Least-squares parameter estimation for statespace models with state equality constraints.

Nenhuma Miniatura disponível
Data
2021
Título da Revista
ISSN da Revista
Título de Volume
Editor
Resumo
If a dynamic system has active constraints on the state vector and they are known, then taking them into account during modeling is often advantageous. Unfortunately, in the constrained discrete-time state-space estimation, the state equality constraint is defined for a parameter matrix and not on a parameter vector as commonly found in regression problems. To address this problem, firstly, we show how to rewrite the state equality constraints as equality constraints on the state matrices to be estimated. Then, we vectorise the matricial least squares problem defined for modeling statespace systems such that any method from the equality-constrained least squares framework may be employed. Both time-invariant and time-varying cases are considered as well as the case where the state equality constraint is not exactly known.
Descrição
Palavras-chave
State equality constraints, State-space modeling, Gray-box modeling, Constrained estimation
Citação
RICCO, R. A.; TEIXEIRA, B. O. S. Least-squares parameter estimation for statespace models with state equality constraints. International Journal of Systems Science, v. 53, n. 1, jun. 2021. Disponível em: <https://www.tandfonline.com/doi/abs/10.1080/00207721.2021.1936273>. Acesso em: 12 set. 2021.