scope:

Foreword

This standard was prepared by the Gyro and Accelerometer Panel of the Aerospace Electronics Systems Society of the Institute of Electrical and Electronics Engineers. It consists of two parts.

Part I is a specification format guide for the preparation of a rate-integrating gyro specification. It provides a common meeting ground of terminology and practice for manufacturers and users. The user is cautioned not to overspecify; 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. Figs 1 and 2 are to be used as a guide for the preparation of specific figures or drawings.

Part II is a compilation of recommended procedures for testing a rate-integrating 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 specifications; therefore, not all tests outlined in this document need be included, nor are additional tests precluded. In some cases, alternative methods for measuring performance characteristics have been included or indicated.

The intent is for the specification writer to extract the applicable test conditions and equipment requirements from Section 9. for inclusion in the appropriate sections listed under Section 4.5. Similarly, it is intended that the writer extract the applicable test procedures from Section 10. for inclusion in the appropriate sections listed under Section 4.6. Part II can also be used as a guide in the preparation of a separate rate-integrating gyro test specification with appropriate section numbering.

Blank spaces in the text of this document permit the insertion of specific parameter values and their tolerances. Brackets are used to enclose alternative choices of dimensional units, signs, axes, etc. Boxed statements are included for information only and are not part of the specification or test procedures. The symbols used conform to IEEE Std 260-1967 , Letter Symbols for Units Used in Electrical Science and Electrical Engineering. Terminology used conforms to Aerospace Industries Association EETC Report 5 (Revision A), Standard Gyro Terminology.

This document defines the requirements and test procedures for a conventional single-degree-of-freedom rateintegrating gyro in terms of characteristics unique to the gyro. The requirements contained herein are intended to cover applications in which the dynamic angular inputs to which the gyro is subjected are benign relative to the accuracy required. This will cover most gimballed platform applications and those nongimballed applications (for example, space vehicle attitude control systems) in which the dynamic inputs are not so severe as to make additional parameters significant. The rate-integrating gyro provides a voltage output proportional to angular displacement of the case about the input axis when in an open-loop mode or when captured by a servoed platform, or a current proportional to angular rate about the input axis when captured through an external loop using the gyro torquer. A model equation is given in Section 6.3 for reference, to be included in a specification only to the extent necessary.

Appendix A lists various rate-integrating gyro design features for which this format is applicable. The table is not intended to make any suggestion regarding the selection of particular design features that might restrict the free choice of manufacturers.

The IEEE will maintain this document current with the state of the technology. Comments are invited on this document as are suggestions for additional material. These should be addressed to:

Secretary

IEEE Standards Board

The Institute of Electrical and

Electronics Engineers, Inc

345 East 47 Street

New York, N.Y. 10017

This publication represents a group effort on a large scale. A total of 167 individuals attended 37 meetings of the Gyro and Accelerometer Panel while work on this standard was in progress. The following members were responsible for this work:

R. B. Clark (Chairman, 1967)

C. O. Swanson (Chairman, 1968)

H. A. Dinter (Chairman, 1969)

N. F. Sinnott (Chairman, 1970)

M. D. Mobley (Chairman, 1971)

K. W. Homb (Chairman, 1972)

A. T. Campbell (Chairman, 1973)

A. M. Brady

R. M. Burrows

R. A. Crawford

H. B. Diamond

J. DiGirolamo

E. G. Fotou

H. A. Fredine

T. A. Fuhrman

K. N. Green

H. L. Gubbins

J. E. Hardie

J. G. Hawkins

C. E. Hurlburt

J. V. Johnston

C. A. Jones

J. H. Jordan

K. J. Klarman

J. Koestler

W. G. Lane

A. A. Lee

A. M. Leeking

F. B. Mikoleit

G. E. Morrison

G. H. Neugebauer

T. M. Rankin

R. F. Rathcke

H. F. Rickman

H. Rogall

L. M. Ross

R. C. Royce

C. W. Spencer

C. I. Thornburg

R. L. Van Alstine

B. J. Wimber

H. M. Ziegler

In addition to the above working group, the following members of the Gyro and Accelerometer Panel also approved this standard by letter ballot.

G. J. Bukow

J. Crittenden

P. Flanner

E. Giovanetti

J. Meehan

C. Morley

S. V. Piccirillo

B. Sage

Scope

This specification defines the requirements for a single-degree-of-freedom rate-integrating gyro to be used as a sensor in [an attitude control system, a gimbal platform, an angular displacement measuring system, an angular rate measuring system, _________________________.] The external electronics or control system are not considered to be part of the gyro.