ASTM F 3269 : 2021
Current
The latest, up-to-date edition.
Standard Practice for Methods to Safely Bound Behavior of Aircraft Systems Containing Complex Functions Using Run-Time Assurance
Hardcopy , PDF
English
19-11-2021
Important note : Users cannot be edited or removed once added to your Multi user PDF.| Committee |
F 38
|
| DocumentType |
Standard Practice
|
| Pages |
21
|
| PublisherName |
American Society for Testing and Materials
|
| Status |
Current
|
| Supersedes |
1.1The scope of this practice includes the following:
1.1.1A set of components that comprise an RTA system.
1.1.2Requirements and best practices to determine safe boundaries and RTA system coverage.
1.1.3Requirements and best practices for an RTA system and RTA components, as applicable.
1.1.4Appendixes with examples that demonstrate key RTA system concepts.
1.2RTA components are required to meet the design assurance level dictated by a safety assessment process. Guidance for the safety assessment process may be found in references appropriate for the intended operations (ARP4754A, ARP4761, Practice F3178, etc.).
1.3This practice was developed with UAS in mind. It may be applicable for aspects of manned aircraft certification/approval, as well as aviation ground systems. The scope of this practice is also envisioned to allow a variety of aircraft implementations where a human may perform the role of either the Complex Function or a Recovery Function.
1.4The scope of this practice does not cover aspects of hardware/software integration. These should be considered separately during the development process.
Note 1:This practice does not suggest a one-size-fits-all strategy knowing that not all use cases may fit well into this architecture. There may exist additional components required to satisfy specific applications to the practice.
1.5The values stated in inch-pound units are to be regarded as standard. No other units of measurement are included in this standard.
1.6Table of Contents:
| Title | Section | |||
| Introduction | ||||
| Background | ||||
| Scope | 1 | |||
| Referenced Documents | 2 | |||
| ASTM Standards | 2.1 | |||
| FAA Advisory Circular | 2.2 | |||
| RTCA Standards | 2.3 | |||
| SAE Standards | 2.4 | |||
| Terminology | 3 | |||
| Unique and Common Terminology | 3.3 | |||
| Definitions of Terms Specific to This Standard | 3.4 | |||
| Abbreviations | 3.5 | |||
| Significance and Use | 4 | |||
| RTA Functional Architecture | 5 | |||
| Overall Architecture | 5.4 | |||
| Components and Interfaces | 5.4.1 | |||
| RTA System Coverage | 5.4.2 | |||
| RTA Scenarios | 5.4.3 | |||
| Event Sequencing and Timing | 5.4.3.8 | |||
| Best Practices | 5.4.4 | |||
| Requirements | 5.4.5 | |||
| RTA Interfaces | 5.5 | |||
| Input Manager | 5.6 | |||
| Description | 5.6.1 | |||
| Requirements | 5.6.2 | |||
| Safety Monitor | 5.7 | |||
| Requirements | 5.7.2 | |||
| RTA Switch | 5.8 | |||
| Description | 5.8.1 | |||
| Requirements | 5.8.2 | |||
| Recovery Function | 5.9 | |||
| Description | 5.9.1 | |||
| Best Practices | 5.9.2 | |||
| Requirements | 5.9.3 | |||
| Keywords | 6 | |||
| Ground Collision Avoidance System (GCAS) as an Example | Appendix X1 | |||
| Introduction | ||||
| Unassured Function | X1.1 | |||
| RTA Required Inputs | X1.2 | |||
| RTA Input Manager | X1.3 | |||
| Safety Monitor | X1.4 | |||
| Recovery Function | X1.5 | |||
| RTA Switch | X1.6 | |||
| Vehicle Management System | X1.7 | |||
| Machine Learning AI Autopilot (MLAA) | Appendix X2 | |||
| Introduction | ||||
| Assured and Unassured Data | X2.1 | |||
| Input Manager | X2.2 | |||
| Complex Function | X2.3 | |||
| Safety Monitors | X2.4 | |||
| Recovery Control Function | X2.5 | |||
| RTA Switch | X2.6 | |||
| Summary | X2.7 | |||
| Run-Time Assurance for a Neural Network-Based Adaptive | Appendix X3 | |||
| Visual Line-of-Sight Operations | X3.1 | |||
| Beyond Visual Line-of-Sight Operation | X3.2 | |||
| Run-Time Assurance for Risk-Based Operation | Appendix X4 | |||
| Example Implementation of Timing and Latency Requirement | Appendix X5 | |||
| References | | |||
1.7This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.8This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
| ASTM F 3196 : 2018 | Standard Practice for Seeking Approval for Beyond Visual Line of Sight (BVLOS) Small Unmanned Aircraft System (sUAS) Operations |
| ASTM F 3341/F3341M : 2020 : REV A | Standard Terminology for Unmanned Aircraft Systems |
| ASTM F 3341/F3341M : 2020 : REV A | Standard Terminology for Unmanned Aircraft Systems |
| ASTM F 3341/F3341M : 2024 | Standard Terminology for Unmanned Aircraft Systems |
| ASTM F 3341/F3341M : 2022 | Standard Terminology for Unmanned Aircraft Systems |
| ASTM F 3341/F3341M : 2023 | Standard Terminology for Unmanned Aircraft Systems |
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