Document No. P647/D1 Standard Specification Format Guide and Test Procedure for Single Axis Laser Gyros (August 2002)

Prepared by the Gyro and Accelerometer Panel (GAP) of the IEEE Aerospace and Electronic Systems Society (AESS).This standard defines the requirements and test procedures for a single axis laser gyro in terms unique to the laser gyro. The requirements contained herein cover applications where the laser gyro is used as an angular motion sensor in navigation and control systems.This standard is a complete revision of IEEE Standard 647-1981. In 1987, the Gyro and Accelerometer Panel recognized the many technical advances that had occurred in ring laser gyro technology and began the revision process. It consists of two parts:Part I is a specification format guide for the preparation of a laser gyro specification. It provides a common meeting ground of terminology and practice for manufacturers and users. The user is cautioned not to over-specify; only those parameters that are required to guarantee proper instrument performance in the specific application should be controlled. In general, the specification should contain only those requirements that can be verified by test or inspection. Parameters in addition to those given in this
standard are not precluded.
Part II is a compilation of recommended procedures for testing a laser gyro. These procedures, including test conditions to be considered, are derived from those currently in use. For a specific application, the test procedure should reflect the requirements of the specification; therefore, not all tests outlined in this standard need be included, nor are additional tests precluded. In some cases, alternative methods for measuring performance characteristics have been included or indicated.Annex A lists various laser gyro design features for which this format is applicable. The list is not intended to make any suggestion regarding the selection of particular design features that might restrict the free choice of manufacturers.
Annex B is an overview of dynamic and stochastic modeling.
Annex C is an overview of noise process variance analysis as a method for determination of the drift rate coefficients and the quantization coefficient.