Search Results for author: James S. Welsh

Found 7 papers, 0 papers with code

Statistical Analysis of Block Coordinate Descent Algorithms for Linear Continuous-time System Identification

no code implementations13 Apr 2024 Rodrigo A. González, Koen Classens, Cristian R. Rojas, James S. Welsh, Tom Oomen

Block coordinate descent is an optimization technique that is used for estimating multi-input single-output (MISO) continuous-time models, as well as single-input single output (SISO) models in additive form.

Consistency analysis of refined instrumental variable methods for continuous-time system identification in closed-loop

no code implementations13 Apr 2024 Rodrigo A. González, Siqi Pan, Cristian R. Rojas, James S. Welsh

In this paper, we address the consistency of the simplified refined instrumental variable method for continuous-time systems (SRIVC) and its closed-loop variant CLSRIVC when they are applied on data that is generated from a feedback loop.

Identification of Additive Continuous-time Systems in Open and Closed-loop

no code implementations2 Jan 2024 Rodrigo A. González, Koen Classens, Cristian R. Rojas, James S. Welsh, Tom Oomen

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.

Additive models

On the Relation between Discrete and Continuous-time Refined Instrumental Variable Methods

no code implementations31 May 2023 Rodrigo A. González, Cristian R. Rojas, Siqi Pan, James S. Welsh

The Refined Instrumental Variable method for discrete-time systems (RIV) and its variant for continuous-time systems (RIVC) are popular methods for the identification of linear systems in open-loop.

Relation

Parsimonious Identification of Continuous-Time Systems: A Block-Coordinate Descent Approach

no code implementations6 Apr 2023 Rodrigo A. González, Cristian R. Rojas, Siqi Pan, James S. Welsh

The identification of electrical, mechanical, and biological systems using data can benefit greatly from prior knowledge extracted from physical modeling.

Consistency Analysis of the Closed-loop SRIVC Estimator

no code implementations23 Mar 2021 Siqi Pan, James S. Welsh, Rodrigo A. Gonzalez, Cristian R. Rojas

The Consistency of the Closed-Loop Simplified Refined Instrumental Variable method for Continuous-time system (CLSRIVC) is analysed based on sampled data.

Aligning Manifolds of Double Pendulum Dynamics Under the Influence of Noise

no code implementations19 Sep 2018 Fayeem Aziz, Aaron S. W. Wong, James S. Welsh, Stephan K. Chalup

This study presents the results of a series of simulation experiments that evaluate and compare four different manifold alignment methods under the influence of noise.

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