Submarine Evacuation System for Offshore Structures

1. Submarine Evacuation System for Offshore Structures Client: Dr. Michael Hinchey

2. Agenda • Problem Statement • Project Overview • Deployment Strategies • Prototype Design • Manufacturing • Commissioning • Conclusion • Future Work & Recommendations • Questions

3. Problem Statement • Develop a prototype and deployment strategies to prove an autonomous submersible could be used as an evacuation method for offshore structures.

4. Project Overview • Current Problem • Lifeboats – Exposed to Hazards • Freefall – Uncontrolled • Proposed Solution • Deployable Submarine • Project Goals • Develop and Test Automated Submarine Prototype • Develop and Test Deployment Options • Identify Design Requirements

5. Control Sequence + Φ - Φ + θ - θ Z1 + Z Z2

6. Deployment Strategies 1. Vertical Deployment • Propeller-down launch • Underwater • Avoid GBS interference 2. Horizontal Launch • Release bay filled with water • Exit from enclosed piping 3. Horizontal Docking • Connect with GBS 2. 1. 3.

7. Prototype Design Evolution Phase 1 • Phase 3 • Propeller Shroud with Streamline Hub • Piston Ballast Pumps • Internal Support Mounts • Stepper Motor Sleds Phase 2 Phase 3

8. Prototype Design • Ring guide and shroud • Protect hull • Allow air and water passage around sub during deployment • Shroud • Protects thruster from being damaged • Streamlined hub reduces eddy currents • Lifting Hook allows for the lifting of prototype • Center-axis mounted thruster with F/R control • Piston Pumps

9. Prototype Design: Internal Mounting • 2 Ballast Pump Mounts • 2 Ballast Pumps • 2 Support Rings • 3 Batteries • 1 Circuit Board • 2 Stepper Motors • 4 ¼”-20 Threaded Rod Prototype SolidWorks Model ¼ "-20 Hex Nuts ¼" -20 Threaded Rod

10. Prototype Manufacturing • Ballast Chamber • 25mm diameter piston pump • 40mm vertical piston travel • Driven by stepper motor via rack in pinion

11. Prototype Design: Ballast System Internal Piston Setup Rod Support Mounts Piston Ballast Pump Rack & Pinion (32 - 3/16”) Stepper Motor & Sled

12. Pseudo-wiring Diagram Circuit * GND RS-232 DE-9 Female Pinout MOSFETS Signals 1-6 Pressure Sensor, Accelerometer, etc. ** +5 V PIC * ** GND Signals 1-6 VIN Stepper Motor Stepper Motor Piston Batteries Thruster Clamp

13. Prototype Manufacturing • Hull • Extruded ABS Pipe provided by EMCO • Completed by Tech Services • Ring Guide/Shroud • RP ABS Plastic • Completed by MTC • Piston Pumps • Fabricated from recycled piston shocks • Completed by Tech Services

14. Commissioning • Water Control Tests • Water Tight Hull • Pre-ballast and leveling • Dry Control Tests • Stepper Motor Test • Thruster Test • Sensor Test • Dynamic Balancing

15. Conclusion • Developed an automated submersible prototype with active Pitch, Depth, and Thrust control • Developed commissioning procedures to verify operability of prototype • Developed test procedures to simulate emergency evacuation of offshore structures • Developed the codes required to perform testing with the prototype

16. Recommendations and Future Work • Complete commissioning of active systems • Depth • Pitch • Thrust • Complete deployment tests • Analyze motion • Make recommendations for viability of full-scale implementation

17. Questions? Thank-you www.lifesubengineering.weebly.com