EN 16603-60-21:2018

SLOVENSKI STANDARD
01-november-2018
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Space engineering - Gyros terminology and performance specification
Raumfahrttechnik - Kreiselinstrumente - Terminologie und Leistungsspezifikation
Ingénierie spatiale - Spécification des performances et terminologie des gyros
Ta slovenski standard je istoveten z: EN 16603-60-21:2018
ICS:
01.040.49 Letalska in vesoljska tehnika Aircraft and space vehicle
(Slovarji) engineering (Vocabularies)
49.140 Vesoljski sistemi in operacije Space systems and
operations
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 16603-60-21
NORME EUROPÉENNE
EUROPÄISCHE NORM
September 2018
ICS 01.040.49; 49.090; 49.140
English version
Space engineering - Gyros terminology and performance
specification
Ingénierie spatiale - Spécification des performances et Raumfahrttechnik - Kreiselinstrumente - Terminologie
terminologie des gyros und Leistungsspezifikation
This European Standard was approved by CEN on 11 July 2018.

CEN and CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for
giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical
references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to
any CEN and CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN and CENELEC member into its own language and notified to the CEN-CENELEC
Management Centre has the same status as the official versions.

CEN and CENELEC members are the national standards bodies and national electrotechnical committees of Austria, Belgium,
Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany,
Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania,
Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.

CEN-CENELEC Management Centre:
Rue de la Science 23, B-1040 Brussels
© 2018 CEN/CENELEC All rights of exploitation in any form and by any means Ref. No. EN 16603-60-21:2018 E
reserved worldwide for CEN national Members and for
CENELEC Members.
Table of contents
European Foreword . 5
Introduction . 6
1 Scope . 7
2 Normative references . 8
3 Terms, definitions and abbreviated terms . 9
3.1 Terms from other standards . 9
3.2 Terms specific to the present standard . 9
3.3 Abbreviated terms. 15
4 Functional requirements . 16
4.1 Overview . 16
4.2 Operating modes . 16
4.2.1 Operating modes Functional requirements . 16
4.2.2 Operating modes Verification requirement . 17
4.3 Start-up . 17
4.3.1 Start-up Functional requirements . 17
4.3.2 Start-up Verification requirements . 17
4.4 Warm-up . 18
4.4.1 Warm-up Functional requirements . 18
4.4.2 Warm-up Verification requirements . 18
4.5 Time and frequency, datation and synchronisation . 18
4.5.1 Time and frequency Functional requirements . 18
4.5.2 Time and frequency Verification requirements . 19
4.6 Alignment and scale factor . 19
4.6.1 Alignment and scale factor Functional requirements . 19
4.6.2 Alignment and scale factor Verification requirements . 20
4.7 Commandability and observability . 20
4.7.1 Commandability and observability Functional requirements . 20
4.7.2 Commandability and observability Verification requirements . 20
4.8 Failure diagnosis . 20
4.8.1 Failure diagnosis Functional requirements . 20
4.8.2 Failure diagnosis Verification requirements . 21
4.9 Measurement mode . 21
4.9.1 Measurement mode Functional requirements . 21
4.9.2 Measurement mode Verification requirements . 21
4.10 Auxiliary modes . 21
4.10.1 Auxiliary modes Functional requirements . 21
4.10.2 Auxiliary modes Verification requirements . 22
4.11 Anti-aliasing filter . 22
4.11.1 Anti-aliasing Functional requirements. 22
4.11.2 Anti-aliasing Verification requirements . 22
4.12 Stimulation . 22
4.12.1 Stimulation Functional requirements . 22
4.12.2 Stimulation Verification requirement . 22
4.13 Lifetime and duty cycle . 23
4.13.1 Lifetime and duty cycle Functional requirements . 23
4.13.2 Lifetime and duty cycle Verification requirement . 23
5 Performance requirements . 24
5.1 Use of the statistical ensemble . 24
5.1.1 Overview . 24
5.1.2 Provisions . 24
5.2 Performance Verification requirements . 25
5.3 General Performance requirements . 25
5.4 General performance metrics . 26
5.4.1 Overview and definition . 26
5.4.2 Bias . 27
5.4.3 Noise. 32
5.4.4 Scale factor error . 35
5.4.5 Misalignment . 38
5.4.6 Measurement datation and latency . 41
5.4.7 Start-up performances . 42
5.4.8 Warm-up phase performances . 43
5.4.9 Measured output bandwidth . 43
5.4.10 Anti-aliasing filter . 43
5.4.11 Data quantization . 44
5.4.12 Failure detection efficiency . 44
5.4.13 Stimulation . 45
5.5 Functional and performance mathematical model . 45
Annex A (normative) Functional and performance mathematical model
(FMM) description - DRD . 48
Annex B (informative) Example of data sheet . 50
Bibliography . 52

Figures
Figure 3-1: example alignment reference frame . 10
Figure 3-2: mechanical reference frame (MRF) . 14
Figure 4-1: Example of Start-up and Warm-up phases . 18
Figure 5-1: Examples of Bias evaluation from test or simulation data . 27
Figure 5-2: Switch-on bias repeatability computation . 31
Figure 5-3: Bias stability computation . 32
Figure 5-4: Monolateral PSD and Allan Variance. 34
Figure 5-5: Example of Functional Mathematical Model Architecture . 47

European Foreword
This document (EN 16603-60-21:2018) has been prepared by Technical
Committee CEN-CENELEC/TC 5 “Space”, the secretariat of which is held by
DIN.
This standard (EN 16603-60-21:2018) originates from ECSS-E-ST-60-21C.
This European Standard shall be given the status of a national standard, either
by publication of an identical text or by endorsement, at the latest by March
2019, and conflicting national standards shall be withdrawn at the latest by
March 2019.
Attention is drawn to the possibility that some of the elements of this document
may be the subject of patent rights. CEN shall not be held responsible for
identifying any or all such patent rights.
This document has been prepared under a standardization request given to
CEN by the European Commission and the European Free Trade Association.
This document has been developed to cover specifically space systems and has
therefore precedence over any EN covering the same scope but with a wider
domain of applicability (e.g. : aerospace).
According to the CEN-CENELEC Internal Regulations, the national standards
organizations of the following countries are bound to implement this European
Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic,
Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France,
Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia,
Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United
Kingdom.
Introduction
This Standard is intended to support the variety of space borne gyros either
available or under development, with the exception of the gyros used for the
launch vehicles.
This standard defines the terminology and specifications for the functions and
performance of gyros used on spacecraft. It focuses on the specific topics to be
found in the gyros procurement specification documents and is intended to be
used as a structured set of systematic provisions.
This standard is split in three main clauses:
• Terminology (clause 3)
• Functional requirements (clause 4)
• Performance requirements (clause 5)
NOTE This standard does not contain textbook material
on gyro technology. The readers and the users are
assumed to possess general knowledge of gyro
technology and its applications to space missions.
Scope
This Standard specifies gyros functions and performances as part of a space
project. This Standard covers aspects of functional and performance
requirements, including nomencl
...