Useful redundancy in parameter and time delay estimation for continuous-time models

Huong S Ha (1) , James S Welsh (1) , Mazen Alamir (2)

1 School of Electrical Engineering and Computer Science
2 GIPSA-SYSCO - GIPSA - Systèmes non linéaires et complexité

In this paper we propose an algorithm to estimate the parameters, including time delay, of continuous time systems based on instrumental variable identification methods. To overcome the multiple local minima of the cost function associated with the estimation of a time delay system, we utilize the useful redundancy technique. Specifically, the cost function is filtered through a set of low-pass filters to improve convexity with the useful redundancy technique exploited to achieve convergence to the global minimum of the optimization problem. Numerical examples are presented to demonstrate the effectiveness of the proposed algorithm.

Mots clés: time delay; filtering; useful redundancy; continuous time identification

Domaines: Automatique / Robotique

Huong S Ha, James S Welsh, Mazen Alamir. Useful redundancy in parameter and time delay estimation for continuous-time models. Automatica, 2018, 99 (sept.), pp.455-462. ⟨10.1016/j.automatica.2018.06.023⟩. ⟨hal-01500012⟩