Spacecraft Launcher Nozzle
- Model/test mismatch
- High test/model cost
- Lower performance
- High operation cost
The nozzle was made of 2 main pieces joined by a combination of bolts and elastomeric joints. This complex connection was a source of nonlinearity which contributed to test-model differences.
Proper identification of the nonlinear connection and creation of a nonlinear model allowed to properly represent the dynamics of the spacecraft structure.
Efficiency gain. Lower launch cost through safety margin and weight reduction.