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P11213: Modular Student Attachment to the Land Vehicle for Education - - PowerPoint PPT Presentation
P11213: Modular Student Attachment to the Land Vehicle for Education - - PowerPoint PPT Presentation
P11213: Modular Student Attachment to the Land Vehicle for Education Jared Wolff, Andrew Komendat, Oyetunde Jolaoye, Dylan Rider Contents Project Goals Customer Needs Engineering Specifications Concept Selection Design
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Project Goals
Attachment to Land Vehicle for Education (LVE) Introduce freshman engineers to design tools and
processes
Removable and interchangeable Modular Student
Attachment (MSA)
Utilize RIT facilities Hands on example Team project
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Customer Needs
Some significant customer needs:
- The MSA must teach first year RIT Mechanical Engineering
students design principles.
- MSA must also utilize in house facilities for the manufacturing
- f MSA components.
- MSA must be of a low cost so that more would be purchased,
- MSA must be easy to store in the allocated storage and it
must also be safe to use.
- MSA must be impressive such that other schools and faculty
would want to emulate it.
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Engineering Specifications
Some engineering specifications:
MSA shall require each student to design, model, and
manufacture 1 to 3 parts
MSA shall required assembly in CAD of 5 to 15 parts MSA shall include at least 5 components MSA shall have less than 10 customable parts MSA shall require between 0.5 and 2 hours to teach per
class
MSA shall have not exceed 5 pounds, including payload MSA shall require less than 5 repairs during its lifetime
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Concept Selection
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Concept Selection
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Design Considerations
Feasibility and user friendliness Detailed motor and torque analysis Budget limitations LVE integration and attachment Control interfacing and communication Power consumption analysis
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Mechanical Design
Front/Aft Motor Interchangeable Controls integral to LVE Two motors required
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Torque Analysis
Calculator in Matlab Finds geometric angles based on 90 degree rotation Uses 9x9 matrix to solve for torque required Checking tool for professors to validate student
design
Help visualize real world limitations
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Torque Analysis
Standard square
geometry
Full range of motion No inflection point No added range in the
reach
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Torque Analysis
Offset geometry Full range of motion Visible inflection point
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Torque Analysis
Offset geometry Full range of motion Visible inflection point
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Power Consumption
72.2 oz in at 4.8V 90.3 oz in at 6V Worse Case Transients ~0.700 mA Normal Under Load Current ~0.500 mA 5V provided by the Buck Circuitry
Power = 2*0.500 * 5V = 5W Current = 1 A
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PCB Design and Layout
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PCB Design and Layout
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PCB Design and Layout
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PCB Design and Layout
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PCB Design and Layout
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Control Communication
USART Interface
115200 BAUD 1 stop bit Normal Inverted Operation No parity
Data protocol
All data is sent via UART from the LVE controller.
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Structural Analysis
Subject to drop requirements Limited payload weight Finite Element Analysis (FEA)
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LVE Mounting
Quick attachment and
removal
Easy to use Robust to repeated
use
Press fit with cotter pin
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Component Selection
Standardized bolt and nut
sizes
Off the self gripper, motors Less customized parts
when possible
Budget restrictions
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Student Goal
Lift an object from 6-9 inches off the ground between
shelves across the room
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Student Components and Analysis
Geometric analysis Computer Aided Drafting (CAD) modeling of
designed parts
CAD assemblies using parts library available Manufacturing Assembly and test
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Student Components and Analysis
Links Brackets Pins
Student Made Student Made Student Made
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Student Components and Analysis
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Prototype
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Prototype
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Prototype
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Testing
Test plan includes 18 tests Passed all tests
Survey Feedback from ME Professors P11211-P11213 Land Vehicle for Education (LVE) Megan Ott and Andrew Komendat Response # Question #1 Question #2 Question #3 Question #4 Question #5 1 5 4
- 4
2 2 4 5 4 4 5 3 4 5 3 3 4 4 3 5 4
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5 4 4 5 5 3.5 6 TOTALS 80.00% 92.00% 80.00% 80.00% 70.00% GRAND TOTAL 80.43%
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Testing
10/3 time to complete ratio Scrap material
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Results and Conclusions
Working prototype Lacks robustness in strength and durability Budget restrictions were overlooked Fun project Room for improvement Contains potential multidisciplinary projects
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Future Suggestions and Improvements
Better material selection color for aesthetics Manufacture gripper in house (cost reduction) More robust and capable drive servo Decrease size and capability of MSA Improve multidisciplinary projects
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