Team Clean Sweep

Clean SweepersName Year Major

Joshua Vogt Junior Industrial Distribution

Katie Schneider Sophomore Aerospace Engineering

Kanika Gakhar Sophomore Aerospace Engineering

Andres Diaz Senior Electrical Engineering

Benjamin Swain Freshman Mechanical Engineering

Yuki Oji Junior Electrical Engineering

“There is no problem so bad that you can’t make it worse.”

– Chris Hadfield

Need statement

Device to circulate throughout the ISS and collect stray pieces of Foreign Object Debris

Needs and ConstraintsNeeds Constraints

Small, unobtrusive, and inconspicuous Should not create additional debris

Ability to circulate freely in microgravity Should not weigh more than 100 g

Ability to withstand wall impacts at 5 ft/sec and un-calibrated astronaut swats

Should not have rough edges or sharp corners

Material that will gather the FOD and is renewable Should not conduct electricity

Easy attachment and removal of the attractive material

Should be 3D printed in a single run within a 10x10x14 space

Easy to maintain

Engineering SpecificationsRequirements Metrics Numerical

TargetsLightweight and unobtrusive Minimum Weight of entire device <100 g

Comply with 3D Printing restrictions Minimum size (length x width x height) of all components

< 10 x 10 x 14 cm

Ability to withstand wall impacts and astronaut swats

Minimum yield strength of material >42 Pa

Easy to renew attractive material Number of steps to remove and insert duct tape

< 3

FUNCTIONAL BLOCK DIAGRAM

• Human input – setup

• Clean Duct-tape• Suspended FODs

Inputs

• Drift passively• Allow polluted air to

enter• Capture suspended

FODs• Prevent captured

FODs from escaping

Functions• Clean, FOD-free air• Recreational

Benefits• Saturated Duct-tape

covered in captured FODs

Outputs

Alternative Prototype 1

Shielding Structure and tendency to passively roll/bounce

Compliance with 3D Printing Restrictions

Alternative Prototype 2

Inverted sticky surface to maximize area and efficiently capture particles

Need for active propulsion and electric components

Final Conceptual Design

Shielding Structure and tendency to passively roll/bounce

Inverted sticky surface to maximize area and efficiently capture particles

Mathematical analysis:Proof of strength to withstand collisions

𝐼𝑛𝑖𝑡𝑖𝑎𝑙𝑉𝑒𝑙𝑜𝑐𝑖𝑡𝑦 :𝑉 1¿5𝑓𝑡𝑠𝑒𝑐 ≈1.5

𝑚𝑠

𝑇 𝑖𝑚𝑒𝑆𝑝𝑎𝑛𝑜𝑓 𝐶𝑜𝑙𝑙𝑖𝑠𝑖𝑜𝑛 :∆ 𝑡=0.01 𝑠

𝐹𝑖𝑛𝑎𝑙𝑉𝑒𝑙𝑜𝑐𝑖𝑡𝑦 :𝑉 2¿ 0𝑚𝑠

𝐴𝑣𝑒𝑟𝑎𝑔𝑒 𝐴𝑐𝑐𝑒𝑙𝑒𝑟𝑎𝑡𝑖𝑜𝑛 :𝑎=∆𝑉∆ 𝑡 =−150𝑚

𝑠2

𝑁𝑒𝑡 𝐹𝑜𝑟𝑐𝑒 :∑ 𝐹=𝑚 .𝑎=15𝑁

𝑃𝑟𝑒𝑠𝑠𝑢𝑟𝑒𝑎𝑐𝑡𝑖𝑛𝑔𝑜𝑛 𝑓𝑎𝑐𝑒 :𝑃=𝐹𝐴=1.07 𝑘𝑃𝑎

𝒀𝒊𝒆𝒍𝒅𝑺𝒕𝒓𝒆𝒏𝒈𝒕𝒉𝑬𝒙𝒆𝒓𝒕𝒆𝒅 𝑷𝒓𝒆𝒔𝒔𝒖𝒓𝒆 ≈𝟏𝟎

𝟓

𝐴𝑣𝑔 .𝑌𝑖𝑒𝑙𝑑 h𝑆𝑡𝑟𝑒𝑛𝑔𝑡 :𝟒𝟒𝑴𝑷𝒂

𝑃𝑟𝑒𝑠𝑠𝑢𝑟𝑒𝑎𝑐𝑡𝑖𝑛𝑔𝑜𝑛 𝑓𝑎𝑐𝑒:𝟎 .𝟎𝟎𝟏𝑴𝑷𝒂

Mathematical analysis:Proof of maximized surface area

𝑺𝒖𝒓𝒇𝒂𝒄𝒆 𝑨𝒓𝒆𝒂𝒐𝒇 𝑻𝒓𝒊𝒂𝒏𝒈𝒍𝒆𝒔𝑺𝒖𝒓𝒇𝒂𝒄𝒆 𝑨𝒓𝒆𝒂𝒐𝒇 𝑪𝒚𝒍𝒊𝒏𝒅𝒆𝒓 ≈𝟏 .𝟖𝑺 . 𝑨 .𝒐𝒇 𝑺𝒑𝒉𝒆𝒓𝒆>𝑺 . 𝑨 .𝒐𝒇 𝑻𝒓𝒊𝒂𝒏𝒈𝒍𝒆𝒔>𝑺 . 𝑨 .𝒐𝒇 𝑪𝒚𝒍𝒊𝒏𝒅𝒆𝒓

Exploded View

Assembly

Fulfillment of 3D Printer Requirements

Alternative Protection Designs

Results

Size • 7cm x 7 cm x 7 cm

Mass • 35 g

Dual tape-application mechanism

Structurally sound

Small and unobtrusive

Maximized surface area

3D-Print within restrictions

Alternative Implementations

• Increase size and adhesiveness• Carry small tools and objects

Portable Storage Device

• Use lights and colors for decoration• Use as a ball or die to play games

Interactive Recreational Die

• Insert air freshener cartridges for on-the-go freshnessMobile Air-Freshener

Future ImprovementsAdd Photo-luminescent materials for night illumination

Add LED lights for signal messages

Add Sensors to indicate toxic air quality levels

Self-propulsion for quicker and automated cleaning

Incorporate an Internal Adhesive Replenishment System (IARS)

Acknowledgements Mr. David Kanipe

Dr. Greg Chamitoff

Dr. Joe Kerwin

Mr. Rodney Boehm

Aggies Invent Organizers

EIC Volunteers and Technicians