Modular Design vs Structural Efficiency
Apply modularity only at genuine lifecycle change boundaries, using multi-function interfaces to recover structural efficiency while maintaining conformity assessment traceability.
CyberTRIZ analysis · Space contradiction TSI009 · one of 8,235 worked contradictions published by CyberTRIZ.AI
Regulations
Business Context
Modular spacecraft architectures simplify manufacturing, integration, replacement, upgrades, and reuse. However, module boundaries require connectors, mounting hardware, structural interfaces, packaging allowances, and additional reinforcement. Highly integrated structures can achieve better mass and stiffness performance but are more difficult to modify.
Space TRIZ Resolution
Modularity should correspond to actual lifecycle change boundaries. Frequently replaced, upgraded, or mission-specific elements can remain modular, while stable structural functions can be integrated. Structural interfaces can also perform electrical, thermal, or mechanical functions simultaneously to reduce the resource penalty associated with modularity.
Applicable TRIZ Principles
Principle 1 – Segmentation creates modules according to meaningful functional and lifecycle boundaries.
Principle 3 – Local Quality applies modularity where adaptability provides measurable value.
Principle 6 – Universality allows modular interfaces to perform multiple supporting functions.
Expected Outcome
Greater spacecraft modularity
Maintained structural efficiency
Reduced interface mass
Easier integration and upgrades
Decision Indicators
Early indicators include:
Modular interfaces contribute substantial spacecraft mass.
Stable components are modular despite little replacement value.
Structural reinforcement increases significantly around module boundaries.
Integrated designs prevent economically valuable upgrades.
Modularity is applied uniformly rather than according to lifecycle needs.