Attitude and Heading Reference Systems

Attitude and Heading Reference Systems

Attitude and Heading Reference Systems or better known as Attitude Heading Reference System (AHRS) are 3-axis sensors that provide heading, attitude and yaw information for aircraft. AHRS are designed to replace traditional mechanical gyroscopic flight instruments and provide superior reliability and accuracy.

AHRS consist of either solid-state or MEMS gyroscopes, accelerometers and magnetometers on all three axes. Some AHRS use GPS receivers to improve long-term stability of the gyroscopes. A Kalman filter is typically used to compute the solution from these multiple sources. AHRS differ from traditional inertial navigation systems by using magnetometer and/or GPS data to correct the raw gyroscopic data.

AHRS have proven themselves to be highly reliable and are in common use in commercial and business aircraft. Recent advances in MEMS manufacturing have brought the price of FAA certified AHRS down to below $15,000. AHRS are typically integrated into Electronic Flight Information Systems (EFIS), which are the central part of so-called glass cockpits. AHRS are often combined with air data computers to form an "air data, attitude and heading reference systems" (ADAHRS), which provide additional information such as airspeed, altitude and outside air temperature.

AHRS manufacturers

*Crossbow Technology Inertial Systems (Inertial +GPS), Attitude Heading Reference Systems (AHRS), Inertial Measurement Units (IMU), Vertical Gyros (VG), Accelerometers, Tilt Sensors, Magnetometers.
*Kearfott Guidance & Navigation Corporation, USA
* [ Systron Donner Inertial]
* [ MicroStrain] Inertial Sensors, Inclinometers and Orientation Sensors
* [ Archangel Systems Inc. USA]
* [ Navionex Inc. Canada]
* [ Litef GmbH]
*Sagem Avionics, Inc.
* [ Watson Industries]
* [ Xsens Technologies]
* [ Sonardyne Marine Inertial Products]
* [ Northrop Grumman Italia S.p.A. (formerly Lital S.p.A.), ITA ]
* [ Innalabs Holding, Inc]
* [ MGL Avionics]
* [ iMAR GmbH]
* [ SBG Systems] MEMS based Inertial Systems, Attitude and Heading Reference Systems (AHRS), GPS Aided AHRS, 2 axis Inclinometers, Static Oriantation Sensors (3D Compass).

Wikimedia Foundation. 2010.

Look at other dictionaries:

  • Attitude indicator — An attitude indicator (ADI), gyro horizon or artificial horizon, is an instrument used in an aircraft to inform the pilot of the orientation of the aircraft relative to earth. It indicates pitch (fore and aft tilt) and bank (side to side tilt),… …   Wikipedia

  • Media and Publishing — ▪ 2007 Introduction The Frankfurt Book Fair enjoyed a record number of exhibitors, and the distribution of free newspapers surged. TV broadcasters experimented with ways of engaging their audience via the Internet; mobile TV grew; magazine… …   Universalium

  • rocket and missile system — ▪ weapons system Introduction       any of a variety of weapons systems that deliver explosive warheads to their targets by means of rocket propulsion.       Rocket is a general term used broadly to describe a variety of jet propelled missiles… …   Universalium

  • Israel and the apartheid analogy — The State of Israel s treatment of the Palestinians has been likened by many to a system of apartheid, analogous to South Africa s treatment of non whites during South Africa s apartheid era. [… …   Wikipedia

  • Deconstruction and Derrida — Simon Critchley and Timothy Mooney DERRIDIAN DECONSTRUCTION1 In the last twenty five years or so, particularly in the English speaking world, no philosopher has attracted more notoriety, controversy and misunderstanding than Jacques Derrida.… …   History of philosophy

  • Business and Industry Review — ▪ 1999 Introduction Overview        Annual Average Rates of Growth of Manufacturing Output, 1980 97, Table Pattern of Output, 1994 97, Table Index Numbers of Production, Employment, and Productivity in Manufacturing Industries, Table (For Annual… …   Universalium

  • Science and mathematics from the Renaissance to Descartes — George Molland Early in the nineteenth century John Playfair wrote for the Encyclopaedia Britannica a long article entitled ‘Dissertation; exhibiting a General View of the Progress of Mathematics and Physical Science, since the Revival of Letters …   History of philosophy

  • Epistles to Timothy and Titus —     Epistles to Timothy and Titus     † Catholic Encyclopedia ► Epistles to Timothy and Titus     (THE PASTORALS)     STS. TIMOTHY AND TITUS     Saints Timothy and Titus were two of the most beloved and trusted disciples of St. Paul, whom they… …   Catholic encyclopedia

  • L-3 SmartDeck — SmartDeck = SmartDeck [ SmartDeck Integrated Flight Controls and Display System] is a fully integrated cockpit system developed by [ L 3 Avionics Systems] . SmartDeck is one of the many systems… …   Wikipedia

  • Electronic Flight Instrument System — An electronic flight instrument system, or EFIS, is a flight deck instrument display system in which the display technology used is electronic rather than electromechanical. EFIS normally consist of a primary flight display (PFD), multi function… …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”