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Team #17 Dynamic Muscle Recorder Client: Dr. Enderle Group Members: Michael Petrowicz James Porteus Farrukh Rahman.

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Presentation on theme: "Team #17 Dynamic Muscle Recorder Client: Dr. Enderle Group Members: Michael Petrowicz James Porteus Farrukh Rahman."— Presentation transcript:

1 Team #17 Dynamic Muscle Recorder Client: Dr. Enderle Group Members: Michael Petrowicz James Porteus Farrukh Rahman

2 Presentation Outline Client and Objective Muscle Model Isometric and Isotonic Experiments LabView and Optimization Setup Cost Acknowledgements Questions

3 Client and Objective Dr. John Enderle Design and construct a measurement device to record muscle properties in junior level Biomeasurements lab

4 Specifications Final product less than $300 LabView interface Record data from isometric and isotonic muscle contractions

5 Muscle Model Theoretical: 5 parameter model developed by Dr. Enderle (pictured right) Animal Model: leopard frog gastrocnemius Procedure  Collect data from animal model  Optimize theoretical model parameters  Reproduce isotonic experiment with theoretical model

6 Isometric Contraction Constructing the length/tension curve  A plot of maximum tension vs. length  Multiple trials at different fixed lengths  Purpose: estimation of K_se and K_lt, which are related by the slope, K’

7 Implementation Secure muscle at fixed length and stimulate FlexiForce force sensitive resistor records force over time Find max force at each length

8 Isotonic Contraction Constructing the force/velocity curve  A plot of maximum shortening velocity vs. load  Multiple trials at different loads  Purpose: estimation of B1 and B2

9 Implementation Secure muscle to mass and stimulate Phidgets Hall Effect sensor records position over time Differentiate data and find max velocity at each load

10 LabView Receives force and position signals Controls stimulator Displays data for viewing and writes to file

11 Optimization Matlab routine modified from that developed by Dr. Daniel Sierra Uses force/velocity and length/tension data with an initial parameter guess to determine the optimum model parameters

12 Setup Cost Cost for prototype ManufacturerProductModel Price TeckscanFlexiforceA201-25 $16.25 PhidgetsHall Effect1108 $10.75 Home Science ToolsMass set BS- WTHOOK $34.95 Aluminum Frame/Base $0.00 Electrical Components $0.00 total$61.95 Other Considerations  Frog muscle  Additional masses  Electrical and aluminum for other setups

13 Acknowledgments Dr. John Enderle, our sponsor Dr. Daniel Sierra, matlab optimization Dave Kaputa, LabView Serge and Peter, machine shop

14 Questions

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