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Topic: Inertial guidance system

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	Inertial guidance system - Wikipedia, the free encyclopedia
		An inertial guidance system consists of an Inertial Measurement Unit (IMU) combined with control mechanisms, allowing the path of a vehicle to be controlled according to the position determined by the inertial navigation system.
		A typical inertial navigation system uses a combination of roll, pitch and azimuth gyroscopes, to stabilize the x, y and z accelerometers to solve a large set of differential equations to convert these readings into estimates of velocities, position and attitude, starting off from a known initial position of latitude and longitude.
		Inertial guidance systems are now usually combined with satellite navigation systems through a digital filtering system.
	en.wikipedia.org /wiki/Inertial_guidance_system (2183 words)

	Gemini Press Reference Book
		Guidance in the ascent mode serves a backup function in the event of malfunction of the radio guidance system (RGS).
		Between orbit insertion and reentry, the inertial guidance system is operated in the catch-up mode.
		This capability is provided through the use of the inertial guidance system to develop steering commands for proper orientation of the aerodynamic lift vector arising from an offset center of gravity position.
	www.apollosaturn.com /geminiNR/sec5.htm (3168 words)

	Inertial Guidance (Site not responding. Last check: 2007-11-07)
		Inertial guidance is a method of navigation used to guide rockets and airplanes, submarines, and other vehicles.
		Unlike other methods of navigation, inertial guidance does not rely on observations of land or the stars, on radio or radar signals, or on any other information from outside the vehicle.
		Without inertial guidance, a pilot has to rely on compasses or on signals from radio beacons at known positions on the ground to be sure the airplane is flying in the right direction.
	www.worldbook.com /features/aviators/html/av17.htm (784 words)

	LM News Reference: Guidance, Navigation and Control
		Inertial guidance systems are based on measurements made by accelerometers mounted on a structure called the stable member or platform.
		The inertial measurement unit is mounted to the legs on one end and the telescope and the abort sensor assembly are mounted on the opposite side.
		Inertial stability of the stable member in the inertial measurement unit is maintained with a stabilization loop which uses the IMU gyro outputs as inputs to amplifiers in the power and servo assy.
	www.apollosaturn.com /Lmnr/gn.htm (14290 words)

	Inertial Measurement Unit - Wikipedia, the free encyclopedia
		An Inertial Measurement Unit is a closed system that is used to detect attitude location and motion.
		Other systems such as GPS (used to correct for long term drift in position), a barometric system (for altitude correction), or a magnetic compass (for attitude correction) compensate for the limitations of an IMU.
		This is why a lot of engineers don't really make a distintion between an IMU and an inertial guidance system.
	en.wikipedia.org /wiki/Inertial_Measurement_Unit (588 words)

	NASM Oral History Project, Burnett #2
		The earliest one I worked on was the ARMA guidance system, which was an all-inertial system that was to be used on the Thor and as a backup on the Atlas.
		In fact, it was the original backup to the GE guidance system, which had the radar on the ground and a bit of a platform in the missile.
		Guidance ought to have the equipment that moved the nozzles, and ought to have the cabling and connects through the raceways into the guidance system, from each one of the stages.
	www.nasm.si.edu /research/dsh/TRANSCPT/BURNETT2.HTM (13464 words)

	inertial guidance system -- Encyclopædia Britannica (Site not responding. Last check: 2007-11-07)
		Inertial guidance was installed in long-range ballistic missiles in the 1950s, but, with advances in miniaturized circuitry, microcomputers, and inertial sensors, it became common in tactical weapons after the 1970s.
		Inertial systems involved the use of small, highly accurate gyroscopic platforms to continuously determine the position of the missile in space.
		The major parts of the system are the lymph nodes, tonsils, thymus, spleen, and lymphatic vessels; additional lymphatic tissue is found in isolated patches in the gastrointestinal tract, lungs, and bone marrow.
	www.britannica.com /eb/article-9042380?tocId=9042380 (799 words)

	[No title] (Site not responding. Last check: 2007-11-07)
		The system 100 includes a launch tube (or launcher) 10 from which a missile 20 is launched in the general direction of a target 30.
		The guidance system 500 of the present invention includes an antenna 510, an RF link receiver 520 and a flight computer 530 which performs guidance computations and autopilot functions as per the conventional system depicted in Fig.
		Unlike the conventional guidance system 500', the guidance system 500 of the present invention uses an inertial navigation system 560 to guide the missile directly with the OGS 50 used indirectly for course correction and inertial instrument (ISA) calibration.
	www.wipo.int /cgi-pct/guest/getbykey5?KEY=00/52413.011011&ELEMENT_SET=DECL (2571 words)

	Search Results for guidance - Encyclopædia Britannica
		electronic system that continuously monitors the position, velocity, and acceleration of a vehicle, usually a submarine, missile, or airplane, and thus provides navigational data or control without...
		By established principles of mathematical physics, the velocity of an object is defined as the rate of change of its position, and the acceleration is defined as the rate of change of the velocity.
		Inertial guidance was installed in long-range ballistic missiles in the 1950s, but, with advances in miniaturized circuitry, microcomputers, and inertial sensors, it became common in tactical weapons...
	www.britannica.com /search?query=guidance&submit=Find&source=MWTAB (445 words)

	Inertial guidance system at opensource encyclopedia (Site not responding. Last check: 2007-11-07)
		Inertial guidance systems were originally developed for the navigation of ICBMs.
		All inertial navigation systems suffer from integration drift, as small errors in measurement are integrated into progressively larger errors in position and velocity.
		The desire to use inertial guidance in the minuteman missile and Apollo program drove early attempts to miniaturize computers.
	www.wiki.tatet.com /Inertial_navigation_system.html (1373 words)

	Gemini Inertial Guidance System
		The major change in the flight control system from Titan II missile to Gemini launch vehicle was substitution of the General Electric Mod IIIG radio guidance system (RGS) and Titan I three-axis reference system for the Titan II inertial guidance system.
		The digital computer was the heart of the spacecraft's guidance and control system; supplementary equipment consisted of the incremental velocity indicator (which visually displayed changes in spacecraft velocity), the manual data insertion unit (for inserting data into, and displaying readouts from, the computer), and the auxiliary computer power unit (to maintain stable computer input voltages).
		This was followed by the Joint Guidance and Control Test, completed Novenber 12, which established proper functioning of the secondary guidance system, comprising the spacecraft inertial guidance system and the launch vehicle's secondary flight control system.
	www.astronautix.com /craft/gemystem.htm (1274 words)

	Controlling Satellites
		In order to do this, some systems use small bursts from the rocket engines which are placed around the satellite.
		Guidance systems are also a very important part of controlling satellites.
		"In the radio-command guidance system, changes in velocity and direction are broadcasted by the spacecraft to a station on the ground.
	www.smgaels.org /physics/97/MPEKNIC.HTM (526 words)

	Poseidon C3 - United States Nuclear Forces
		It is equipped with the missile all inertial guidance system, a solid-propellant gas generator PBCS and RVs.
		Thus the principal area of development involved flight of the ES with the guidance system and reentry vehicles after they had separated from the booster.
		The ES's solid-propellant gas generator and associated steering capability allowed the guidance system to maneuver the ES and to eject reentry vehicles into ballistic trajectories to individual aim points.
	www.fas.org /nuke/guide/usa/slbm/c-3.htm (941 words)

	Airline Inertial Guidance Systems (Site not responding. Last check: 2007-11-07)
		In the event that the position where the aircraft now is, is not the position where it wasn't, the Inertial Guidance System has acquired a variation.
		If the variation is considered to be a factor of significant magnitude, a correction may be applied by the use of the autopilot system.
		However, use of this correction requires that the aircraft now knows where it was because the variation has modified some of the information which the aircraft has, so it is sure where it isn't.
	ifaq.wap.org /science/inertialguidance.html (232 words)

	The 6555th, Chapter III, Section 4, The Thor Ballistic Missile Test Program
		The principal contractors were Douglas Aircraft Company (for the airframe), Bell Telephone Laboratories (for the radio-inertial guidance system), A.C. Spark Plug (for the more advanced all-inertial guidance system), General Electric (for the nose cone) and North American Aviation (for the rocket motors).
		Guidance system tests began with a partially successful THOR flight from Pad 17B on 7 December 1957.
		The third nose cone test was flown successfully on June 13th, and a THOR tactical launcher performed well during a guidance system test launch offsite (e.g., Pad 18B) on 4 June 1958.
	www.globalsecurity.org /space/library/report/1991/6555th/6555c3-4.htm (991 words)

	Inertial mouse system (US4787051) (Site not responding. Last check: 2007-11-07)
		A hand-held inertial mouse provides input data to a computer from which the computer can determine the translational and angular displacement of the mouse.
		Pairs of these accelerometers are positioned to detect acceleration along each axis of a cartesian coordinate system such that an angular acceleration of the mouse about any axis of rotation causes representative differences in the magnitudes of the output signals of one or more of these accelerometer pairs.
		Inertial guidance system for vertically launched missiles without roll control
	www.delphion.com /details?pn10=US04787051 (361 words)

	[No title]
		Their operational checks were in fact systems integration checks; the maintenance complex, usually miles away, did not have the ability to check the working-together aspects of, for example, the guidance and the flight controls systems.
		We trained on “A” versions of the guidance system, got some more FTD instructions, and tried to figure out why we were responsible for ground support air-conditioners, and the purpose for the “suitcase”.
		In order for the guidance system to function properly, its environment had to be maintained within a narrow temperature range.
	www.homestead.com /TACMissileers/files/Kadena_.htm (2524 words)

	Invent Now \| Hall of Fame \| Search \| Inventor Profile
		Aeronautical engineer and university professor Charles Stark Draper developed gyroscope systems that stabilized and balanced gunsights and bombsights, which were later expanded to an inertial guidance system for launching long-range missiles at supersonic jet targets.
		Success led to gyroscopic-balanced bombsights, which were later expanded to the inertial guidance system for missiles.
		Draper subsequently developed the Spatial Inertial Reference Equipment (SPIRE) system for automatic aeronautical navigation-a system he later refined and miniaturized for use in the Polaris submarine missile system.
	www.invent.org /hall_of_fame/1_1_6_detail.asp?vInventorID=46 (189 words)

	Small Times: News about MEMS, Nanotechnology and Microsystems
		The military's ultimate goal is to produce an inertial guidance system that can be combined with a Global Positioning System (GPS), is small enough to fit in an artillery shell, tough enough to be shot from guns and cheap enough to buy by the hundreds of thousands.
		The main use for MEMS in smart munitions is in the IMU that lies at the heart of an inertial guidance system.
		The Inertial Measurement Unit for the ERGM comes from BAE Systems, a British company, while Interstate Electronics provides the IMU for Excalibur.
	www.smalltimes.com /document_display.cfm?document_id=4701 (691 words)

	Howstuffworks "How Smart Bombs Work"
		Both the GPS receiver and the inertial guidance system allow the bomb to locate itself in space.
		According to the U.S. Air Force, the system is accurate to within 40 feet (13 meters).
		This system works fine even in bad weather, because the JDAM gets all its information from satellite signals, which aren't blocked by cloud cover or obstacles.
	people.howstuffworks.com /smart-bomb3.htm (404 words)

	MHIA Online - Members and Their Products - AGVS Case Studies
		These non-wire inertial guided vehicles travel along 7,000 feet of "virtual" guidepath transporting steel coils weighing up to 100,000 pounds between 35 coil stands located at various process areas.
		The VCC-2 is the brain behind the inertial guidance system that also uses a solid state gyroscope and the supplier's location technology to accurately maintain the AGV's path of travel.
		The vehicles use automatic opportunity charging which the supplier's engineers determined to be the most effective battery charging system for this massive facility.
	www.mhia.org /psc/casestudies/agvs/cec3.cfm (318 words)

	[No title]
		The missile uses a strapdown inertial guidance system on the warhead section which guides the trajectory using small thrusters.
		It has been suggested that in the future the DF-15 will be equipped with a global positioning system that is coordinated with a new-type ring-laser gyroscopic inertial-guidance system, coupled to a faster on-board computer system so as to increase the accuracy of the missile's end-segment guidance system to achieve a CEP of 30-45 meters.
		As the missile has a terminal velocity of over Mach 6 this system may be considered for deep-penetration strike requirements (against underground fortifications).
	dr.abdulqadeer.8m.net /df15.htm (446 words)

	R-36 / SS-9 SCARP - Russian / Soviet Nuclear Forces
		The missile-uses an all-inertial guidance system and according to Western estimates had a CEP of 0.4 to 0.5 nm.
		In order to increase accuracy the guidance system was originally planned to encompass a combination of an autonomous inertial system and radio-control.
		According to Western estimates, the initial operational capability for the SS-9 system, with both the Mod 1 and Mod 2 single reentry vehicle variants was reached in early 1966.
	www.fas.org /nuke/guide/russia/icbm/r-36.htm (958 words)

	Skate surfaces at Pole (Site not responding. Last check: 2007-11-07)
		It was a great idea, but no one is prepared to mess with our only navigation tool, the Inertial Guidance System, at this time so we hold to a straight course.
		The fear of tinkering with the Inertial Guidance System is the same reason we do not attempt to surface at the North Pole.
		The Inertial Guidance System readout that was indicating North is now indicating South.
	www.nautilus571.com /skate_surfaces_at_pole.htm (222 words)

	How to Stay On Track With Your Real Estate Goals
		But the corrective features of the plane's inertial guidance system continually alter the plane's direction and flight to ensure its timely arrival in Los Angeles.
		If you check-in with yourself at least once a month you minimize the chances of becoming one of those agents who finally realizes around October of each year that all they need to achieve their income goal for the year is to find a $25,000,000.00 transaction and close both sides of it by December 31st.
		Develop an inertial guidance system that continually keeps you on track as much as possible in your real estate business.
	realtytimes.com /AgentUpdate/pages/1.28_6goals.htm?open&ID=titlefirst_dickfagan (440 words)

	Titan 1 Chronology (Site not responding. Last check: 2007-11-07)
		Bell Telephone Laboratories had the contract for the missile's radio-inertial guidance system, and American Bosch and MIT were under contract for the all-inertial guidance system.
		Contract awarded for inertial guidance system for the Titan ICBM to American Bosch Arma by the USAF.
		Titan 1 (M-4) carrying Titan II guidance system.
	www.geocities.com /titan_1_missile/chronology.htm (1975 words)

	Air-Launched Cruise Missile AGM-86B
		Powered by a Williams International turbofan engine, the missile navigates with an inertial guidance system.
		The missile's terrain contour-matching guidance system was replaced by a global positioning system (GPS) that would integrate with the existing inertial navigation computer system.
		In September 1987, Boeing received the maximum incentive award as well as a reward of maintenance pool funds for completing the ALCM Availability Guarantee program two years ahead of schedule.
	www.angelfire.com /ny/USAircraft/missiles/AGM86B.html (459 words)

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