ring laser gyro


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ring laser gyro

A highly accurate way to measure change in an angular position or at an angular rate without the use of any mechanically spinning wheel. The ringed laser gyro principle is based on the small frequency difference produced between two laser beams traveling in opposite directions within the ring. When the gyro is rotated, the frequency difference is measured and the data are processed to determine the rotational velocity and the rate of its change with very high accuracy. The main advantages of the laser gyro are that it has no moving parts, does not require any warm-up time, and has a high long-term stability and rate capability. It is insensitive to linear acceleration and provides fine resolution over a full dynamic range. See laser gyro.
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References in periodicals archive ?
In over-simplified terms, the ring laser gyro relies on the accuracy of a number of laser beams impinging on sensors.
Currently, typical IMUs use either Fiber Optic Gyros (FOG) or Ring Laser Gyros (RLG).
These combine a tri-axial accelerometer, tri-axial gyroscope, tri-axial magnetometer, and a pressure sensor in packages smaller and lighter than ring laser gyros. These sensors provide primary data for gimbal stabilization and supplementary data for navigation.
"The state-of-the-art Ring Laser Gyros based high accuracy INS (INS) and Micro Navigation System (MINGS) complementing each other in redundant mode have been incorporated into the missile system in guidance mode," he added.
Besides its unique Zero-lock gyros, it produces spinning mass gyros, ring laser gyros, fiber-optic gyros, micro electro-mechanical system gyros and hemispheric resonator gyros.
(8.) Shiner, L., "How Things Work: Ring Laser Gyros," Air & Space, September 2002.
He has worked on subsurface fractures on mirror substrates, improving position and weapons accuracy, and reducing inertial navigation system drift for ring laser gyros.
The division's products and capabilities include fiber-optic and ring laser gyros, reaction wheel assemblies, position navigation units and fire control and digital battlefield solutions.
For instance, Honeywell's ring laser gyros developed for BMD were used in commercial aircraft such as Boeing's 737s and 777s, with marked improvements in reliability.
The indigenous Ring Laser Gyros based high accuracy INS (RINS) and Micro Navigation System (MINGS) complementing each other in redundant mode have been successfully flown in guidance mode for the first time.