“Let every man praise the bridge that carries him
over”
--Old English Proverb
"Go on... take a leap"
--the Lost Droid
On January 4, 2004 Spirit touched down on the surface of Mars. The video
images relayed back an inhospitable terrain dotted with large craters and
massive chasms. As man begins his exploration of the farthest reaches of the
solar system, along with his robotic companions, he will need many tools to
conquer the extra terrestrial worlds. Perhaps none more so than the simple
bridge.
Problem Statement
 
Construct a group of robots comprising a minimum of one autonomous robot. The group may have zero or more manually controlled robots.
The objective is to have atleast one of the robots (manually controlled or autonomous) travel across a gap between two raised platforms with the aid of any mechanism.
After crossing the gap, one of the robots must reach a predetermined checkpoint on the other platform.
Robot Specifications
 
Number:
The team of robots MUST consist of a minimum of one autonomous robot.
The team of robots MAY comprise zero or more manually controlled robots.
Hence, the group of robots may comprise any number of robots, provided they can all be housed simultaneously on top of a single platform before the start of the event.
The number of robots used in each round can be varied by the participants.
Dimensions:
Before the event starts, each robot must INDIVIDUALLY fit inside a 35 cm X 30 cm X 30 cm [lxbxh] box.
Once the event commences, any robot can exceed the dimension limit.
Classification:
Autonomous robot is defined as one which navigates and performs tasks without intermediate human intervention and external force once it is activated.
Manually controlled robot is one which can be controlled with the aid of a remote control by participants during its run.
Using robots that DO NOT fall into either of these categories WILL lead to disqualification.
Rules:
 
All robots must initially be placed on the first platform behind a line drawn along the groove. All robots must remain stationary before starting the timer.
The timer will be stopped as soon as one of the robots is positioned completely inside a predetermined square which serves as the checkpoint.
Dimensions of robots can be changed during the course of the event i.e. after the timer starts.
Components of robots are allowed to be left behind on the platforms.
An autonomous robot must perform ATLEAST ONE of the two tasks:
EITHER construct the mechanism to cross a minimum of one gap,
OR reach the checkpoint by navigating autonomously on the checkpoint platform.
It may perform both the tasks as well.
There is no such restriction for manually controlled robots.
The scores for each completed task vary for an autonomous robot and a manual robot. Please refer to the Scoring Rules for details.
During the event, a team can request for a time-out (in case of technical difficulty etc.):
A single time-out will pause the timer for 120 seconds. A penalty of 20 points will be imposed.
During the time-out, the positions of one or more robots are allowed to be changed.
After the time-out, all robots must be replaced back to their original positions as before the time-out.
A maximum of 3 such time-outs can be availed.
In case a robot falls off the edge of a platform the participants have two options:
EITHER reboot the robot by replacing it to its position as at the start of the event. A penalty of 40 points will be imposed.
OR ignore the robot and continue. No penalty will be imposed.
The arena must not be damaged, indented or scratched by any robot at any time or cost.
Use of Lego kits and pre-made car bases is prohibited. Building tools like Zephyr kit can be used.
A standard 230V/50 Hz. AC power supply will be supplied close to the event arena.
Use of voltage converters is allowed. Participants are advised to use connecting wires of adequate length to avoid hassles. Any extension cords, eliminators, adaptors must be arranged by the participants.
Connecting wires that aid the control of manual robots must remain slack during the course of the event.
The decision of the ROBOTiX team shall be final and binding.
Arena Specifications
 
Dimensions:
Each of the raised platforms will be 60 cm in height and 75 cm in width.
The first platform will be 86 cm in length. Length of successive platforms may differ.
All gaps between the edges of any two consecutive platforms shall be less than 55 cm across.
The length of gaps may vary at the time of the event. Under any circumstances the gap length shall be less than 55 cms.
Number of gaps:
All rounds EXCEPT the Final Round WILL HAVE 1 gap only.
The final round WILL have 2 gaps.
Lines and Surfaces:
The top surface of each platform shall be black in colour.
A white coloured line of width 2 cm will run along the length (through the centre) of each platform.
A white line of width 2 cm will run along the preceding edge of the groove. This line will span the entire width of the platform and will also be perpendicular to the centre line.
Checkpoint:
On the last platform a square of side 45 cm will serve as checkpoint.
The sides of the square will be made of white lines of width 2 cm. Two of these sides will be perpendicular to the centre line of the last platform.
A small line of length 8 cm and width 2 cm will be drawn perpendicular to the centre line and placed at the centre of the checkpoint square.
Grooves:
Each groove is a narrow trench along the width of each platform.
Grooves will measure 1 cm across, 5 cm in depth and 75 cm in length.
Grooves will be at a distance of 7 cm from the edge of each platform.
The intermediate platform will have grooves along both gap facing edges.
NOTE: All dimensions will lie within an error margin of 10%.
Arena Pictures
Scoring Rules
 
Score = Maximum Time Allowed - Time Taken + CMS + COS + CPS - Penalty
 
Maximum Time Allowed = 480 seconds x Number of Gaps
Scores will be awarded on completion of each of the following tasks:
Crossing Mechanism Score (CMS): A robot that constructs the mechanism to cross a gap will be awarded this score. Only one robot will be awarded this score for each gap.
An autonomous robot will be awarded 120 points.
A manual robot will be awarded 80 points.
Crossing Over Score (COS): A robot that crosses a gap shall be awarded this score. The first robot to cross a gap will be awarded this score.
An autonomous robot will be awarded 40 points.
A manual robot will be awarded 20 points.
Checkpoint Score (CPS): A robot that navigates to the checkpoint and stations itself successfully inside the square shall be awarded this score. Only the robot that reaches the checkpoint at the earliest time shall be awarded this score.
An autonomous robot will be awarded 40 points.
A manual robot will be awarded 20 points.
Each time-out availed costs 20 points worth of penalty.