ISO/DIS 21384-2
(Main)Unmanned aircraft systems
Unmanned aircraft systems
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Standards Content (sample)
DRAFT INTERNATIONAL STANDARD
ISO/DIS 21384-2
ISO/TC 20/SC 16 Secretariat: ANSI
Voting begins on: Voting terminates on:
2021-03-11 2021-06-03
Unmanned aircraft systems —
Part 2:
UAS Components
ICS: 49.020
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENT AND APPROVAL. IT IS
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
This document is circulated as received from the committee secretariat.
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
Reference number
NATIONAL REGULATIONS.
ISO/DIS 21384-2:2021(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
PROVIDE SUPPORTING DOCUMENTATION. ISO 2021
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ISO/DIS 21384-2:2021(E)
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© ISO 2021
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ISO/DIS 21384-2:2021(E)
Contents Page
Foreword ........................................................................................................................................................................................................................................vi
Introduction ..............................................................................................................................................................................................................................vii
1 Scope ................................................................................................................................................................................................................................. 1
2 Normative references ...................................................................................................................................................................................... 1
3 Terms and definitions ..................................................................................................................................................................................... 1
4 List of abbreviated terms ............................................................................................................................................................................. 3
5 General design requirements for unmanned aircraft systems ............................................................................ 5
5.1 General ........................................................................................................................................................................................................... 5
5.2 Function and Reliability .................................................................................................................................................................. 5
5.2.1 Design ........................................................................................................................................................................................ 5
5.2.2 Components ......................................................................................................................................................................... 5
5.3 Maintainability and supportability ....................................................................................................................................... 6
5.3.1 Design ........................................................................................................................................................................................ 6
5.3.2 Documentation .................................................................................................................................................................. 6
5.3.3 Support ..................................................................................................................................................................................... 6
5.4 Fatigue durability .................................................................................................................................................................................. 6
5.5 Transportation, storage and packaging ............................................................................................................................. 7
6 Aircraft Structures .............................................................................................................................................................................................. 7
6.1 General requirements ....................................................................................................................................................................... 7
6.1.1 Fatigue evaluation and damage tolerance ................................................................................................. 7
6.1.2 Conspicuity ........................................................................................................................................................................... 8
6.1.3 UA Construction ...................................................................... .......................................................................................... 8
6.1.4 Moving parts ........................................................................................................................................................................ 8
6.1.5 Attached parts .................................................................................................................................................................... 8
6.2 Aircraft identification ........................................................................................................................................................................ 8
7 Propulsion ................................................................................................................................................................................................................... 8
7.1 Propulsion risk management ..................................................................................................................................................... 9
7.2 Engines and motors ............................................................................................................................................................................ 9
7.2.1 General requirements .................................................................................................................................................. 9
7.2.2 Mounting and Installation ....................................................................................................................................... 9
7.2.3 Combustion engines...................................................................................................................................................... 9
7.2.4 Electric motors ...............................................................................................................................................................10
7.2.5 Electronic speed controller (ESC) ..................................................................................................................10
7.3 Thrust mechanisms .........................................................................................................................................................................10
7.3.1 Propellers and Rotors ...............................................................................................................................................10
7.3.2 Turbine and fans ...........................................................................................................................................................10
8 Electrical systems .............................................................................................................................................................................................11
8.1 General ........................................................................................................................................................................................................11
8.2 Electrical Safety ...................................................................................................................................................................................11
8.3 Ground electrical systems ..........................................................................................................................................................11
8.3.1 RPS power system .......................................................................................................................................................11
8.3.2 Labelling ...............................................................................................................................................................................11
9 Energy sources .....................................................................................................................................................................................................11
9.1 Batteries .....................................................................................................................................................................................................11
9.1.1 General...................................................................................................................................................................................11
9.1.2 Protective measures ........................................................................................................................................... ........11
9.1.3 Precautions ........................................................................................................................................................................12
9.2 Fossil fuels ................................................................................................................................................................................................12
9.3 Fuel cells ....................................................................................................................................................................................................12
9.3.1 General requirements ...............................................................................................................................................12
9.3.2 General safety requirements ..............................................................................................................................12
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ISO/DIS 21384-2:2021(E)
10 Avionics .......................................................................................................................................................................................................................12
10.1 Avionic equipment - general ....................................................................................................................................................12
10.2 Flight control systems ....................................................................................................................................................................13
10.2.1 General requirement .................................................................................................................................................13
10.2.2 Flight Control Hardware .........................................................................................................................................13
10.2.3 Flight Control Software ...........................................................................................................................................13
10.2.4 Course accuracy .............................................................................................................................................................14
10.2.5 Airspeed ...............................................................................................................................................................................14
10.3 Flight control actuator ...................................................................................................................................................................14
10.4 Diagnostics ..............................................................................................................................................................................................15
10.5 .Navigation Systems .........................................................................................................................................................................15
10.5.1 General...................................................................................................................................................................................15
10.5.2 Global Navigation Satellite System (GNSS) Receiver .....................................................................15
10.5.3 Real Time Kinematic (RTK) Augmentation .................. ..........................................................................15
10.5.4 Inertial measurement unit (IMU) ...................................................................................................................15
10.5.5 Magnetic compass........................................................................................................................................................16
10.6 Attitude Sensors ..................................................................................................................................................................................16
10.6.1 Altimeter ..............................................................................................................................................................................16
10.6.2 Airspeed sensor .............................................................................................................................................................16
10.6.3 Optical sensor ..................................................................................................................................................................17
10.7 Redundancy ............................................................................................................................................................................................17
10.7.1 Hardware redundancy .............................................................................................................................................17
10.7.2 Software redundancy ................................................................................................................................................17
10.8 Failure modes ........................................................................................................................................................................................17
11 C2 Link ..........................................................................................................................................................................................................................18
11.1 Antenna module design ................................................................................................................................................................18
11.2 C2 Link ........................................................................................................................................................................................................18
11.2.1 Operations ..........................................................................................................................................................................18
11.2.2 C2 Link Security .............................................................................................................................................................18
11.2.3 C2 Link protocol ............................................................................................................................................................18
11.3 Data Features .........................................................................................................................................................................................19
11.3.1 UA status Data .................................................................................................................................................................19
11.3.2 Delay requirements ....................................................................................................................................................19
11.4 Reliability Requirements .............................................................................................................................................................19
11.5 Security Requirements ..................................................................................................................................................................19
12 Remote Pilot Station ......................................................................................................................................................................................19
12.1 Features ......................................................................................................................................................................................................19
12.1.1 Data monitoring systems .......................................................................................................................................20
12.2 Design requirements ......................................................................................................................................................................20
12.2.1 System ....................................................................................................................................................................................20
12.2.2 Structure ..............................................................................................................................................................................20
12.2.3 Ergonomics design ......................................................................................................................................................20
12.3 Functional requirements .............................................................................................................................................................21
12.3.1 Mission planning ...........................................................................................................................................................21
12.3.2 Data Link control ..........................................................................................................................................................21
12.3.3 Flight Control Commands .....................................................................................................................................21
12.4 Displays ......................................................................................................................................................................................................21
12.4.1 Instrumentation ............................................................................................................................................................21
12.4.2 Readability .........................................................................................................................................................................22
12.4.3 Accuracy ...............................................................................................................................................................................22
12.4.4 Warnings, cautions, and advisories ..............................................................................................................22
12.4.5 Display/interface failures......................................................................................................................................22
12.4.6 Track and parameter display .............................................................................................................................22
12.4.7 C2 Link status display ...............................................................................................................................................22
12.4.8 Telemetry parameter record ..............................................................................................................................22
12.5 Performance requirements .......................................................................................................................................................23
12.5.1 Environmental adaptability ................................................................................................................................23
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12.5.2 Reliability ............................................................................................................................................................................23
12.6 Safety ............................................................................................................................................................................................................23
12.7 Collision avoidance (CA) systems ........................................................................................................................................24
13 Payload.........................................................................................................................................................................................................................24
13.1 General requirements ....................................................................................................................................................................24
13.2 Payload safety marking .................................................................................................................................................................24
13.2.1 Wiring design ...................................................................................................................................................................24
13.2.2 Payload power supply ..............................................................................................................................................24
13.3 Storage requirement .......................................................................................................................................................................25
14 Airworthiness .......................................................................................................................................................................................................25
14.1 Documentation ....................................................................................................................................................................................25
14.1.1 Instructions .......................................................................................................................................................................25
14.1.2 Manuals and handbooks ........................................................................................................................................25
14.1.3 Process changes .............................................................................................................................................................25
14.2 Composition of an operator’s manual ..............................................................................................................................25
14.2.1 Flight performance .....................................................................................................................................................25
14.2.2 Aircraft weights..............................................................................................................................................................26
14.2.3 Flight control accuracy ............................................................................................................................................26
14.2.4 Dimensions ........................................................................................................................................................................26
14.2.5 Atmospheric and other environments adaptability .......................................................................26
14.2.6 Mechanical Environment adaptability .......................................................................................................27
14.2.7 Electromagnetic compatibility considerations ...................................................................................27
14.2.8 Noise ........................................................................................................................................................................................27
14.3 Self-test and monitoring ..............................................................................................................................................................27
14.4 System safety program ..................................................................................................................................................................27
14.4.1 Selection of design materials .............................................................................................................................27
14.4.2 Properties and processes ......................................................................................................................................28
14.4.3 Corrosion .............................................................................................................................................................................28
14.4.4 Material limitations ....................................................................................................................................................29
14.4.5 Design considerations ..............................................................................................................................................29
14.4.6 Equipment separation ........................................................................................................................................... ...29
15 UAS software ..........................................................................................................................................................................................................29
15.1 Software architecture and design ........................................................................................................................................30
15.1.1 Safety .......................................................................................................................................................................................30
15.1.2 Security .................................................................................................................................................................................30
15.2 Software compliance .......................................................................................................................................................................30
15.3 Software development life cycle ...........................................................................................................................................30
16 Other considerations ....................................................................................................................................................................................30
16.1 Ground Support Equipment .....................................................................................................................................................30
16.2 Multi vehicle control .....................................................................................................................................
...
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