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SkiFAST. Conceptual Design Review. Agenda. Introduction Specifications Conceptual Design of a Ski Bed and Force Input Functional Modeling Design Solutions Morphological Charts Full Machine Designs Evaluation Discussion. Specifications. Initial problem description:
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SkiFAST Conceptual Design Review
Agenda • Introduction • Specifications • Conceptual Design of a Ski Bed and Force Input • Functional Modeling • Design Solutions • Morphological Charts • Full Machine Designs • Evaluation • Discussion
Specifications • Initial problem description: • “Ski injury research has not determined a correlation between ski edge pressures and human joint forces. SkiFAST will create a manufacturable, research-grade force analysis device to examine this relationship under varying conditions.”
Project learning • Research • Experiments • Intuition • Results in a project specifications document • A “living document”
Functional Modeling • A modern technique for increasing innovation • Break down larger functions into sub-functions that are easier to handle • Ski bed • Force input • “Leg” • Simplifies the design of complex solutions
Ski Forces Function Diagram
Design Solutions • List physical solutions to each function • Electrical pressure sensors • Hydraulic line pressure • Air pressure • Spring constant/displacement Receive Forces
Ski Bed Morphological Chart
Ski Bed Solution 1 – Pneumatic Rods or Tracks Tilting table for angle variation Travelers (rods or tracks) w/pneumatic or mechanical springs
Ski Bed Solution 2 – Vertical Springs Ski is set in place but not restricted Individual rod banks for each edge
Boot Forces Function Diagram
Input Force Morphological Chart ???
Input Force Solution 1 – 3 Axis “Cherry Picker” X Z 3-Axis movement similar to a CNC mill Y Pin connections allow removal
Input Force Solution 2 – Component Actuators Force input via 3 separate linear actuators In-boot sensors will detect resolved point loads Computer control will compensate for static application points
An integration of ski bed and force input solutions Full Machine Design
Machine Design Solution 1 – Dual Piston, Component Actuators
Machine Design Solution 1 – Dual Piston, Component Actuators • Pros • Cons Simple Measures forces at both ski edges Difficult to remove for human use Smaller angular degree of freedom Least “realistic”
Machine Design Solution 2 – Track Table, Component Actuators
Machine Design Solution 2 – Track Table, Component Actuators • Pros • Cons High angular degree of freedom Allows full flex of the ski Difficult to remove for human use Measures one ski edge
Machine Design Solution 3 – Pneumatic Rods, “Cherry Picker”
Machine Design Solution 3 – Pneumatic Rods, “Cherry Picker” • Pros • Cons High angular degree of freedom Allows free flex of the ski Most “realistic” force input Easy to use Most expensive Measures one ski edge
Summary Pros Cons 1 • Simple • Measures force at both ski edges • Difficult to remove for human use • Limited DOF • Least “realistic” 2 • Least expensive • High DOF • Allows full ski flex • Difficult to remove for human use • Measures force at one ski edge 3 • High DOF • Allows full ski flex • Most “realistic” force input • Easy to use • Most expensive • Measures force at one ski edge
Scoping • 2 degrees of freedom • Build in modularity • Build individual components • Use temporary fixtures • Farm out to future teams
Thank You Dr. Seegmiller, for your support!
Questions? Discussion
