PRESENTED BY NATARAJU

INTRODUCTION Robotic combat-fight each other using weapons & tactics Robot design involves laws of physics,knowledge of curren,voltage,accleration,design of primemovers,chassis etc

WAR ROBOTS Drive train Prime movers The chasis Arm movement PWM motor control Radio control Active weapons

DRIVE TRAIN Type of drive train Direct drive Gear box Gears and pulley Traction method

Advantages of using Gear box motor characteristics can be changed to suit the required output characteristics. the gear and pulley method required the separate gears to be aligned correctly gearbox there is only one alignment stage thus reducing the chances of errors.

Traction method

Advantages  Uniqueness  Improved traction  No more than two drive motor  appearance

PRIME MOVERS To convert some form of energy into a rotational movement The choice and sizing of the prime mover was a vital role within the project

75PX985 MOTOR FEATURES the mechanical dimensions of the motor the weight of the motor was only 7.6 kg

Comparison The following tables indicates comparison of the selected motor with the calculated motor

THE CHASIS  Weight must be as less as possible  Steel taken as chasis material  Steel is the most commonly used engineering material  It has high yield strength and relative cheapness  It can absorb a great deal of impact energy before failure

Base Medium Density Fiberboard (MDF) was identified as the most appropriate material The material is both rigid and facilitates the use of screws and bolts

Arm integration

Chasis lid Polycarborate shee (6mm) thik is used. Advantages  Excellent resistance o heat and impact

Ground clearance Prevention  Base of he chasis should be rigid  Ground clearance of 5mm should be provided

ARM MOVEMENT Two hydraulic pistons are provided Exact positioning depend on dimensions and sroke lengths

Design & manufacture Offers a great variety of attack angle enormous power. Construction is quick, simple and cheap.

PWM MOTOR CONTROL Uses D.C. motors Switching circuit in pulses Run in both the direction Switching circui is required Mosfets is used

Conduction takes place by both holes and electrons To control D.C. motor in four quad.bi-directional current is used it uses H-bridge circuit Short delay is added in between switch on-off between two mosfets Mosfets is controlled by PIC16F84 chip

Circuit diag.

Cont… Ramp controls motor acc.&deacc.

RADIO CONTROL 3 TYPES OF MOTION CONTROL  Three commands (reverse, off, farwards)  Progressive scheme (a pair of increase speed& reduce speed button)  Proportional scheme(user operate a pair of control joysickwhich trasmit velocity command,rapid acceleration and deacceleration.

Weapon control

Arm control Circuit representation of valve

Category of control valve Directional poppet valves Directional spool valve (no auxiliary force for switching)

TYPES OF WAR ROBOTS 1)Panic attack: Low centre of gravity Difficult to overturn

2) Road block Zero turning circle Weapon is circular saw two wheeled design

3) Razor Using crushing mechanism Damage opponent body shell

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