The control fin is a key component in a guided missile's propulsion system, stabilizing the missile's attitude and maintaining its flight trajectory under high-speed conditions. Such components demand high mechanical strength and thermal stability. However, traditional control fin designs have primarily focused on external geometry, overlooking opportunities to enhance performance through internal structural design.To address this limitation, this study proposes a design approach that integrates lattice structures within the control fin using metal additive manufacturing. A body-centered cubic (BCC) lattice was selected, with strut diameter and unit cell aspect ratio defined as the primary design variables. Finite element analysis in Abaqus was used to evaluate structural behavior, analyzing stress and displacement distributions based on variations in these lattice parameters. Manufacturability and lightweight characteristics were also assessed. Results indicate that increasing the strut diameter improves structural stability, with stress predominantly concentrated near lattice joints. Building on these findings, a non-uniform lattice design, derived from the uniform lattice analysis, was applied, demonstrating improved stress distribution and overall structural performance. This approach shows that lattice-based internal structures, enabled by metal additive manufacturing, can significantly enhance the structural performance of guided missile control fins while achieving substantial weight reduction.
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
First
Prev
