Thermal and Structural Analysis of Autonomously In-Space and Lunar Assembled Truss Modules

In light of the recent advancements in space technology and the burgeoning space economy, the demand for large space structures has reached unprecedented levels. These structures are essential for various space activities that require substantial payloads, power, and propulsion systems, including prolonged space exploration and lunar surface facility construction. To achieve this, the development of modular truss structures capable of autonomous assembly is imperative. Truss structures, exemplified by the integrated truss structure (ITS) on the ISS, provide attachment points for solar arrays and external payloads, accommodating electrical and cooling utility lines. The ITS has significantly extended the ISS’s operational lifespan through repairs and upgrades. This study delves into the creation of truss modules designed for autonomous assembly in deep space and lunar environments. Utilizing robotic arms akin to the mobile base system (MBS) on the ISS, these modules incorporate probe and cone docking adapters for secure attachment. Shape memory alloy (SMA) springs enable the adapters to lock and unlock, allowing expansion in all directions. Comprehensive thermal and structural simulations using software like ANSYS assess different truss configurations, materials, and environments. The optimal designs emerging from these simulations will be validated through the construction of prototypes, which will undergo rigorous testing in simulated laboratory conditions. The evaluation will focus on the truss modules’ assembly process, material durability, and the efficacy of docking adapters in resisting separation. Analyses of control groups and docked groups of trusses have been performed for various load conditions, which point to a need for further testing to validate the designs.