1. Classic Rocker Team 7 Thomas Dabrowski Sarah Philo Adam Rauwerdink

2. Outline Introduction Specifications Physical Challenges Market Analysis Optimal Design Budget Timeline Conclusion

3. Introduction Self-rocking legless rocker Passionworks Studio in Athens, Ohio NSF funded Dr. Hallowell at Ohio University “Classic Rocker” will provide a smooth, comfortable rocking motion activated by a simple switch Audio system will also be included

4. Physical Challenges Users have wide array of physical and mental limitations Cerebral palsy, Multiple sclerosis, varying levels of paralysis Coordination Muscle control Mental abilities and attentiveness Seizures of varying intensity (some CP)

5. Specifications Rocking mechanism Comfortable speed Comfortable range of motion Does not require permanent attachment to floor Control Simple power switch for user Control of audio by user Caretaker has master control for all power and for music track and volume All easily accessible and with high ease of use Audio Internal speakers Input from CD player accessible to caretaker

6. Market Analysis Electronic and Mechanical Assistant Technologies – Motorized Rocking Chair NSF Project – Rensselaer Polytechnic Institute – 1989 – “The Mechanical Rocking System”

7. Market Analysis ( con’d) Various non-mechanized legless rockers, available at many major retailers (Wal-Mart, Target, etc) Numerous patents granted for mechanized rocking systems

8. Optimal Design

9. Frame Aluminum external and internal frames External base Hinge Mechanism Internal chair reinforcements

10. Power Mean Well SE-600-12 Enclosed Power Supply Supplies 600-Watts of Power @ +12V from 0-50A Compensates for both the audio system and gearmotor running at full draw without straining Actual power supply will provide a lower wattage after CD player power tests are completed

11. Motor and Linkage Dayton 12VDC gearmotor #1L474 6.5 amps full draw 150 in-lb torque (41needed) Geared to 20 RPM Cam and linkage system Cam 1.6” diameter Linkage bar 5” long Creates chair displacement of 7” at top Moving parts covered for safety

12. Controls 2 Sets – User and Caretaker User - interchangeable switches for activation of rocking motion and mute function for audio Squish switch Touch switch Caretaker – Master power to all chair components, plus control of CD player

13. Audio Boss Audio CD-3020 CD player installed in tower behind chair MA Audio HK-35 Speakers inside headrest of chair

14. Control Schematic

15. Budget Rest of budget will be used for “error analysis”

16. Timeline

17. Timeline (con’d)

18. Conclusion Analysis of forces with scale models and Working Model 2D software Preliminary analysis of power needs Located optimal audio and electrical equipment Frame construction options (Weld or 80/20 Inc.)

19. Prior Designs Design III Design I Design II

20. Appendix Related Patent Numbers 6,899,393 6,695,799 6,412,867 6,318,803 6,152,529

21. Appendix Load vs. Input Voltage for SE-600-12 Power Supply

22. Appendix