Recent advancements in science and technology have enabled even microsatellites to perform various high-level tasks. As the range of missions that satellites undertake expands, even microsatellites now require thrust systems for orbit adjustment and collision avoidance. In such satellite applications, sizes and weights of all electrical components and propulsion systems are restricted, emphasizing the importance of miniaturization and weight reduction. Research is ongoing in various methods to address these needs. To solve these challenges, this study proposed a design model for miniaturizing and lightening both Anode Power Module (APM) and gas supply system. The APM utilizing an LLC resonant converter achieved an efficiency of up to 86%. An evaluation of flow control characteristics of the proposed gas supply device showed that the flow control error was less than 2.3%, indicating effective results. A thermal mass flow sensor was developed to measure the flow of gas. Temperature characteristics derived from experiments were analyzed to assess their applicability to electric thruster systems for satellites.
Owing to recent advances in additive manufacturing technology, design for additive manufacturing (DfAM) has been used to overcome design limitations due to constraints in traditional manufacturing processes. In this study, we applied DfAM technology to design lightweight and consolidated vacuum grippers for inspection equipment. We proposed a consolidated design to reduce manufacturing time and costs, which previously encompassed assembling eleven components. Topology optimization was used to reduce part weight while maintaining structural rigidity and safety, and two optimization models were designed: two-piece and one-piece models. Based on these optimized geometries, the internal vacuum paths were designed in a curved shape to enhance adsorption characteristics. Numerical simulations were conducted to evaluate the structural performance and flow characteristics of the initial design and the two optimization models. The pressure drop of the one-piece model, which was the best design, was reduced to 1/8 of the initial design and the structural safety factor was predicted to be 6.37. This final design was then additively manufactured by a digital light processing type 3D printer and the weight of the resulting parts was reduced from 12.94 to 2.08 g. Experimental observation found that the additively manufactured vacuum gripper showed enhanced absorption performance compared to the initial design.
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A Study on Improvement of Flow Characteristics of TPMS Heat Exchanger based on Mathematical Filtering Seo-Hyeon Oh, Jeong Eun Kim, Ji Seong Yun, Do Ryun Kim, Jungwoo Kim, Chang Yong Park, Keun Park Journal of the Korean Society for Precision Engineering.2024; 41(7): 541. CrossRef
A Study on Injection Mold Design Using Topology Optimization Mi-Jin Kim, Jae-Hyuk Choi, Gyeng-Yun Baek Journal of the Korean Society of Manufacturing Process Engineers.2022; 21(4): 100. CrossRef
A guided missile is a weapon system used in the interception of a ballistic missile using kinetic energy of a kill vehicle. The DACS (Divert and Attitude Control System) is a quick reaction propulsion system and subsystem of a kill vehicle that provides control over positions of a kill vehicle. The DACS allows for the interception of its target with greater accuracy and reliability. A Kill vehicle needs to move at high speed in a bid to intercept a ballistic missile after detecting a target. Thus, the weight reduction design of DACs system is required. The DACS operates under high temperature and pressure environment. In this study, one-way FSI (Fluid and Structure Interaction) analysis were conducted for various types of weight reduction valve model to validate its robustness. Through this process, we suggest an optimized weight reduction valve model
In this paper, the topology optimization method was used to describe the lightweight design of link structures for an amphibious boat. Topology optimization was used to determine the optimum density distribution of the structure. The analysis revealed that the link structures for amphibious boat can be reduced up to 31 percent by weight without altering the design of the connected and supported parts. The structural integrity of the proposed lightweight link structures was evaluated via topology optimization and verified by finite element analysis and static test. The structural integrity of lightweight link structures was found to meet the design requirements. The running stability of amphibious boat with lightweight link structures was verified via ground and water driving tests.
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Optimal Design and Experimental Validation of the Rib Structure of a Manufacturing Machine Bed Using Topology Optimization Ji-Sang Hwang, Sung-Jae Kim, Jeong-Hyun Yoon, Chul-Hoon Sung Journal of the Korean Society of Manufacturing Technology Engineers.2023; 32(6): 374. CrossRef
Study on the Optimal Design of Column Rib Structure of Horizontal Machine Tool Using Topology Optimization Technique Ji-Sang Hwang, Sung-Jae Kim, Chul-Hoon Sung Journal of the Korean Society of Manufacturing Technology Engineers.2023; 32(1): 1. CrossRef
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Designing the internal reinforcements of a sailing boat using a topology optimization approach Antonio Mancuso, Antonio Saporito, Davide Tumino Applied Ocean Research.2022; 129: 103384. CrossRef
A Study on Injection Mold Design Using Topology Optimization Mi-Jin Kim, Jae-Hyuk Choi, Gyeng-Yun Baek Journal of the Korean Society of Manufacturing Process Engineers.2022; 21(4): 100. CrossRef
Lightweight Design of a Vacuum Gripper for Inspection Equipment Using Topology Optimization Euddeum Cha, Tae-Young Kim, Taeho Ha, Keun Park Journal of the Korean Society for Precision Engineering.2021; 38(9): 683. CrossRef
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This study reviews the assumption that the lightweight design of commercial vehicles is significant from the aspect of the anticipated fuel consumption and environmental regulations that are consequently applicable to those vehicles. Generally speaking, it is noted that among the numerous trailer components, a stub axle, which is designed to independently operate as an integral part of trailer’s suspension, can play an important role in increasing the shipping capacity of a box trailer. For this reason, because each stub axle is comparatively a heavy unit in itself, and a total of six stub axles are mounted in a box trailer, the lightweight design of a stub-axle is noted as an essential factor to reduce the whole weight of a trailer. For a finite element analysis, an original CAD model is modified through removing a chamber, airbag, axle drum, bearing and pivot on a vehicle. In addition, the loading conditions are imposed considering three extreme driving conditions and the effects are studied when in the event of review of a fully loaded in a box trailer. A topology optimization is conducted to determine a lightweight design for minimizing compliance under these boundary conditions.
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Toward structure optimization for the mobile vehicle system based on multiconstraints Xin Zhao, Jie Li, Shunli Sun, Chongyang Han, Wenbo Zhu, Zhaokai He, Luxin Tang, Weibin Wu, Jiehao Li Robotic Intelligence and Automation.2023; 43(1): 75. CrossRef
2-D Topology Optimization of the Connection Part of the Electric Kickboard in Case of Front Collision Min Gyu Kim, Ji Sun Kim, Jung Jin Kim Journal of the Korean Society for Precision Engineering.2022; 39(11): 841. CrossRef
Optimal Design for Strength Improvement of Support Bracket for Sanding Device of Railway Vehicle Using Topology Optimization Yonho Cho, Woohyuck Yoon Journal of the Korean Society for Precision Engineering.2020; 37(4): 263. CrossRef
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