Bobcat Drillers Patrick Kirts Jake Waldrep Dr Humboldt

Bobcat Drillers Patrick Kirts, Jake Waldrep, Dr. Humboldt Mandell, Tyler Sterling, and Davontae Habbit

BOBCAT DRILLERS Davontae Habbit, Patrick Kirts, Tyler Sterling, and Jake Waldrep

BACKGROUND: • Product: Mars Drill, designing of anchor mechanism to apply downforce • Sponsor: Texas Space Grant Consortium (TSGC), NASA Funding • Contact: Dr. Humbolt Mandell, UTAustin • Location • 3925 West Braker Lane, Suite 200, Austin Tx, 78759 • Details: Development of an easily deployable mechanism to apply downforce on 2014’s drill design. • Specifications • Capability of applying sufficient force to drill up 20 meters deep • Compatibility with existing technology supplied by NASA • Design allows for core sample extraction • Minimal cost

MISSION STATEMENT Designing and manufacturing of an easily deployable mechanism that is capable of applying extensive downwards force on the previously designed drill bit, removing the need for relocating the drill on the spacecraft or increasing the overall weight.

Need Statements Related to Importance

Target Specifications and Metrics Specifications 1. Sufficient Force 2. Uses available power source 3. Withstands drilling force 4. Compatibility 5. Counter drilling force 6. Easily retrieved 7. Simple to use Metric 1. 2. 3. 4. 5. 6. 7. Force Target, Force applied on bit : lbs Electricity, Volts/Watts Strength, psi General Design and dimensions, in Torque, Force, N*m lbs N/A

Linking Metrics to Needs

Gantt Chart Important Dates ● 9/11 - Discussion with Mandell ● 9/28 - TSGC level I report ● 10/6 - Concept Selected ● 10/16 - Make Buy Decisions ● 10/16 - CAD models ● 10/15 - Process management ● 10/30 - Begin Fabrication ● 11/16 - Final Report and Presentation to TSGC

Concept Generation

Concept Variants

Pugh Chart

Concept Selection Matrix

Scissor Jack Windows

Scissor Jack • Critical Customer Needs Met: • Applies down force • Anchors mechanism • Resists torque of drill • Functional in elements • Uses available power source • Simple to Use

FMEA (Failure Mode & Effects Analysis)

Bill of Materials (BOM)

Scissor Jack (Components)

Route Sheet

OPC (Operation Process Chart)

PERT Chart ● Design finalization, processing, OPC, and materials ordering should be ran in parallel to ensure parts arrive in time ● Due to research, concept generation and selection took the longest amount to time. ● Assembly has the shortest duration Process Name X # Duration (days)

Manufacturing Process

Prototype Testing (FEA) ● Applied 90 lb force on lead screw ● Used Von Mises Stress to verify part strength ● Stress seen by lead screw, about 97 psi ● Stress seen by links, about 100 psi

SWOT Analysis

Future Considerations and Designs • The addition of gear teeth to ensure linkage pairs remain aligned and stabilized throughout linear travel. • Identification of elastic material to protect from elements entering the gripper window and electrical input port.

Acknowledgements • • • Mentor: Humboldt C. Mandell, Jr. , Ph. D. - The University of Texas Center for Space Research (CSR) Instructor/Supervisor: Namwon Kim, Ph. D. , Ingram School of Engineering, Texas State University Lab Supervisors & Technicians: Ray Cook, Ph. D. , Ingram School of Engineering, Texas State University

Questions?