EuroSMG

- European Stepper Motor Gearbox qualification

STATUS | Completed
STATUS DATE | 09/10/2020
ACTIVITY CODE | 4C.045
EuroSMG

Objectives

The primary project objective of this contract is to qualify the design for space use, using one Qualification Model (QM), against a user specification and applicable ECSS requirements.

This builds upon previous developments by Reliance where an Engineering Model (EM), representative of the QM, was subjected to a full test campaign and strip-down to give confidence regarding the qualification test campaign.

The output from this contract is a Qualification Model (QM).

Challenges

The SMG assembly is required to work as part of an existing SADM product. It therefore has to maintain the same electrical interfaces from the control system and also the same mechanical interfaces between SMG assembly and SADM, as is currently in place.

The SMG assembly performance data, when fitted to a SADM, should be within the historic SADM family test data (or better).

The key challenge is achieving the above (including mass, size and cost) while meeting ECSS requirements.

Secondly, Reliance is to ensure that the EuroSMG product is ITAR free as well as the overall supply chain.

Finally, Reliance’s design approach is for a completely new SMG without use of 3rd party, space approved sub-assemblies (e.g. motor), so a full concept to qualification programme. 

System Architecture

The system architecture can be broken into the two motors and a gearbox.

Plan

The qualification programme includes the following project activities:

Critical Design Review – review of conclusions from all EM testing (inclusive of a full test campaign representative of the Qualification campaign, strip-down and inspection) and test data (correlated with the analytical substantiation).

Combined MRR/MPCB0 – a QM baseline MPCB immediately prior to build activities commencing.

Build – build of a number of units.

QTRR – following all build activities (inclusive of lead coating and painting).

Testing – according to that agreed at QTRR.

Final Review – to close the activity.

Current Status

Development successfully completed. Product ready for commercial supply, subject to specific customer application requirements.

Documents