actuator Tilt (Hybrid) SMART Joint Rotation Lift Operated by Single switch Two switches Joystick (via ECU) SMART joint RESNA 2014 Indianapolis, IN

12 Sometimes More is More Multi-joint Systems Programmable Up to 12 Sweet Spots Levels (devices, environments, people) Individual joint adjustments Many input options Joystick, switches, smart devices RESNA 2014 Indianapolis, IN

13 Original concept: one arm length Big new idea: SMART Joint SMART Joint = Building block Joint + Extrusion opens up options Single Joint version to create hybrids Joint in different orientations Horizontal, creates Rotation On its side, creates a Tilt Joint + Extrusions (of different lengths) = different arm lengths RESNA 2014 Indianapolis, IN

14 Lego-land: so many options… RESNA 2014 Indianapolis, IN

15 So many details to decide Implications: Design, Usability, Manufacturing Length of arm How many options? Joint Housing Joint Cap Joint Release Connections Inputs Wiring harnesses Power and data Worm Gear Locks w/o power How it Works Programming Feedback Control Input options Display Graphics RESNA 2014 Indianapolis, IN

16 Dizzy Di and the Wonder Guy How fast should it move? How will it attach to a wheelchair? How will people control it? How should it work? I wonder what forces it needs to withstand? I wonder how long the arm should be? I wonder What kind of people will use it? What material should we use? RESNA 2014 Indianapolis, IN

17 Usability considerations User Interfaces, Input and feedback End Cap Input jack(s) Touch control Control Pad/Display Touch, input jacks, wireless Feedback Movement Visual (joints glow) Auditory RESNA 2014 Indianapolis, IN

18 What it Does and How it’s Done End Cap and Control/Display RESNA 2014 Indianapolis, IN

19 Development Methods Mechanical and Electronics vary 3D CAD and Printing Simulation Software to demo Cannot look at things in isolation Concurrent focus on: Technical design and feasibility Accessibility and Usability Manufacturability Areas overlap and influence one another RESNA 2014 Indianapolis, IN

20 End User and their Team Needs End User preferences Ease of Use Accessibility Product Cost Compatibility with other equipment Look and feel Safety RESNA 2014 Indianapolis, IN

21 Questions we’re asking What will they use this for? Who might use it? How would they access it? What are they doing now? How do they want it to work? How much would they pay? Who (person, voc rehab, insurance) would pay? What controls do they want to use? What kind of user interface makes sense? How will the UI operate? How big can it be? How long is the “arm”? Do they want a Single joint, or Multiple joints? RESNA 2014 Indianapolis, IN

22 Product design considerations Functionality Utility Ease of Use Durability Safety Aesthetics Size and weight Compatibility Tech support Assembly Electronics Loads Impact Failure modes Environments Manufacturability RESNA 2014 Indianapolis, IN

23 Simplify Product Limit choices Interface Easy to use Intuitive (relate to familiar products) Manufacturing Reduce parts (Unibody and worm carriage) Easier to assemble Use one part in multiple ways RESNA 2014 Indianapolis, IN

24 One part, Multi-purpose Extrusion Arms Battery pack Plate Mounting Plate Bottom Plate Hole pattern Existing MM parts Extrusion Compatibility increases flexibility RESNA 2014 Indianapolis, IN

25 Manufacturing influences Design Ex: Joint Housing Idea: from tour of an Investment Cast facility Clam shell (2 part) evolved into UniBody Part reduction 2>1; no screws needed Fewer seams for water Minimize part count Combine parts Less assembly Have each part “do more” RESNA 2014 Indianapolis, IN

26 Worm’s turn: Investment Casting Carriage: 6 parts to 1 No assembly required Easy assembly of motor/worm More rigid Multi-functional Motor attachment Release feature/gear mesh adjustment Investment casting Tooling cost

27 Joint Release Mechanism RESNA 2014 Indianapolis, IN

28 Iterative Design Process RESNA 2014 Indianapolis, IN

29 Joint Release—Multi-functional Release for Safely and easily move the mount Without power Release for Ease of programming Perhaps for Training the arm to follow a path RESNA 2014 Indianapolis, IN

30 Ideal Design Evolution Needs and Usability Design DFM Key features—design and evaluate for: Usability Manufacturability Manufacturing/design Consider alternatives Cost implications (tooling/parts) End result Affordable product That meets their needs People can do what they want—independently! RESNA 2014 Indianapolis, IN

31 Questions? Thank you! Your opinions and ideas are Welcome Keep in touch Thank YOU! To NIH/NICHD!!! Research supported by NIH/NICHHD SBIR Award Number R44HD RESNA 2014 Indianapolis, IN


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