ECSS discipline E-33 Mechanisms (October 2023)


The course will cover:

  • Mechanism definition, requirements, and development approach.

  • Mechanism technologies and components

  • Design rules for lubrication and tribology, mechanical design and sizing

  • Mechanism verification.


For this objective, the following standard must be considered: ECSS-E-ST-33-01C Space Engineering: Mechanisms.

The content of the course will include:

  • General introduction about Mechanism definition and interfaces / interactions of mechanisms with other disciplines: thermal control, structures, functional operations, materials and parts, propulsion, electrical and electronics, and servo control interactions.
  • Definition of mechanisms specific terms
  • Mission requirements and design requirements for mechanisms
  • Development approach and models
  • Reliability requirements
  • Mechanism design requirements: Tribology, Thermal control, Mechanical design and sizing, Pyrotechnics, Electrical and electronic, control loop design.
  • Materials and lubrication
  • Functional dimensioning requirement (Force/Torque Margin)
  • Mechanism verification by test & analysis
  • Life test and associated requirements
  • Mechanism development and support documentation



The objective of the course is to present the main requirements in the ECSS E-33 discipline for design, sizing, manufacturing, and verification of mechanisms.



Geert Smet, TEC-MSM, ESA


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Last updated: Tuesday, 11 July 2023 - 10:57 (CEST)