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SEED David Millson Transportation Spring Presentation #2

SEED David Millson Transportation Spring Presentation #2. Daniel Sturnick Chris Abbot-Koch Lance Nichols.

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SEED David Millson Transportation Spring Presentation #2

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  1. SEEDDavid Millson TransportationSpring Presentation #2 Daniel Sturnick Chris Abbot-Koch Lance Nichols

  2. Our client Mr. Milson needs a safe and reliable means of transportation from his house to his pond. Due to a medical condition he is no longer able to access his pond under his own power. The pond is located roughly 300 feet in the linear direction and has a 200 foot vertical drop in elevation. There are obstacles such as wetland and rough terrain standing in the way as well. 200 ft 300 +/- 50 ft

  3. New Project Scope – Scaled Down Model • After much deliberation and many meetings we’ve decided to change the scope of the project to designing the entire lift and building a full scale model rather than designing and building only a portion of the finished product.

  4. Construction Procedures • Lay out design over field: final measurements • Excavate for concrete: Locations for top/bottom/intermediate footers. • Form concrete  how to get concrete poured (portable mixer vs. chute) • Intermediate pole installation • Install/fix cables • Install drive/control system • Install cart on cables

  5. Electrical SystemsACH550 Practically Solves all of our electrical needs: Ramp Up/Ramp Down Speed Governor Forward/Stop/Reverse Can be connected right to a household circuit breaker.

  6. Electrical Systems • As the cart approaches the upper and lower landing docks, there will be a pair of limit or rocker switches. • As the cart rolls over the first switch, it will send a signal to the variable frequency drive (ACH550) to ramp down the motor. • As the cart rolls over the second switch, it will send a signal to the VFD to stop the motor.

  7. Human Perception of Vibrations There is a range of vibrations that are disturbing to the human body. • Research and communication with Professor Hernandez revealed that the cable system needs to be below or above 2.5 – 10 Hz • Calculations revealed that we would need to be outside the lower bound of this range < 2.5.

  8. Tension Calculations • Sum of forces in the y-direction… • Tsin(theta1) – Tsin(theta2) – P = 0 • T = P/(Sin(theta1) – Sin(theta(2)) T T P

  9. Intermediate Supports • Calculations revealed that intermediate supports. • 2 Intermediate Columns will minimize each cable tension to ~12,000 lbs., yield a maximum deflection of ~3.25 ft. and a natural vibration of .5 Hz.

  10. Questions?

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