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Steering/Braking Mechanism & Guideway

Presented by:

Chin Ming Lui

Jeffrey Chau

Alejandro Valenzuela

Thang Ngo

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Introduction

Why do we need a brake?

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State-of-the-Art literature review

Disc Brake

  • Good in heat transfer
  • Easy maintenance
  • Effective hard braking
  • Water repellent

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Current Steering Mechanism

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Function Specifications for ¼ Scale Model

  • The steering mechanism is activated in around 1 sec.
  • The brake system can gradually slow down the cabin with a short distance of without overheating components assuming travelling speed is 5 mph
  • Minimize vibration levels when switching tracks
  • Generate low noise levels (<50 dBA)

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Image Source: Metrino PRT

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Challenges of the Project

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Products on Market that can be used for our scale model:

Team Losi 5T Disc Brake

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Futaba 3306 High Torque Servo:

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Brake system on full scale bogie

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Pneumatic Actuators

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Goal of the Project and deliverables

  • Build ¼ scale model bogie for the Personal Rapid Transit
  • Improve and modify the existing design of the steering mechanism
  • Replace current actuators with pneumatic actuators
  • Install brake system and ultimately connect it with energy regenerating unit
  • Develop a mechanical locking system to keep steering mechanism engaged to the guideway
  • Suggesting automatic braking in case of extreme scenarios

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Each team member’s responsibility

Thang Ngo: Help refining the steering mechanism, researching on braking technology, assembling and building steering wheels and braking system.

Jeffrey Chau: Designing the brake system on scale model, modify the existing design of the steering mechanism, look for components for scale model

Chin Ming Lui: Conduct research on different kinds of actuators, perform necessary force analysis and calculations, tweak the design of the current steering mechanism

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Gannt Chart

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Guideway Overview

1. Intro

2. State-of-the-art literature review

3. Functional specifications

4. Challenges

5. Goals/Deliverables

6. Responsibilities

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Why do we need a guideway?

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http://g.fastcompany.net/multisite_files/cocreate/imagecache/1280/article_feature/1280-buenos-aires-roller-coaster-2.jpg

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What are the requirements for the guideway?

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What is the significance of fulfilling the requirements for the guideway?

  • Demonstrate to officials and people of interest that a working pod car can navigate a city with elevation changes.
  • Allows for stations to be at higher or lower elevations.
  • Can build around cities and existing structures.

http://inist.org/library/2014-09.Furman.Automated%20Transit%20Networks.MTI%201227.pdf

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Similar Existing Methods

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Similar Existing Methods that are Operational

https://en.wikipedia.org/wiki/Morgantown_Personal_Rapid_Transit#Modes_of_operation

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Previous Years design

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Hanging supported vehicle tracks are common on roller coaster rides.

http://www.mouseinfo.com/gallery/files/4/1/2/7/dl140157.jpg

http://www.georgianewsday.com/thumbnail.php?file=assets-2014/580146_7c0e2c22_0645_11e4_ba4e_3b3727fd03ff_168281416.jpg&size=article_large

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Functional Specifications

  • Keeping previous year’s current track design
  • Track will have an incline and decline of 17 degrees
  • Fulfill other teams requirements
  • Possible complete track for demonstration

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Challenges - Suspension

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Challenges- Wayside Pickup

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Goals

  • To have a guideway to support the travel of the intermediate pod car
  • To have a complete intermediate scaled guideway that demonstrates inclinations
  • To fulfill other team's needs
  • To have a complete track that is easy to assemble/disassemble and move

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Gantt Chart

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References

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O’Donnell, J. (2011, July 18). Automatic braking in cars helps cut down on crashes - USATODAY.com. Retrieved September 29, 2015, from http://usatoday30.usatoday.com/tech/news/2011-07-18-self-braking-cars_n.htm

Kahane, C. (1983, February 1). A Preliminary Evaluation of Two Braking Improvements for Passenger Cars. Retrieved September 29, 2015, from http://www.nhtsa.gov/cars/rules/regrev/evaluate/806359.html

Brauer, K. (2009, May 12). Brakes: Drum vs. Disc. Retrieved September 29, 2015, from http://www.edmunds.com/car-technology/brakes-drum-vs-disc.html

Auto Braking Systems. (2014). Retrieved September 30, 2015

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Photos:

Sulaiman, S. (n.d.). Streetsblog Los Angeles. Retrieved September 30, 2015, from http://la.streetsblog.org/category/east-la/

Servo: http://www.largescalerc.com/FUTM0021-FutabaS3306MGLargeScaleHighTorqueServo.aspx

GPC Series Pneumatic Actuator: http://www14.informatik.tu-muenchen.de/konferenzen/Jass06/courses/5/Papers/Ponomareva.pdf

Car Braking System Diagram Wallpapers | Img Need. (2015, June 30). Retrieved September 30, 2015, from http://www.imgneed.com/car-braking-system-diagram-wallpapers.html

Drum brake: Brake Safety Information from Redding Wheel and Brake, Brakes, Front End Service, Steering, Suspension and Wheel Alignment. (n.d.). Retrieved September 30, 2015, from http://www.reddingwheelandbrake.com/brakesafety.htm

Train brakes I Vehicles. (n.d.). Retrieved September 30, 2015, from http://eurailmag.com/of-trains-and-brakes/

Advantages and Disadvantages of Disc Brakes. (n.d.). Retrieved September 30, 2015, from http://lincolntrial.integr8cms.net/index.php/27-disc-brakes/section-6/discbs/7-discbs-advantages-and-disadvantages-of-disc-brakes

Lyden, S. (2012, March 1). Air Brakes or Hydraulic Brakes: That is the Question. Retrieved September 28, 2015, from http://www.worktruckonline.com/article/story/2012/03/air-brakes-or-hydraulic-brakes-that-is-the-question/page/1.aspx

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¼ scale disc brake: Team Losi 5T brake: rctruckstop.com/2013/05/17/losi-5ive-t-roller/