BS ISO 22772:2020 pdf download

BS ISO 22772:2020 pdf download.Space systems — Requirements of launch vehicle (LV) to electrical ground support equipment (EGSE) interfaces
1 Scope
This document provides requirements for launch system designers or interface designers regarding interfaces between LV and EGSE, which is used to support on-line processing. It defines electrical interface types, design requirements, environment requirements, verification methods (analyses and tests), and interface check operation requirements. This document is intended to minimize design costs and reduce risks from errors resulting from miscommunication. It does not limit LV or EGSE organizational requirements to specify a unique interface.
2 Normative references
There are no normative references in this document.
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obp
— IEC Electropedia: available at http://www.electropedia.org/
3.1 electrical ground support equipment
EGSE
non-flight electrical equipment or system used to support on-line processing and associated launching services
3.2 interface control document
ICD
formal means of describing the inputs and outputs of a system, the interfaces among systems, or the protocols among physical or electronic elements of an entity
[SOURCE: ISO/TR 16158:2013, 3.6]
5.3 Design principles
The design principles are as follows.
a) The interface signal definition shall be clear and unambiguous.
b) A ready-made standard interface must be adopted to decrease the number of interface types.
c) The necessary provisions should be put in place for development and implementations of measures aimed at preventing mixes in connection between equipment communications and the same type component items.
d) Electrical performance shall be matched between sources and loads.
e) Isolation measures shall be taken to prevent mutual influences among the equipment or systems under a failure state.
f) Electromagnetic compatibility shall be considered, including but not limited to, filtering, shielding,and grounding.
g) Redundancy design shall be considered.
h) Simulation analyses and test verifications shall be performed as part of the interface design process.
i) Margins as specified by manufacturers or general safety considerations shall be preserved.
j) Extensibility shall be considered.
k) Frequency, power and other characteristics shall be considered to determine the configuration of the signal and power grounding, such as floating, single-point or multiple-point grounding,common or independent grounding, etc.
l) Grounding continuity and resistance shall be considered to meet the application requirements.