Robust Design Optimization of an Aerospace Vehicle Prolusion System

Table 6

Robustness assessment by variance.

Method	𝐹𝑅ave		𝑃𝑏_max (MPa)		𝐼𝑡 (kN-sec)		𝑚𝑝 (kg)
Percentile difference	optimal	robust	optimal	robust	optimal	robust	optimal	robust
𝑦^0.05	5.93	5.78	15.35	14.41	947.17	938.22	405.17	404.35
𝑦^0.95	6.51	5.90	16.48	14.81	978.34	948.69	433.32	407.33
Δ𝑦^0.050.95	0.58	0.12	1.13	0.40	31.17	10.47	28.15	2.98
First-order Taylor series
σ	0.16	0.05	0.41	0.11	12.75	3.55	13.41	1.45
μ (targeted)	5.5		14.50		930		400
μ (achieved)	6.11	5.80	15.94	14.55	965.55	936.75	420.10	404.10