High Propulsion Thrust vs Precision Control
Separate high-thrust and fine-control propulsion functions to achieve both rapid manoeuvres and precision trajectory management.
CyberTRIZ analysis · Space contradiction SDP025 · one of 8,235 worked contradictions published by CyberTRIZ.AI
Business Context
High-thrust propulsion can reduce maneuver duration and support rapid orbital changes, but strong thrust can make fine trajectory control more difficult, introduce structural disturbances, and exceed the precision required for formation flying, rendezvous, or sensitive operations. Low-thrust systems provide finer control but may require substantially longer maneuver periods.
Space TRIZ Resolution
Propulsion functions should be separated according to maneuver scale. High-thrust systems can provide large trajectory changes, while fine-control actuators or low-thrust propulsion perform precision corrections. Variable-thrust systems can also adjust performance dynamically according to maneuver requirements.
Applicable TRIZ Principles
Principle 1 – Segmentation separates large orbital maneuvers from precision control functions.
Principle 15 – Dynamics varies propulsion characteristics according to required maneuver precision.
Principle 35 – Parameter Changes changes thrust level or operating mode according to mission phase.
Expected Outcome
Faster major maneuvers
Higher trajectory precision
Reduced unnecessary propulsion operation
Greater maneuver flexibility
Decision Indicators
Early indicators include:
Large thrusters cannot execute required fine corrections efficiently.
Precision maneuvers require excessive pulsing or complex control.
Low-thrust propulsion makes major maneuvers operationally slow.
One propulsion architecture is expected to satisfy widely different maneuver scales.
Propulsion selection is dominated by a single mission phase.