Student-built vehicle finds its own way

10 06 2011

Source: The Daily Bulletin, University of Waterloo

A team of undergraduate and graduate students from the University of Waterloo Robotics Team and the Waterloo Autonomous Vehicles Lab are back from the recent Intelligent Ground Vehicle Competition with the best showing of any Canadian entry.

Seen in the photo, left to right, are faculty advisor Steven Waslander (mechanical and mechatronics engineering), PJ Mukhurjee, Sid Ahuja, Arun Das, Michael Tribou. Key team members not pictured include Peiyi Chen and Ryan Turner.

The 19th annual Intelligent Ground Vehicle Competition was held at Oakland University in Rochester, Michigan. It’s described as one of the largest and most prestigious competitions for custom autonomous vehicles in North America. The competition is run annually by the Associate for Unmanned Vehicle’s International, with sponsors including the US Department of Defense, Lockheed Martin, and General Dynamics.

The Waterloo entry — named Indrik — placed second out of 56 teams from the United States, Canada, India, Japan and the United Arab Emirates in the vehicle design competition, winding up just 4 points (out of a possible 300) behind the grand prize winner. Waterloo also finished 4th in the JAUS challenge, which requires successful implementation of an industrial calibre communications framework for autonomous vehicles.

According to Craig MacKenzie, a member of the team’s executive, the competitors are also looking forward to a top-ten finish in the autonomous navigation challenge, which requires vehicles to autonomously navigate between four GPS waypoints while dynamically avoiding obstacles including construction barrels and staggered fencing without human intervention. Full results will be released at the end of the month.

The competition also features a “fully autonomous” challenge (without GPS) requiring navigation of a simulated roadway strewn with barricades. A last-minute failure of the vision computer left Indrik unable to participate properly in that event.

However, the team’s solid mechanical design and software strategies were widely recognized by competitors. “Our custom suspension design and unique approach to mapping and path planning generated a lot of interest with the other teams and industry representatives,” says a report from Rochester. “We are eagerly looking forward to continued development and even more success in the future!”





Machining Hub Adapters with Keyways for Wheelchair Motors

12 08 2009

This post describes how to custom build the hub adapters with keyways for wheelchair motors.

We will be making 4 of these adapters which will fit on top of the 6″ Rims through nuts and bolts.

Equipment:

Baxter Verticut 14″ Horizontal Bandsaw Technical Support Center, University of Windsor, Ontario
Harrison M300 Horizontal Lathe (13″ x 40″) Technical Support Center, University of Windsor, Ontario
Charmilles’ Robofil 240SL Electrical Discharge Machine (EDM) MAME Laboratory, University of Windsor, Ontario
Dewalt Drill Technical Support Center, University of Windsor, Ontario

Materials Required:

Mild steel, 4.5″x16″ (Cost: CAD $84.75) Essex Metals, Oldcastle, Ontario
S-500 Coolant Technical Support Center, University of Windsor, Ontario
Magic Cutting Fluid (oil) Technical Support Center, University of Windsor, Ontario

Steps

  1. Cut the steel tube into 4 equal parts using the Bandsaw and mount the first piece on the Lathe for machining.

    Mounted Steel for Machining (Front View)

    Mounted Steel for Machining (Front View)

    Mounted Steel for Machining (Side View)

    Mounted Steel for Machining (Side View)

  2. Set the readout to zero and keep cutting into the stock by turning until you get a length of three inches.
  3. Chamfer the edges of the bottom side with a 45 degree angle, so that it can fit the center of the rim tightly.
  4. Drill a small hole in the center of the bottom plate.
  5. Drill a bigger hole now, while using the S-500 coolant.
  6. Apply some cutting fluid to the reamer and cut out the exact 17mm hole size in the bottom plate.
  7. Chamfer the edges of the hole with a 45 degree angle, using a Dewalt drill.
  8. Drill three holes in the triangular pattern into the bottom plate.
  9. Place the part into the EDM machine and set it up for cutting the keyway. Once firmly installed, feed in the program and fill up the tank with de-ionized distilled water, and let the wire cut the keyway.







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