APPLICATION OF METAL MATRIX COMPOSITES (MMCS) IN A SATELLITE BOOM TO REDUCE WEIGHT AND VIBRATIONS AS A MULTIDISCIPLINARY OPTIMIZATION

摘要

Critical space missions, demand lightweightrnspace structures with high pointing accuracyrnand dimensional stability in the presence ofrndynamic and thermal disturbances [1,2].rnTherefore both organic-matrix and metal-matrixrncomposites (MMCs) have been developed forrnspace applications [1,2].rnSimultaneous reduction of weight and bandrnaveraged vibration transmission in a satelliternboom structure is the major task of the presentrnstudy. This study approached the designrnproblem by material selection among a list ofrnMMCs and changing the cross sections of trussrnmembers. Optimization problem was solvedrnusing GA as a constrained one by new penaltyrnfunctions.