P08023: Air Muscle Artificial Limb I
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Grading and Assessment Scheme

Deliverables
Grade Level MSD I MSD II
D Characterization of Current Artificial Limb Design

(1) Developed a method for constructing muscles materials for the current design. Investigated current muscle lengths and materials. Analyzed current forces needed to control hand design. Developed a wiring scheme for the current model.

(2) Gained an understanding of solenoid valves and how they will configure with existing design. Developed a acceptable control algorithm.

(3) Characterized how the air muscles, solenoid valves, and controls of the existing hand model function.

Needed Materials Assessment and Build Instructions

(1) Team has identified all needed materials for the new hand design as well as respected the budget during process planning. Parts have been ordered and the team understands how to assemble/build the new design.

(2) All CADD models of the new design are complete. Design not capable of producing all human hand motions

(3) The control algorithm for the new design is completely finished and ready for implementation

C Characterization and Optimization of Current Artificial Limb Design
  • Grade D Requirements Plus:

(1) Optimal muscle lengths and materials have been identified for the current design. An estimation of all existing forces has been made. Optimized the wiring setup for the current design.

(2) Improved the control algorithm to gain optimal accuracy in the current hand motion. Solenoid valves are configured in such a way to optimize forces and full range of motion of the current limb.

(3) The team has made all necessary improvements on the current hand design in an effort to gain the best performance characteristics and satisfy the customer needs.

Build and Test New Design
  • Grade D Requirements Plus:

(1) At least one finger from the new hand has been constructed and is capable of motion generation. Minimal testing of the device has occurred. Control algorithms are established, but not tested.

(2) Test sequences have been developed that correspond to the customer needs for the project

(3) The new design is capable of all hand motions, but is not scalable. The concept of scalability assumes that changing only dimensions of key design parameters will enable to hand to be constructed at a smaller scale (ie. Half, quarter, etc.) without changing other aspects of the design.

B Characterization, Optimization of Current Artificial Limb Design and Development of new design
  • Grade C Requirements Plus:

(1) Team has identified flaws in the current design and has created several possible prototype designs with input from all 3 sub-teams. Muscle lengths and materials have been established for a new design. The required forces for the new design have been established.

(2) The solenoid valve and control algorithm for the new design have been configured in such a way as to gain the new required Degrees-of-Freedom in the new design. The new design is capable of the full range of human hand motion.

(3) All flaws associated with the current design have been addressed in the new design with an effort to try and satisfy all customer needs.

  • Grade C Requirements Plus:
(1) The team has been able to develop a scalable design for the new hand design and is able to change several parameters in order to adjust the product scale.

(2) The new hand model has been constructed, but not fully tested.

(3) Control algorithm is capable of producing coordinated hand/finger motions.

(4) Testing incomplete; limitations have not been identified.

A Characterization, Optimization of Current Artificial Limb Design and Development of new design. PLUS, Feasibility Demo
  • Grade B Requirements Plus:

(1) Students are able to demonstrate and support with strong evidence the required optimal muscle lengths and materials for the new design.

(2) The control algorithm for the new hand design can be tested and shown to be effective.

(3) The team has the ability demonstrate the performance of the new design by controlling the motions of the current hand model and addressing the improvements that will be expected in MSDII.

Full Scale Demonstrations
  • Grade B Requirements Plus:

(1) The team is able to completely demonstrate the capabilities of the new hand design showing how all the customer design needs have been met.

(2) Control system is fully functional and robust.

(3) New design is fully documented

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