Article presentation in CIRP Design 2014 Milan - Italy Work developed in G-SCOP Laboratory - Grenoble - France

1. Design for Disability: integration of human factor for the design of an
electro-mechanical drum stick system
Justine Coton, Marcel Gois, Julien Veytizou, Guillaume Thomann

2. This work is about:
- Educational issues of disabled children who have difficulty of manipulating objects
- Music activities allowed by assistive technology
It was made in:
- G-SCOP Laboratory (Grenoble – INP)
- In association with AE2M (Ergonomic Adaptation of the Musical Material)
2
Introduction
Figure : Logo AE2M

3. Dilemma and paradoxes
- What starts technology progress
3
Background
Well-defined needs
Search solutions Search Users (clients)
Technological Development
USER CENTERED TECHNO CENTRED
RISK
Focus on obsolete technology,
unusable or too expensive
RISK
To propose solutions for imaginary
or non-priority needs
Create link
between these
teams of designers

4. Dilemma and paradoxes
- Approaches to design assistive technology products
4
Background
Mass production
Economies of scale
Universalist Specialized
Small batches
Tailored production
Approaches
Bases
Inexpensive
standard products
Expensive
customized
products
Results

5. - User centered design approach
- Concrete situation of musical instrument (percussion) not accessible
- Developed tools and primary solutions to manufacture adapted products
THE A2EM WORKING SCHEMA
5
Methodology
ENGINEER MUSICIANS
PARAMEDICAL
THE DISABLED CHILDREN

6. THE ELECTROMECHANICAL DRUMSTICK (MEM)
General Scheme
- The drumstick (DS) is generated with a spin
- Force is produced by an electromagnet (EM)
- Spring (S) permits the return in initial position
6
Product development
EM
S
DS

7. THE ELECTROMECHANICAL DRUMSTICK (MEM)
Product Architecture (3D CAD and 3D printing)
- Pin part (red) to fix and manage drumstick movement
- Housing of system (blue)
- Electromagnet movement (gray)
- Electronic board
7
Product development

8. Product development
8
CLASSICAL MACHINING
Good mechanical and
aesthetical pieces
It is a long and expensive
process
Z-PRINTER
It consists on solidify plaster
powder using a binder
There is shape flexibility, but
little product resistance
FUSED DEPOSITION MODELLING
Machine low-cost
A plastic string (ABS…) is heated
and deposed
FUSED DEPOSITION MODELLING
Professional Machine with better
mechanical properties
A plastic string (ABS…) is heated
and deposed
THE ELECTROMECHANICAL DRUMSTICK (MEM)
Choice of Housing Production Technology

9. Product development
9
THE ELECTROMECHANICAL DRUMSTICK (MEM)
Electronic Control Board
- Located in the housing, it controls the electromagnet
- 10 different modes (tempo, rhythm elements, etc.)

10. Product development
10
THE ELECTROMECHANICAL DRUMSTICK (MEM)
Human interface
- The choice made by the user (allowed by standardized connection)

11. Product development
11
THE ELECTROMECHANICAL DRUMSTICK (MEM)
Complete system

12. Contributions
- Proposition of a product with several personalization possibilities
- Reflections about design methodology research (human factor in design and customization)
- Social integration of children with disability
- Cost reductions: 280€ to 245€ with 3D-manufacture process
Future perspectives
- Work with product development process perspective toward AT business viability
- Continue the technical research about product adapting and development
- Increase the network worldwide and work with open development philosophy
12
Conclusion

13. Thank you for your attention
Marcel Gois
marcel.gois@g-scop.grenoble-inp.fr