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유전 알고리즘을 이용한 AA6061 알루미늄 판재의 레이저-아크 하이브리드 용접 공정 변수 최적화
장일광(Ilkwang Jang),박영우(Young Woo Park),김항래(Hang Rae Kim),이강용(Kang Yong Lee) 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.5
Genetic algorithm has been carried out to develop a new approach for optimization of Nd:YAG laser and MIG hybrid welding parameters. The characteristic of weld ability is dependent on various process parameters. the parameters chosen for current study include laser power, laser focus, traveling speed, wire feed rate, root opening gap, and arc voltage. The Butt welding design were chosen for aluminum alloy 6061-T6 plate and the ultimate tensile strength were measured for evaluating multiple parameters. Base on the results of genetic algorithm, the optimal process parameters were obtained. It is observed that the results obtained by using the optimal parameters are much improved compared to those from the preliminary set of experimental parameters.
장일광(Ilkwang Jang),이용우(Yongwoo Lee),조재명(Jae Myung Cho),홍성부(Sungboo Hong),장용훈(Yong Hoon Jang) 한국소음진동공학회 2024 한국소음진동공학회 논문집 Vol.34 No.2
The rapidly expanding use of electro-optical tracking systems (EOTSs) in various industries has led to an emphasis on improving their precision and stability. This study investigated an approach to optimize the installation angle of the spring-damper anti-vibration system of an EOTS, particularly in military applications. The spring-damper system was numerically simulated using a finite element analysis model, considering the constraints of a confined installation space. The potential of this system to counteract low-frequency vibrations, which is a limitation of traditional rubber-based systems, was explored. The optimal installation angle was determined by ensuring a uniform distribution of natural frequencies on all three axes (x, y, z) of vibration. The results indicated an optimal installation angle of 56.95°, which provided a balanced damping performance across all axes. The study concluded that this angle resulted in the most effective performance of the EOTS spring-damper anti-vibration system. These findings will contribute to the enhancement of EOTS stability and precision, thus potentially improving military operations.