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전자기형 액추에이터 기반 레이저 고속조준기의 구조신뢰성 연구
유준선(Junsun Yoo),임선빈(Seonbin Lim),노현규(Hyungyu Roh),정재우(Jae Woo Jung),이승한(Seoung-Han Lee),박노철(No-Cheol Park) 대한기계학회 2021 대한기계학회 춘추학술대회 Vol.2021 No.11
Laser weapons are being developed competitively in the defense industry because they are relatively easy to use and can exert powerful energy with high cost-efficiency. FSM(Fast Steering Mirror) is a very significant component for precisely tracking target objects and aligning beam. In this study, a new type of FSM with voice coil actuators was developed. In consideration of the amount of electromagnetic force allowed by voice coil actuators, the reliability of the structural design for implementing the desired performances such as driving range, bandwidth, and angular acceleration was verified. ANSYS Electronics, a software for electromagnetic analysis, and ANSYS Mechanical for structural analysis were used in order to evaluate the reliability of FSM. Moreover, the structural robustness was verified by having a sufficient safety factor through stress analysis.
교전 운용에 따른 충격하중을 고려한 안테나 장치의 구조건전성 및 성능 분석
김대근(Daekeun Kim),임선빈(Seonbin Lim),노현규(Hyun Gyu Roh),이종학(Jong-Hak Lee),신동준(Dong-Jun Shin),이종훈(Jong-Hoon Lee),박경락(Gyeong-Rak Park),강신민(Shin-Min Kang),박노철(No-Cheol Park) 한국소음진동공학회 2023 한국소음진동공학회 논문집 Vol.33 No.6
The antenna device used in the close-in weapon systems is the primary device for detecting targets and effectively countering enemy aircraft, anti-ship guided munitions, and close-in maritime terrorist threats, as well as ensuring survivability in a warfare environment. The antenna device must exhibit structural integrity and meet the radar performance criteria for warfare operations scenarios that consider the shock loads from underwater weapons and machine gun fire, as well as general environmental conditions. To simulate the warfare operating environment for underwater explosion and machine gun shock loads, the German Navy’s BV043 standard and actual machine gun data were used to convert the antenna mount response into a time-history signal. This simulation formed the basis for the development of a finite element analysis model of an antenna device for a ship equipped with machine guns, and modal analysis and transient response analysis were performed. For shock resistance analysis, stress-based evaluation of the structure and acceleration-based evaluation of the components were performed based on the results of the finite element analysis to evaluate the structural integrity and performance of the radar.
충격 하중의 주파수 특성을 고려한 안테나 구조물의 모드 기반 구조 경량화
김휘재(Wheejae Kim),박영진(Youngjin Park),김대근(Daekeun Kim),임선빈(Seonbin Lim),이종학(Jong-Hak Lee),신동준(Dong-Jun Shin),박경락(Gyeong-Rak Park),김희준(Hee-Joon Kim),김태석(Tae-Suk Kim),박노철(No-Cheol Park) 한국소음진동공학회 2023 한국소음진동공학회 논문집 Vol.33 No.6
The antenna structure of the close-in weapon systems, which is integrated into the machine gun, needs to be lightweight to reduce the load on the gun’s driving. Additionally, the antenna structure must ensure structural integrity against shock loads to guarantee survivability in various naval combat environments. Although topology optimization is commonly used for lightweight design, it requires transient response analysis, which is significantly costly. In this study, we propose a modal-based structural optimization method that ensures structural integrity for lightweight design by considering the frequency characteristics of shock loads and the dynamic characteristics of the structure. The optimization problem was defined using constraints to avoid the natural frequencies of the structure from the frequency range of the shock loads, and objective function that reducing mass of the structure. To verify the optimization method, modal and transient response analyses of the lightweight model obtained were performed, and the structural integrity of the antenna structure was evaluated.