Trishuli River 3

Final Report RopeX Lab 4: Group 4

Constantinos Kandias Anthony Reyes Kishon Webb Mahgoub Mohamed

Planning and Clarifications Background Where

Who

[1]

In Nepal

What

[2]

Local residents Of Nepal

Why

[3]

Challenges Crossing the river

Goal : Provide the local residents a method of transportation

[4]

The Trishuli River

Planning and Clarifications Design Specifications

Requirement

Constraint

Priority

Yes(Y)

(1-5)

Total

Rank

No(N)

Objectives ●

Safety

●

Efficiency ○

Speed

○

Strength

Safety

Y

4

8

2

Easy of use

N

4

4

3

Inexpensive

N

2

2

5

●

Ease of implementation

Easy Implementation

N

3

3

4

●

Low cost

Versatility

Y

5

10

1

●

Autonomous Speed

N

1

1

6

●

Compact Autonomous (after activation)

Y

4

8

2

Compact

N

3

3

4

Planning and Clarifications Functional Structure Diagram

Conceptual Design Morphological Analysis Option 1

Option 2

Option 3

Option 4

Housing

N/A

Box

Circle

Triangle

Load Carrier

Weight carried on top of design

Basket hooked to design carrying weight

Weight Hooked N/A directly to design (without Basket)

Type of Motor

Regular motor

150 rpm

300 rpm

Gear motor 90 deg shaft

Type of Wheel

Smooth

Groved

Spoked

N/A

Powertrain

Direct

GearBox

Pulley system

N/A

Wheel configuration

Two wheels Three Wheels (on top of rope) (on top of rope)

Design 1

Design 2

Design 3

Design 4

Three wheels Four wheels (Two on top one ( Two on top Two beneath beneath rope) rope )

Conceptual Design Conceptual Design Selection Design Criteria

Design 1 Design 2

Design 3 Design 4

Weighting Design 1 Design 2 Design 3 Design 4

Safety

0.05

2

3

1

4

Efficiency

0.28

3

2

2

4

Easy Implementat ion

0.23

4

3

2

3

Inexpensive

0.10

4

2

3

1

Autonomous

0.14

3

3

3

3

Compact

0.2

4

2

3

1

3.48

2.42

2.39

2.73

Total

Embodiment Design Preliminary Layout

Principle Solution

Design 1

Component

Approximate Dimensions (mm)

Motor :

Length - 30 Width - 12 Height - 10

Battery Pack

Length - 55 Width - 10 Height - 55

Inner wheel

Diameter - 17 Width - 10

Outer Wheels

Diameter - 60 Width - 30

Steel Rod

Diameter - 4 Length - 150

Super Glue

Negligible

DPDT Slide switch

Negligible

Embodiment Design Design Analysis

Design Implementation Manufacturing Raw Materials

Tools

Laser Cutter HDF board

[8]

[10]

3D Printer Polylactic acid (PLA) [9]

[12]

Gorilla Glue

Carbon steel Rod [11]

[13]

Design Implementation Prototype Analysis Prototype testing

Prototyping design

Test 1

Full View of Prototype design

Test 2

Test 3

Gear ratio:

5:1

1:1

1:2

Distance:

15ft

10ft

15ft

Time:

1:08

1:40

2:57

Problems:

Body deforming

Gears disengaged

Weight shifted

Improvements 1: Gear Meshing

Side View of Prototype design

3: Stiffness

2: Balance

[5]

[6]

[7]

Design Implementation Final design

Part Powertrain

●

Both wheels receive power from motor

Gears

●

Added gears to achieve ideal power output

●

Multiple gear ratios adjustable via shift handle

●

Included spacers to keep gears aligned

●

Increased size of side panels

●

Improved axle supports

●

compartment for the battery pack to be place

●

Teeth added to improve grip

●

Spacing increased to accommodate gearbox

●

reprtoing of the wheels

●

Adding additional support beams in the structure

Housing

Wheels

CAD model of final design

Changes made to final Design

Design Implementation Final design

Parts

Cost

HDF board ● Volume = 584564.69 cubic millimeters

0.20 * 2.097 = $0.42

○

Area = Volume/Height = 584564.69 / 3 =194855mm2 =2.097 ft2

●

DPDT Slide Switch

$0.78

●

Tight-Tolerance 12L14 Carbon Steel Rod Ultra-Machinable, 4 mm

2 * $3.25 * 0.246 =

Diameter, 1 Foot Long

$1.60

○

Two of them cut to 0.246ft

●

N20 Micrometal Gear Motor (150 RPM)

$6.00

●

4xAA Battery holder (wire leads)

$2.54

●

Super Glue The Original Super Glue 15187, .07 Ounce, 12-pack

$0.97

Total :

$12.31

References [1]Wikimedia Commons, commons.wikimedia.org/wiki/File:Flag_Of_Nepal.jpg. [2] Population Estimates and Projections, www.swindonjsna.co.uk/dna/population-estimates-projections. [3]“The High-Wire Act Some Nepalese Children Take to School.” Now I Know nowiknow.com/the-high-wire-act-some-nepalese-children-take-to-school/. [4]“Rafting Trilushi River.” Treks, Expeditions and Holidays in Nepal I Adventure Alternative Nepal, www.adventurealternativenepal.com/rafting-trilushi-river/. [5]“How to Evaluate Gear Mesh Stiffness in a Multibody Dynamics Model.” COMSOL Multiphysics©, www.comsol.com/blogs/how-to-evaluate-gear-mesh-stiffness-in-a-multibody-dynamics-model/. [6]“Tilted Balance Scale Clipart Clipart.” WorldArtsMe Cliparts Collections., worldartsme.com/tilted-balance-scale-clipart.html#. [7]Hruska, Joel. “Apple's IPhone 6, 6 Plus Are Failing Early Thanks to 'Touch Disease,' Bending Problems.” ExtremeTech, 26 Aug. 2016, www.extremetech.com/mobile/234552-apples-iphone-6-6-plus-are-failing-early-thanks-to-touch-disease-bending-problems. [8]Laser, Author CO2. “About Laser Cutting And The Benefits Of This Technology.” Custom Machinery, 7 Dec. 2016, www.custom-machinery.ca/about-laser-cutting-and-the-benefits-of-this-technology/. [9]“FlashForge Finder 3D Printer.” FLASHFORGE | Clas Ohlson, www.clasohlson.com/uk/FlashForge-Finder-3D-Printer/38-7720. [10]“MDF & HDF Plywood Board Retail Supplier in Kerala | Varna Group.” Varnagroup, www.varnagroup.com/products-services/varna-plywood/mdf-hdf-boards/. [11]“Round Bar - Harding Steel Brisbane.” Harding Steel, www.hardingsteel.com.au/round-bar/. [12]“Polylactic Acid (PLA) Plastic.” Whiteclouds 3D Printing, ss.whiteclouds.com/3dpedia-index/polylactic-acid-pla-plastic. [13]“Incredibly Strong Glues, Tapes, & Sealants | The Gorilla Glue Company.” Gorilla Glue, www.gorillatough.com/.