Hierarchical Sensor Placement With Revival Strategy for Truss Structures

초록

This paper proposes a novel hierarchical (HIE) sensor placement framework designed specifically for the structural health monitoring (SHM) of truss structures. The method strategically integrates zone-based modal sensitivity analysis, global optimization using D-optimality, and a modal assurance criterion (MAC)-based revival mechanism to overcome limitations of conventional sensor placement techniques-including spatial clustering, computational inefficiency, and disregard for initially excluded yet informative nodes. This four-stage methodology ensures spatial balance, enhanced modal observability, and robustness. A numerical study on a 19-node Howe truss shows that the proposed approach yields sensor configurations equal to or superior to those obtained by existing algorithms such as Fisher information matrix (FIM), effective independence (EI), and QR decomposition. The results highlight the practicality and computational efficiency of the proposed HIE scheme for sensor deployment in large-scale modular structures.

키워드