ISO 21384-2:2021

INTERNATIONAL ISO
STANDARD 21384-2
First edition
2021-12
Unmanned aircraft systems —
Part 2:
UAS components
Aéronefs sans pilote —
Partie 2: Composants des UAS
Reference number
© ISO 2021
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Published in Switzerland
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Contents Page
Foreword .vii
Introduction .viii
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Abbreviated terms . 2
5 General design requirements for UAS. 4
5.1 General . 4
5.2 Function and reliability . 4
5.2.1 Design . 4
5.2.2 Components . 5
5.3 Maintainability and supportability . 5
5.3.1 Design . 5
5.3.2 Documentation. 5
5.3.3 Support . 6
5.4 Fatigue durability . 6
5.5 Aircraft identification features . 6
5.6 Transportation, storage and packaging . 6
6 Aircraft structures . 7
6.1 Overview . 7
6.2 Damage tolerance assessment . 7
6.3 UA construction . 7
6.4 Moving parts . 8
6.5 Attached parts . 8
7 Propulsion . 8
7.1 Propulsion risk management . 8
7.2 Engines and motors . . 8
7.2.1 General requirements . 8
7.2.2 Mounting and installation . 8
7.2.3 Combustion engines . 9
7.2.4 Electric motors . 9
7.2.5 Electronic speed controller (ESC) requirements . 9
7.3 Thrust mechanisms . 9
7.3.1 Propellers and rotors . 9
7.3.2 Turbine and fans . 10
8 Electrical systems .10
8.1 General . 10
8.2 Electrical safety . 10
8.3 Airborne electrical systems . 10
8.4 Ground electrical systems . 10
8.4.1 UAS electrical components on the ground . 10
8.4.2 RPS power system . 11
8.4.3 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 . 11
9.2 Combustible fuels . 11
9.3 Fuel cells .12
9.3.1 General requirements .12
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9.3.2 General safety requirements .12
9.3.3 Protective measures .12
10 Equipment .12
10.1 Avionic equipment (general). 12
10.2 Flight control system (FCS) . 13
10.2.1 General requirement . .13
10.2.2 Flight control hardware .13
10.2.3 Flight control software . 14
10.2.4 Course accuracy . 14
10.2.5 Airspeed . 14
10.3 Flight control actuators .15
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) . 16
10.5.5 Magnetic compass . 16
10.6 Attitude sensors . 16
10.6.1 Altimeter . 16
10.6.2 Airspeed sensor.
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