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GUIDED BY CH.UDAYA BHASKAR M.TECHASSIST. PROFESSOR

A PRESENTATION ONADAPTIVE MISSILE GUIDANCE USING GPSPRESENTED BYK.SAINATH11C11CA04A4ANURAG ENGINEERING COLLEGE(Accredited by NBA, Approve by AICTE, New Delhi, Affiliated to JNTU. Hyderabad)Ananthagiri(V), Kodad(M), Nalgonda(Dt)DEPARTMENT OF E.C.E.

Contents

IntroductionHistoryWhat is missile guidanceTypes of missile guidanceIntroduction to GPSWhat are the elements of GPSIntroduction to DGPSMissile Guidance using GPSActual Working of GPS Guidance SystemHow does GPS finds the exact target locationGuidance EquipmentsConclusion

ADAPTIVE MISSILE GUIDANCE USING GPS is a modern approach in wireless communication.

For the day to day world of wars and battles, the new techniques to throw an attack on the opposing team are emerging immensely. This had led to the development of various types of guided missiles.

Introduction

American rocket pioneerRobert Goddard.experimented with rudimentarygyroscopic systems. The systems entered more widespread use with the advent ofspacecraft,guided missiles, and commercialairliners.History

Missile guidancerefers to a variety of methods of guiding amissileor aguided bomb to its intended target. The missile's target accuracy is a critical factor for its effectiveness.

What is Missile Guidance???

On the battlefield of today, guided missiles are guided to or acquire their targets by using:Radar signal,Wires,Lasers (or),Most recently GPS.

Types of Missile Guidance

6TheGlobal Positioning System(GPS) is a space-basedsatellite navigation system that provides location and time information in all weather, anywhere on or near the Earth, where there is an unobstructed line of sight to four or more GPS satellites.

Introduction to gps

GPS has three parts: the space segment, the user segment, and the control segment. The space segment consists of a constellation of 24 satellites plus some spares, each in its own orbit 11,000 nautical miles above Earth.

What are the Elements of GPS ?

Differential Global Positioning System (DGPS) is an enhancement to Global Positioning System (GPS), that provides improved location accuracy, from the 15-meter nominal GPS accuracy to about 10 cm in case of the best implementations.

Introduction To dgps

The central idea behind the design of DGPS/GPS/inertial guided weapons is that of using a 3-axis gyro/accelerometer package as an inertial reference for the weapon's autopilot.

Missile guidance using gps

Such weapons are designated as "accurate" munitions as they will offer CEPs (Circular Error Probable) of the order of the accuracy of GPS P -code signals, typically about 40ft.

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An inertial navigation system (INS) is a navigation aid that uses a computer, motion sensors and rotation sensors (gyroscopes) to continuously calculate via dead reckoning the position, orientation, and velocity (direction and speed of movement) of a moving object without the need for external references.

Actual working of gps guidance system

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The Missile guidance using GPS uses this Inertial Navigation System as its basic concept.

Continued

In the figure at left, the dashed lines show the actual intersection point, and the gray bands indicate the area of uncertainty.

In this diagram, the solid lines indicatewhere the GPS receiver "thinks" the target is located. Because of errors in thereceiver's internal clock, these spheres donot intersect at one point.How does GPS finds the exact position of the Target??

ContinuedThe GPS receiver must change the size of the spheres until the intersection point is determined. The relative size of each sphere has already been calculated, so if the size of one sphere is changed, the other spheres must be adjusted byexactly the same amount.

Internal srtucture of the guided missile

Target shoot by using GPS.

The way these the subsystems are distributed between the missile and the launcher result in two different categories:Remote Control Guidance: The guidance computer is on the launcher. The target tracker is also placed on the launching platform.Homing Guidance: The guidance computers are in the missile and in the target tracker.

Guiding equipments

Why GPS GUIDANCE???The GPS receiver catches the change in the size of the spheres until the intersection point is determined.

CONCLUSIONThus, after overall view of all the missile guidance systems we come to an conclusion that Adaptive Missile Guidance Using GPS is the most efficient method to chase any target as it saves economical losses, environmental losses & various other losses which were faced during early wars.