Robot Report Group 7

Outline Introduction Introduction Robot Construction Robot Construction Design Specifications Design Specifications Design Process Design Process Conclusion Conclusion

Problem Build a robot that can safely deliver immobile person through obstacle course Build a robot that can safely deliver immobile person through obstacle course Do it in the shortest amount of time Do it in the shortest amount of time Must climb ramp, cross street, turn corner Must climb ramp, cross street, turn corner Also fight off aggressive animals, climb stairs, and free itself from a sand pit Also fight off aggressive animals, climb stairs, and free itself from a sand pit

Constraints Must not exceed 12in X 12in X 12in Must not exceed 12in X 12in X 12in Must have 3 programs installed on RCX Must have 3 programs installed on RCX Must receive IR message from controller to control stop and go Must receive IR message from controller to control stop and go Defender can not enter the “defense free zone” Defender can not enter the “defense free zone”

A few basic rules Wheelchair or car programs that send out messages will be disqualified Wheelchair or car programs that send out messages will be disqualified No human intervention is allowed during the match No human intervention is allowed during the match Robots must be powered by an electric motor. No fuel engine or rocket propulsion is allowed Robots must be powered by an electric motor. No fuel engine or rocket propulsion is allowed Robots deemed unsafe will be banned from the competition Robots deemed unsafe will be banned from the competition Devices using projectiles (tethered or otherwise), rockets, explosives, open flame, caustic chemicals, fluid or cut-off discs are strictly forbidden Devices using projectiles (tethered or otherwise), rockets, explosives, open flame, caustic chemicals, fluid or cut-off discs are strictly forbidden Flying Robots are not permitted Flying Robots are not permitted

A view of the course

Wheelchair Construction Used Lego Mind storms book Used Lego Mind storms book Changed design many times Changed design many times Double Bumper design Double Bumper design Single gear Single gear Big Wheels Big Wheels

Design Specifications (Wheelchair)

Design Specifications (Car)

Design Specifications (Defender)

Design Process (Wheelchair) 1.0 second turns -> 1.0 sec right and 2.0 second left turns 1.0 second turns -> 1.0 sec right and 2.0 second left turns Normal wheels -> Wheels with purple treads -> Normal wheels Normal wheels -> Wheels with purple treads -> Normal wheels

Design Process (Car) 2 Flat bumpers -> using the wheelchair bumpers for the front. 2 Flat bumpers -> using the wheelchair bumpers for the front. Back bumper didn’t work after a while -> make the robot go slower Back bumper didn’t work after a while -> make the robot go slower Light sensor -> program robot to go forward and then stop when message = 1 Light sensor -> program robot to go forward and then stop when message = 1

Design Process (Defender) Lasso other robots -> complete failure -> dump truck Lasso other robots -> complete failure -> dump truck Dump load forward - > dump load backwards Dump load forward - > dump load backwards Dump in middle of ground -> dump on stairs Dump in middle of ground -> dump on stairs

Performance Results (Wheelchair) Made it to defenders, but not past them up the stairs. Made it to defenders, but not past them up the stairs. Less than we expected Less than we expected Software could have made robot turn less then 2.0 for the left bumper. Software could have made robot turn less then 2.0 for the left bumper. Robot could have been bigger with more clearance to run the defenders over. Robot could have been bigger with more clearance to run the defenders over.

Performance Results (Car) Success. Success. Went back and forth and stopped soon after the IR message. Went back and forth and stopped soon after the IR message. Better than we expected. Better than we expected. Success due to simple programming Success due to simple programming Would use two double bumpers next time Would use two double bumpers next time

Performance Results (Destroyer) Success. Success. Stopped car single- handedly almost every time. Stopped car single- handedly almost every time. Success mainly due to Hardware design. Success mainly due to Hardware design. Dumping Backwards on the stairs helped it succeed. Dumping Backwards on the stairs helped it succeed. Next time we would figure out how to dump slower. Next time we would figure out how to dump slower.

Conclusion Overall, we met all criteria and goals except for getting our wheelchair past defenders. Overall, we met all criteria and goals except for getting our wheelchair past defenders. Our main successes: Our main successes: Dumping crap on stairs works great Dumping crap on stairs works great Avoiding using a light sensor makes things easier Avoiding using a light sensor makes things easier Our failures: Our failures: Thinking that just a turning program will make it past defenders. Thinking that just a turning program will make it past defenders.