XR2 is a hybrid system with the capability of performing rolling, walking and climbing motions, thus enabling higher maneuverability and adaptability to various terrains. The system is designed for surveillance missions. The rolling motion, being more energy efficient, can be used on relatively flat terrains over long distances, and the walking and climbing motions are incorporated to tackle uneven terrains.

The rolling motion is achieved by an internal gear-pinion wheel mechanism that is driven by servos. The heading can be controlled. The walking and climbing motions allows the robot to traverse through terrains with obstacles of height up to 3 cm.

The XR2 was initially designed with two gear-pinion wheel mechanism and plastic legs. The body was constructed using high grade Aluminum. The current prototype XR2 Gabriel runs on a single gear-pinion wheel mechanism and has also Aluminum material for the legs.With lighter wheel mechanism and stronger leg design, the mobility of the robot is further increased.XR2 Gabriel also includes a wireless PS2 Controller for remote control.

The design conceptualization and implementation of XR2 was done during ME3101 and ME3102 Mechanical Engineering Design modules in collaboration with ST Kinetics under the supervision of Associate Prof Dr. Chew Chee Meng and Mr.Chan Kok Hoe, Ken. The design team consisting of Thien Vui Chia Paul, Rupesh S. Baker, A.Ku.Ganaesh, U.S.Ajay Vignesh, and Souvik De decided to participate in the 2009 ASME Student Mechanism and Robot Design competition. The team has made it to the final with three other teams.

The final round will be held during the 2009 ASME International Design Engineering Technical Conferences, San Diego, California.

Here are some pictures of the SR2 and its creators.