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Topic: Missile guidance


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In the News (Fri 1 Aug 14)

  
  Missile guidance - Wikipedia, the free encyclopedia
Missile guidance technologies of missile systems use a variety of methods to guide a missile to its intended target.
Stellar-inertial guidance was first used in the American Poseidon missile and uses star positioning to fine-tune the accuracy of the inertial guidance system after launch.
TERCOM is the typical system for cruise missile guidance, but is being supplanted by GPS systems and by DSMAC, Digital Scene-Matching Area Correlator, which employs a camera to view an area of land, digitizes the view, and compares it to stored scenes in an onboard computer to guide the missile to its target.
en.wikipedia.org /wiki/Missile_guidance   (1195 words)

  
 MOD:Rylix:Missiles - VsWiki
Short range missiles usually use non-autonomous guidance systems, both to increase the safety of the weapons in short range combat and also to carry a larger payload; autonomous versions are available, but are not extremely effective.
Cruise missiles (CMs) are generally the largest type of missile, and are made to travel extended ranges and for a much longer duration.
The range of missiles with this guidance system is normally limited to about 10km due to the length of the wire.
vegastrike.sourceforge.net /wiki/Missiles   (1980 words)

  
 Aerospaceweb.org | Ask Us - Missile Guidance
Missile guidance concerns the method by which the missile receives its commands to move along a certain path to reach a target.
The missile sensor or seeker, on the other hand, is a component within a missile that generates data fed into the missile computer.
Missiles like JSOW and the JDAM series of guided bombs make use of GPS signals to determine where they are with respect to the locations of their targets.
www.aerospaceweb.org /question/weapons/q0187.shtml   (2451 words)

  
 .: World Missile Systems Online  |  AMI International | About WMSO :.
Missile guidance systems were expensive enough that very few mass weapons had much potential for guidance.
Often guidance is needed because the earlier weapon was useful only with a mass-destruction warhead (nuclear or chemical) which is no longer considered acceptable.
By Mission:Each missile is typed as having one of eight primary missions.
www.worldmissiles.com /about.html   (499 words)

  
 Heat-Seeking Missile Guidance
The guidance and control systems of the missile occupy it's nose section, the guidance senses the position of the target and issues commands to the servoes in the control section which then actuate the control surfaces to achieve the desired flightpath correction.
The vast majority of operational IR guided missiles employ a canard control surface/tail stabiliser configuration, the type of canard employed usually betraying the particular emphasis placed during design, eg the stabilising fins fore of the canards on the R.550 serve to prevent stalling at high angles of attack.
The guidance system itself commonly consists of a window/filter assembly in the nose of the weapon, this serves to select only particular wavelengths of IR, these then enter an optical modulation system, a reticle or chopper, which enables a detector element to receive IR emissions from the target, while rejecting clutter.
www.ausairpower.net /TE-IR-Guidance.html   (3749 words)

  
 Missile Components
The guidance section is the brain of the missile.
The elements for missile guidance and missile control can be housed in the same section of the missile, or they can be in separate sections.
A homing guidance system is one in which the missile seeks out the target, guided by some physical indication from the target itself.
www.ordnance.org /missile_components.htm   (1290 words)

  
 SYSTEM HISTORY AND DESCRIPTION
The function of an air defense guided missile system is to deter or minimize the effects of enemy attacks by detecting and destroying enemy aircraft and missiles approaching a defended area.
A missile tracking radar system acquires a missile while it is still on the launcher, tracks the missile in flight, and transmits steering and warhead burst orders to the missile.
Missiles used in the surface-to-surface mission were to be capable of delivering nuclear warheads.
www.nikemissile.org /system_history_and_description.htm   (1360 words)

  
 Types of Guidance
Guidance systems are usually classified according to their path control system, since many missiles use the same type of attitude control.
These commands are transmitted to the missile by varying the characteristics of the missile tracking or guidance beam, or by the use of a separate radio uplink transmitter.
The missile, throughout its flight, is between the target and the radar that illuminates the target.
www.tpub.com /fcv2/11.htm   (1142 words)

  
 ACTIVE AND SEMIACTIVE RADAR MISSILE GUIDANCE
The source of the reflected radiation is a radar transmitter; in the instance of weapons with active radar guidance, this transmitter is situated within the missile; in the case of semiactive guidance, it is carried by the launch aircraft.
In the mid-fifties, when it was decided to develop radar guidance for air-air missiles, it was impossible, with state of the art technology, to package a radar transmitter and receiver of the appropriate range into a medium sized missile.
The missile receives this energy and uses it to guide in within the range of its own radar, which is then used for the terminal phase.
www.ausairpower.net /TE-Radar-AAMs.html   (3295 words)

  
 THE GUIDANCE OF SPACE VEHICLES
The guidance process consists of measurement of vehicle position and velocity, computation of control actions necessary to properly adjust position and velocity, and delivery of suitable adjustment commands to the vehicle's control system.
For ballistic missiles, guidance (sometime referred to as ascent guidance) is used only during powered flight, and guidance accuracy depends upon accurate establishment of flight conditions at the point of transition from powered to free flight.
When a suitable combination of position and velocity is reached, the guidance system must immediately signal cutoff of the propulsion system-in fact, it must signal cutoff a little ahead of time on the basis of a prediction process to compensate for time lags in the operation of engine controls.
www.hq.nasa.gov /office/pao/History/conghand/guidance.htm   (2659 words)

  
 Phase World Missiles
Missiles can be used to hit targets beyond their maximum range because missiles will travel in a straight line one they run out of energy.
Missiles are not affected by the maximum speed like starships are because the missile's lifespan after the launch is brief enough that radiation and particle damage is not a factor.
Brilliant missiles are more capable then smart missiles and have +7 to strike and +6 to dodge and providing that they can catch their target multiple times, they have three attacks per melee until they run out of fuel.
www.kitsune.addr.com /Rifts/Rifts-Equipment/PW_Missiles.htm   (3642 words)

  
 Colonial Missile Technology
Missiles are now used across the planet by all of the Human factions in one form or another.
All of the same basic missile and bombs sizes are available to the Human factions, except for the Intercontinental ballistic missile, which only the University of Planet faction has the capability of building, but has never done so.
In addition, all cruise missiles are considered key strategic assets and their use is strictly controlled by the government of each faction; there is no chance that player characters would be able to get their hands on one in the near future.
homepage.mac.com /cheethorne/alphacentauri/humanmissiles.htm   (652 words)

  
 Army Technology - Javelin - Anti-Armour Missile
The missile is equipped with an imaging infrared seeker which is based on a cadmium mercury telluride (CdHgTe) 64 x 64 staring focal plane array in the 8 to 12 micron waveband.
The missile is mounted on the CLU and the gunner engages the target using the sight on the CLU, by placing a curser box over the image of the target.
Once the missile is clear, the larger propellant in the second stage is ignited and the missile is propelled towards the target.
www.army-technology.com /projects/javelin   (1001 words)

  
 Trident II D-5 Fleet Ballistic Missile FBM / SLBM - United States Nuclear Forces
The mostly-common missile was a variant to this common missile where, for Air Force application, a unique propulsion stage was used between the common first stage and second stage to configure a longer three-stage missile with increased range/payload performance.
The flight test program of the missile and the guidance subsystems of the weapon system began in January 1987, and the overall performance results from the tests indicated that the missile was achieving its objectives for this phase of the program.
During the 13th flight, the missile encountered a problem with the thrust vector control subsystem on its first stage, causing it to lose control and go off course about 55 seconds into flight.) The missile was destroyed by the range safety officer for safety reasons.
www.fas.org /nuke/guide/usa/slbm/d-5.htm   (4528 words)

  
 Nag ATGM
The missile uses a tandem HEAT (High Explosive Anti Tank) warhead to penetrate ERA (Explosive Reactive Armour) or composite (Chobham type) armour that is found in the latest tanks [2].
It carries four missiles in a ready-to-fire mode on the turret and more missiles can be reloaded without exposing the crew on the battlefield.
Missile guidance is initially by area correlation around the target, then by centroid tracking.
www.bharat-rakshak.com /MISSILES/Nag.html   (877 words)

  
 Invid Missiles
Missiles were not normally used by the Invid and had never been part of their standard tactics.
The newest Invid missile was an almost total unknown to the REF forces until the arrival of the Jupiter Attack Group.
This missile was developed during the last days of the Third Robotech War to battle the more heavily armed and armored forces of the REF. It is a vast improvement over previous missile designs, but this made it more expensive to produce, which limited its numbers.
homepage.mac.com /cheethorne/Robotech/earlyinvidmissiles.htm   (1204 words)

  
 Missile Guidance
Infra-Red homing is used mainly by missiles designed to destroy aircraft, the target aircraft’s exhaust shining like a beacon to the infra-red sensor in the nose of the missile.
The missile guidance system uses the data from the infra-red sensor to decide when an alteration in missile trajectory is required.
If the missile is unable to find a specific target due to ground interference, (damage to buildings causing unexpected height readings) it can fly around in a search pattern until it finds the intended target, perhaps from a different approach route.
www.rafmuseum.org.uk /cosford/collections/missiles/guidance_2.cfm   (263 words)

  
 Air to air homing missile guidance (US6244536)
An air to air homing missile guidance algorithm based on a state-dependent Riccati equation solution of a spherical-based nonlinear intercept representation of the intercept kinematics problem.
Missile and target acceleration tolerant, azimuth channel and elevation cross-channel coupling-inclusive air to air homing missile guidance apparatus comprising the combination of:
missile guidance algorithm apparatus located intermediate said sensor elements and said autopilot apparatus and generating elevation channel and azimuth channel missile command signals, signals responsive to trajectory changes of said missile and said target;
www.delphion.com /details?pn10=US06244536   (709 words)

  
 AGM-88 HARM (high-speed antiradiation missile) - Smart Weapons
Guidance is provided through reception of signals emitted from a ground-based threat radar.
The AGM-88B missile was developed in the mid 1980s and incorporated an electronically reprogrammable memory that allowed changing the missile software in the field.
The CLC receives target data from the missile and onboard avionics, processes the data for display to the aircrew to the appropriate display, determines target priority, and collects aircraft data for pre-launch hand-off to the AGM-88 HARM missile.
www.fas.org /man/dod-101/sys/smart/agm-88.htm   (2088 words)

  
 ATI's Modern Missile Analysis course
Missile propulsion, warheads, autopilots, guidance, control, seekers, and simulation are covered.
Emphasis is on autopilots, homing guidance and seekers and their interaction.
Missile propulsion and control in the atmosphere and in space.
www.aticourses.com /missile_systems_analysis.htm   (332 words)

  
 Case Study: Missile Guidance System (Aerospace Blockset)
For example, the Guidance Processor state chart, which is part of the Guidance subsystem, shows the actions the system takes in response to either a loss of lock on the target or a failure to acquire the target's position during the target search.
This form of guidance law has been used in guided missiles since the 1950s, and can be applied to radar-, infrared-, or television-guided missiles.
The navigation law requires measurements of the closing velocity between the missile and target, which for a radar-guided missile can be obtained using a Doppler tracking device, and an estimate for the rate of change of the inertial sight line angle.
www.weizmann.ac.il /matlab/toolbox/aeroblks/aero_st5.html   (667 words)

  
 Case Study: Missile Guidance System (Aerospace Blockset)
Running the guidance simulation demonstrates the performance of the overall system.
The target is defined to be traveling at a constant speed of 328 m/s on a reciprocal course to the initial missile heading and 500 meters above the initial missile position.
Impact with the target occurred at 3.46 seconds, and the range to go at the point of closest approach was calculated to be 0.26 meters.
www.weizmann.ac.il /matlab/toolbox/aeroblks/aero_st6.html   (112 words)

  
 Missile Guidance for Dummies   (Site not responding. Last check: 2007-10-10)
In the event that the position that it is in is not the position that it wasn't, the system has acquired a variation, the variation being the difference between where the missile is, and where it wasn't.
Because a variation has modified some of the information the missile has obtained, it is not sure just where it is. However, it is sure where it isn't, within reason, and it knows where it was.
It now subtracts where it should be from where it wasn't, or vice-versa, and by differentiating this from the algebraic sum of where it shouldn't be, and where it was, it is able to obtain the deviation and its variation, which is called error.
asuwlink.uwyo.edu /~jimkirk/guidance.html   (288 words)

  
 Army Technology - Patriot Missile - Air Defense System
The target acquisition system in the missile acquires the target in the terminal phase of flight and transmits the data using the TVM downlink via the ground radar to the Engagement Control Station for final course correction calculations.
The command uplink and the TVM downlink allow the missile's flight to be monitored and provide missile guidance commands from the weapon control computer.
As the missile approaches the target, the TVM guidance system is activated and the missile is steered towards the target.
www.army-technology.com /projects/patriot   (1005 words)

  
 Army Fact File - TOW Missile System   (Site not responding. Last check: 2007-10-10)
The TOW (Tube-launched, Optically-tracked, Wire command-link guided) Missile System consists of a tripod, traversing unit, missile guidance set, launch tube, optical sight, battery assembly and any of five missile variations.
The TOW missile system also includes a thermal sight that provides a capability for operations at night, in reduced visibility, and in a countermeasure environment.
TOW missiles are all-up rounds encased in a disposable container.
www.army.mil /fact_files_site/tow/index.html   (229 words)

  
 Wire-guided missile - Wikipedia, the free encyclopedia
A wire-guided missile is a missile guided by signals sent to it via thin wires reeled out during flight.
This guidance system is most common for anti-tank missiles, where its ability to be used in areas of limited line-of-sight make it useful, while the range limit imposed by the length of the wire is not a serious concern.
The Tube-Launched, Optically Tracked, Wire-Guided Missile System (TOW), with a range of 3750 m and the British Swingfire missile, when vehicle launched, with a range of 4000m [1] but it would be unlikely to be used at extreme range.
en.wikipedia.org /wiki/Wire-guided_missile   (531 words)

  
 Iran Missile Milestones - 1985-2004
The missile is believed to be single-stage, liquid-fueled, scaled-up version of North Korea's Nodong missile.
Also on display are five air-to-air missiles, Chinese C-801 and C-802 anti-ship missiles, and three Iranian-built, solid propellant surface-to-surface missiles - the Zelzal-2, the Nazeat, and the Shahin.
February 1999: Iran's defense minister Ali Shamkhani announces that the Shahab-4 missile is in production "not for military purposes, but for launching a satellite." U.S. intelligence reportedly believes the missile is derived from the 1950s-era Soviet SS-4 "Sandel" medium-range missile, which had a maximum range of 2,000 kilometers.
www.wisconsinproject.org /countries/iran/missile-miles04.html   (1196 words)

  
 India's Missile Shopping List
India is still weak in many vital rocket technologies, and needs help in composites, electronics, computers, sensors, navigation, guidance, control and propulsion, according to a Pentagon study which ranks countries' military capabilities.
India has some gyroscopes of its own, but Indian engineers are seeking better equipment "to improve the accuracy and stabilization of their missile systems," says one State Department analyst.
According to the Pentagon, computers play "a pivotal role in the development and deployment of missiles and missile systems." Digital computers can predict the behavior of entire weapon systems and are required to process space-borne sensor data in real time, the study says.
www.wisconsinproject.org /countries/india/india-missile-shopping.html   (348 words)

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