Dynamic Response Update of Nonlinear Structures Using Transformer-based Displacement Time-Series Estimation and Sensor-based Correction Operators

Jaehyun Park; Chun Il Kim; Jaehun Lee

doi:10.7734/COSEIK.2026.39.2.115

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2026 Vol.39, Issue 2 Preview Page Next Page

Research Paper

Dynamic Response Update of Nonlinear Structures Using Transformer-based Displacement Time-Series Estimation and Sensor-based Correction Operators 트랜스포머 기반 변위 시계열 추정과 센서 기반 보정 연산자를 이용한 비선형 구조물 동적 응답 업데이트

30 April 2026. pp. 115-122

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Abstract

This study proposes a procedure for correcting the dynamic response of nonlinear structures using sensor data obtained at specified locations. Simulation-based time-series prediction can reduce the online computational cost; however, the predicted response inevitably includes model-discrepancy errors due to variations in the actual structure’s material properties and boundary conditions. Hence, we introduce a simulation-response updating procedure that leverages the residual between the measured and predicted displacement responses acquired during operation. A transformer-based time-series model is used to approximate the displacement response, and the residual information in the prediction interval is exploited to correct the nonlinear displacement response. The proposed approach is validated through numerical examples of a cantilever beam and box-shaped beam.

Keywords

sensor data-based response update

reduced-order model

model mismatch

transformer network

본 논문에서는 구조물의 일부 위치에서 획득한 센서 데이터를 기반으로 비선형 구조물의 동적 응답을 보정하는 절차를 제안한다. 시뮬레이션 기반 시계열 예측은 온라인 계산 비용을 절감할 수 있으나, 실제 구조물의 물성 및 경계 조건 변동 등으로 인해 예측 응답에는 모델 불일치 오차가 포함된다. 본 연구에서는 이를 해결하기 위해 운용 단계에서 계측되는 센서 변위 응답과 예측 응답의 잔차를 이용하여 시뮬레이션 응답을 보정하는 절차를 제안한다. 트랜스포머 기반 시계열 모델을 활용하여 변위 응답을 근사하고, 예측 구간의 잔차 정보를 활용하여 비선형 변위 응답을 보정한다. 제안하는 기법은 캔틸레버 보와 박스형 보 수치 예제를 통해 성능을 검증하였다.

키워드

센서 기반 응답 업데이트

차수축소모델

모델 불일치

트랜스포머 네트워크

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Information

Publisher :Computational Structural Engineering Institute of Korea
Publisher(Ko) :한국전산구조공학회
Journal Title :Journal of the Computational Structural Engineering Institute of Korea
Journal Title(Ko) :한국전산구조공학회 논문집
Volume : 39
No :2
Pages :115-122
Received Date : 2026-03-04
Revised Date : 2026-03-10
Accepted Date : 2026-03-10
DOI :https://doi.org/10.7734/COSEIK.2026.39.2.115

Journal of the Computational Structural Engineering Institute of Korea ISSN:1229-3059(Print) 2287-2302(Online) 한국전산구조공학회 논문집

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