1 / 8

Movement Assist System

Movement Assist System. Concept Validation and Feasibility Analysis of chosen design Integration with Other Systems Results and Conclusion. Concept Validation and Feasibility. 1. 2. 4 Main Concepts Feasibility of Crank mechanism Mechanical Advantage versus difficulty of integration

denver
Download Presentation

Movement Assist System

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Movement Assist System • Concept Validation and Feasibility • Analysis of chosen design • Integration with Other Systems • Results and Conclusion

  2. Concept Validation and Feasibility 1 2 • 4 Main Concepts • Feasibility of Crank mechanism • Mechanical Advantage versus difficulty of integration • Chosen Concept 3 4

  3. Comparison and Analysis of Designs • Evaluation of straight line crank mechanism • Showed that the device can provide a mechanical advantage due to crank arm • Main concerns and issues are due to actual construction  binding and sticking in joints of links and moving the crank around two end points of arc • Risk of trying to construct this crank versus the benefit resulted in going with regular crank arm • Gear Sets • Large mechanical advantage • Risks in cost and disengagement • Couldn’t find standard made planetary gear sets with the required footprint  too thick/large • Regular Crank directly coupled to shaft provides lowest risk and best design due to ease of integration and has the benefits of a good mechanical advantage

  4. Analysis of Chosen Design • FBD of Model and EOM • Minimum Torque Required to move system uphill • Key Assumptions • Rolling without slip • Frictionless bearings • Lumped Masses • Torque input from user is constant through Φ • Required Torque to turn generator is lumped into 1 term, Tmotor, and is constant • Starts from Rest

  5. Results With 1.5m Crank

  6. Results with Hand on Wheel Rim

  7. Conclusion of Movement Assist • Crank Design is feasible by itself and should be able to be achieved • Difficulty is in the user activation/disengagement and integration with other systems • Freewheel • Shaft attachment • Integration with braking and ratchet • Based on CR (component of lowest priority) we are putting this system on hold to focus on more critical systems = Hill holder, Gradual Aid, and Energy Recovery

More Related