ISO 21442:2022

Overview

ISO 21442:2022 - Space systems - General requirements for control engineering - provides life‑cycle requirements and general principles for developing control systems within space projects. Applicable to the space segment, ground segment, and launch service segment, the standard addresses control engineering across all project phases: management, requirements definition, analysis, design, production, verification & validation, operation, maintenance and disposal. It is intended to be tailored to specific programs and complements (but does not duplicate) discipline‑specific standards and handbooks.

Key technical topics and requirements

ISO 21442:2022 structures control engineering as a systems‑engineering discipline and sets out requirements for:

• Control engineering management: organization, planning, interfaces with other disciplines, resource and capability assessment, risk management, configuration/change control, quality assurance, and dependability.
• Requirements definition: generation, allocation and progressive refinement of control requirements to control components and subsystems.
• Analysis: use of models, methods and tools for requirements analysis and control system performance analysis.
• Design: architecture, functional and interface design, control algorithm and software design, configuration and operational design for controllers, sensors and actuators.
• Production: implementation and procurement support for control components.
• Verification & validation (V&V): verification strategies, preliminary and final functional and performance verification, and in‑flight validation.
• Operations, maintenance and disposal: operational processes, equipment and software maintenance, and end‑of‑life considerations.
• Tailoring: Annex A provides guidance for adapting requirements to specific programs, including systems with multiple control systems.

Practical applications

ISO 21442 is directly applicable to:

• Guidance, Navigation & Control (GNC) and attitude/orbit control systems for satellites and launch vehicles
• Ground control and mission operations systems
• Integration of multiple control systems across spacecraft subsystems
• Development and procurement of control hardware, firmware and software
• Planning verification campaigns, including hardware‑in‑the‑loop and in‑flight validation

Using the standard helps teams ensure consistent, traceable control‑system development that meets mission objectives, safety and dependability requirements.

Who should use this standard

• Control engineers and GNC specialists
• Systems engineers and systems integrators
• Project/program managers and technical leads
• Verification & validation teams and test engineers
• Procurement, operations and maintenance organizations
• Quality assurance and safety engineers in space projects

Related standards and references

• ISO 14300‑1 (Space systems - Programme management - Structuring of a project) is normative in ISO 21442.
• ISO 21442 is intended to be used alongside discipline‑specific standards and handbooks for software, electrical, mechanical and systems engineering.

Keywords: ISO 21442:2022, space systems, control engineering, control systems, GNC, control architecture, verification and validation, life cycle, tailoring, space project standards.