유전알고리즘을 이용한 고속 스핀들 시스템의 동적 설계 최적화
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This study introduces an optimum design of the high speed spindle system for minimum critical speed, compliance, and weight construction using a genetic algorithm. The disk, shaft, and bearing components of a spindle system are modelled as appropriate finite elements respectively. In the design optimization, the shaft length, the shaft outer diameter, the shaft inner diameter, bearing positions (or bearing span) and bearing stiffness were set as design variables. The unique objective function is obtained by multiplying an appropriate weighting factor by multi-objective functions, such as critical speed, compliance, and the total weight. The constraints are limitations of maximum critical speed and weight, and the vibration limit of the spindle system. Optimization results show that critical speed, weight, and the compliance are reduced by 18.6% , 2.2% and 36% respectively compared with the initial spindle system.