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

作者：Ha Huong; Welsh James S; Alamir Mazen

来源：Automatica, 2018, 95: 455-462.

DOI：10.1016/j.automatica.2018.06.023

• Continuous time identification
• Time delay
• Useful redundancy
• Global optimization

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.

• 出版日期2018-9