Slide 1
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.
(Continued)
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.