TY - JOUR
T1 - Identification of additive continuous-time systems in open and closed loop
AU - González, Rodrigo A.
AU - Classens, K.H.J.
AU - Rojas, Cristian R.
AU - Welsh, James S.
AU - Oomen, Tom A.E.
PY - 2024/9/24
Y1 - 2024/9/24
N2 - When identifying electrical, mechanical, or biological systems, parametric continuous-time identification methods can lead to interpretable and parsimonious models when the model structure aligns with the physical properties of the system. Traditional linear system identification may not consider the most parsimonious model when relying solely on unfactored transfer functions, which typically result from standard direct approaches. This paper presents a novel identification method that delivers additive models for both open and closed-loop setups. The estimators that are derived are shown to be generically consistent, and can admit the identification of marginally stable additive systems. Numerical simulations show the efficacy of the proposed approach, and its performance in identifying a modal representation of a flexible beam is verified using experimental data.
AB - When identifying electrical, mechanical, or biological systems, parametric continuous-time identification methods can lead to interpretable and parsimonious models when the model structure aligns with the physical properties of the system. Traditional linear system identification may not consider the most parsimonious model when relying solely on unfactored transfer functions, which typically result from standard direct approaches. This paper presents a novel identification method that delivers additive models for both open and closed-loop setups. The estimators that are derived are shown to be generically consistent, and can admit the identification of marginally stable additive systems. Numerical simulations show the efficacy of the proposed approach, and its performance in identifying a modal representation of a flexible beam is verified using experimental data.
KW - continuous-time system identification
KW - parsimony
KW - closed-loop system identification
KW - refined instrumental variables
UR - http://www.scopus.com/inward/record.url?scp=85211166896&partnerID=8YFLogxK
U2 - 10.1016/j.automatica.2024.112013
DO - 10.1016/j.automatica.2024.112013
M3 - Article
AN - SCOPUS:85211166896
SN - 0005-1098
VL - 173
JO - Automatica
JF - Automatica
M1 - 112013
ER -