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 Considerations Student Project Prototype Testing Results and Status Future Plans and Suggestions

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

Customer NeedsSome 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 of 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.

Engineering SpecificationsSome 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

Concept Selection

Concept Selection

Design Considerations Feasibility and user friendliness Detailed motor and torque analysis Budget limitations LVE integration and attachment Control interfacing and communication Power consumption analysis

Mechanical Design Front/Aft Motor Interchangeable Controls integral to LVE Two motors required

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

Torque Analysis

Standard square geometry

Full range of motion

No inflection point No added range in

the reach

Torque Analysis

Offset geometry Full range of motion Visible inflection

point

Torque Analysis

Offset geometry Full range of motion Visible inflection

point

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

PCB Design and Layout

PCB Design and Layout

PCB Design and Layout

PCB Design and Layout

PCB Design and Layout

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.

Structural Analysis

Subject to drop requirements Limited payload weight Finite Element Analysis (FEA)

LVE Mounting

Quick attachment and removal

Easy to use Robust to repeated

use Press fit with cotter

pin

Component Selection

Standardized bolt and nut sizes

Off the self gripper, motors

Less customized parts when possible

Budget restrictions

Student Goal Lift an object from 6-9 inches off the ground

between shelves across the room

Student Components and Analysis Geometric analysis Computer Aided Drafting (CAD) modeling of

designed parts CAD assemblies using parts library available Manufacturing Assembly and test

Student Components and Analysis

Links Brackets Pins

Student Made

Student Made

Student Made

Student Components and Analysis

Prototype

Prototype

Prototype

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 - 3

5 4 4 5 5 3.5

6

TOTALS 80.00% 92.00% 80.00% 80.00% 70.00%

GRAND TOTAL 80.43%

Testing 10/3 time to complete ratio Scrap material

Results and Conclusions Working prototype Lacks robustness in strength and durability Budget restrictions were overlooked Fun project Room for improvement Contains potential multidisciplinary projects

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

Acknowledgements Special Thanks To: Guides:

Phil Bryan Leo Farnand Vince Burolla

Sponsors and Faculty Advisors Dr. Edward Hensel Dr. Beth Debartolo