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Published byBraeden Tarlton Modified over 9 years ago
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George Tillinghast, Rebecca Stein, Mike Suriani Tom Dinetta, Jon Richardson
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BattleBots- The Legacy BattleBots IQ competition April 2007 Integrate engineering knowledge and creativity Contact: Nola Garcia –BattleBots IQ Program Director
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Design Problem: To create a battling robot that is both highly maneuverable and formidable in combat. Bot can withstand damage and immobilize opponent
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Design Requirements: Must meet all safety requirements Must weigh between 60lbs and 120lbs Must be mobile and remotely controlled Must protect itself Must be capable of inflicting damage
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Design Wants: Invertible Tank drive Low center of gravity Multiple weapons Electric motors
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Possible Solutions:
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Solution Research: Weapon WedgeHammer Saw Spinner Rammer
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Solution Research: Drive Element Tank drive -Maximum mobility, ultimate simplicity -Utilizes two separate motors for turning Walking -Consume large amounts of power -Easy to Damage
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Solution Research: Electronics Motors -Voltage, power, weight, price Speed Controllers -Range of speeds, tolerance, durability -Popular brands: IFI Robotics, Vantec, 4DQ Radio Controllers -One link for each: motor, weapon, on-off switch
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Preliminary Design + = Inverted Wedge Flipping Robot: -Armor -Flipping Arm -Drive Train -Electronics
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Design: Armor Materials –Titanium Alloy (Exterior) Withstand largest load, smallest weight Difficult to machine –Aluminum (Interior) Protected by Titanium Lightweight, easy to machine Design –Invertible Parallelogram –Ultimate Defense
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Design: Lifting Arm Purpose –Dynamic offensive weapon –Lift and toss an enemy Design –Moves in arc motion –Flush with body Advantages –High offensive damage –“Unlimited” firing cycles
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Lifting Arm – Power Linear Actuators –Background Small power screw Limited only by battery –Requirements High load capacity Reasonable speed –Cost Around $100
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Lifting Arm - Considerations Engineering analysis –Dynamic analysis Define motion of arm Identify necessary dimensions –Stress analysis Identify points of high stress Choose appropriate material
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Design: Drive Train Tank drive –Maximum mobility –Achieve 4 wheel drive Bi-axial support –Wheel protection –Additional support Invertible
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Drive Train - Components Motors –Range in power 3hp to 9hp 2000rpm to 5000rpm –Requires speed reduction Chain and sprocket –High efficiency –Low cost –Easy to configure Minimal precision required
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Design: Electronics Wireless communication between Operator and Bot Converts user commands into motor operations Senses Bot hardware failure Controls the Bot’s Primary weaponry
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Electronics: System Overview 3 3 2 5 1 4
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Electronics: Central Control Unit Microchip PIC18F8520 Code written in C or assembly language Dual control unit: –Basic Hardware Functionality –Specialized Hardware Functionality
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Electronics: Communications and Speed Control RS-422 Modems –900 MHz frequency channel –5 standard channels and 35 “competition” channels Victor 884 Speed Controller –Controls Bot motor functions –Can output 3%-100% of the input power
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Design Schedule and Cost Analysis
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Design Schedule
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Cost Analysis Shell/Body $1,669.00 Lifting Arm $459.00 Drive Train $1,283.00 Electronics $729.24 Total $4,140.00
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Conclusion Design approach will yield a competitive robot -Impenetrable titanium shell -Deadly lifting arm -Invertible wedge defense -Maneuverability and accuracy
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