156A Finals Week

Overview of Status of Analysis, Design, Fabrication, Tests, etc.

• • A size on the float has been determined. The preliminary design and measurements of the float have been completed. We will wait until next quarter to begin fabrication and testing.

Accomplishments from Previous Week

• • Began working on presentation

    • Presentation is available on the website

  • Called Star Oddi

    • Starr Oddi called Aaron on 12/5/16 to discuss their sensors. It was determined that the portion of the sensor that reads pressure is actually the rear end of the sensor that has a membrane. This information is useful so we know how to mount the sensors. In their discussion they also determined that using the precision of the sensor would result in a better reading. Based on Aaron’s calculations after the meeting it was determined that using the bit rate to calculate the velocity would result in an error of ~0.5in.

  • SolidWorks

    • A model of the initial float for the first test has been modeled in solidworks. The reducers and caps were modelled by Mc Master Carr and downloaded to SolidWorks.

• • Material List:

  • 8” PVC cap

  • 8” PVC tube

  • 8” to 6” reducer

  • 6” to 4” reducer

  • 6” PVC tube

  • 4” PVC tube

  • 4” PVC cap

  • ⅜” Slotted t-track

  • Adjustable Bail

  • Fins

  • Individual Component Analysis

  • Alan: Researched articles on underwater cable behavior

  • Kendra: Looked into various designs for securing the sensors in the float

  • Aaron: Spoke with Star Oddi about the sensor and performed calculations

  • Tung: Researched articles on fin hydrodynamics

  • Harry: Performed a FBD analysis on the float to determine coefficients.

Goals for Week 1 of Next Quarter

• • Individual component analysis complete for each individual

    • Star Oddi Centi sensor performance (Aaron)

    • Underwater cable behavior (Alan)

    • Sensor Housing and underwater locking mechanisms (Kendra)

    • Effect of line tilt on the velocity readings (Harry)

    • Hydrodynamic fin behavior (Tung)

  • Gather all necessary materials for float construction

Sponsor Comments from Meeting

• • None (Finals Week)

Instructor Comments from Meeting

• • None (Finals Week)

Risks and Areas of Concern

• • We need to find a testing facility that will allow us to properly test the float when it is ready for a full run.

  • We need more information from Spawar about the entire system

Resources or Information Required but not Available

• • Some information is not available from Spawar since the project has not been fully built.

  • Some information cannot be shared due to NDA

Schedule

• • Complete final presentation

Budget

• • Amount spent: $0 

    • A materials list will be compiled once a meeting with Mark Gillcrist has been completed and he approves the first design

Progress on Report and Webpage

• • Webpage will be updated shortly