Research

During my Ph.D., I mostly focused on the statistical analysis, design, and robustness issues of continuous-time system identification algorithms. I have also worked on finite-sample analysis of system identification methods, non-parametric system identification, control over networks, and Riccati equations.

If you are interested in the latest pdf version of any of the manuscripts that are mentioned here, please send me an e-mail. I am happy to discuss any topic!

Journal Publications

[J9] Consistency Analysis and Bias Elimination of the Instrumental Variable Based State Variable Filter Method
Siqi Pan, James S. Welsh, Rodrigo A. González and Cristian R. Rojas
Automatica, 2022

[J8] Refined instrumental variable methods for unstable continuous-time systems in closed-loop
Rodrigo A. González, Cristian R. Rojas, Siqi Pan and James S. Welsh
International Journal of Control, 2022

[J7] Theoretical and practical aspects of the convergence of the SRIVC estimator for over-parameterized models
Rodrigo A. González, Cristian R. Rojas, Siqi Pan and James S. Welsh
Automatica, 2022

[J6] Consistent identification of continuous-time systems under multisine input signal excitation
Rodrigo A. González, Cristian R. Rojas, Siqi Pan and James S. Welsh
Automatica, 2021

[J5] Efficiency Analysis of the Simplified Refined Instrumental Variable Method for Continuous-time Systems
Siqi Pan, James S. Welsh, Rodrigo A. González and Cristian R. Rojas
Automatica, 2020

[J4] Consistency Analysis of the Simplified Refined Instrumental Variable Method for Continuous-time Systems
Siqi Pan, Rodrigo A. González, James S. Welsh and Cristian R. Rojas
Automatica, 2019

[J3] On the existence of a stabilizing solution of Modified Algebraic Riccati Equations in terms of standard Algebraic Riccati Equations and Linear Matrix Inequalities
Francisco J. Vargas and Rodrigo A. González
IEEE Control Systems Letters, 2019

[J2] Necessary and sufficient conditions for mean square stabilization over MIMO SNR-Constrained channels with colored and spatially correlated additive noises
Rodrigo A. González, Francisco J. Vargas and Jie Chen
IEEE Transactions on Automatic Control, 2019

[J1] Optimal enforcement of causality in non-parametric transfer function estimation
Rodrigo A. González, Patricio E. Valenzuela, Cristian R. Rojas, Ricardo A. Rojas
IEEE Control Systems Letters, 2017

Peer-reviewed Conference Publications

[C8] The SRIVC algorithm for continuous-time system identification with arbitrary input excitation in open and closed loop
Rodrigo A. González, Cristian R. Rojas, Siqi Pan and James S. Welsh
60th IEEE Conference on Decision and Control (CDC), Austin, Texas, USA, December 2021

[C7] Non-causal regularized least-squares for continuous-time system identification with band-limited input excitations
Rodrigo A. González, Cristian R. Rojas and Håkan Hjalmarsson
60th IEEE Conference on Decision and Control (CDC), Austin, Texas, USA, December 2021

[C6] A Finite-Sample Deviation Bound for Stable Autoregressive Processes
Rodrigo A. González and Cristian R. Rojas
2nd conference on Learning for Decision and Control (L4DC), Berkeley, USA, 2020

[C5] Enforcing stability through ellipsoidal inner approximations in the indirect approach for continuous-time system identification
Rodrigo A. González, James S. Welsh and Cristian R. Rojas
21st IFAC World Congress, Berlin, Germany, July 2020

[C4] Finite sample deviation and variance bounds for first order autoregressive processes
Rodrigo A. González and Cristian R. Rojas
45th International Conference on Acoustics, Speech, and Signal Processing (ICASSP), Barcelona, Spain, May 2020

[C3] An asymptotically optimal indirect approach to continuous-time system identification
Rodrigo A. González, James S. Welsh and Cristian R. Rojas
57th IEEE Conference on Decision and Control (CDC), Miami Beach, FL, USA, December 2018

[C2] A fully Bayesian approach to kernel-based regularization for impulse response estimation
Rodrigo A. González and Cristian R. Rojas
18th IFAC Symposium on System Identification (SYSID), Stockholm, Sweden, July 2018

[C1] Stabilization of MIMO systems over additive correlated noise channels subject to multiple SNR-constraints
Rodrigo A. González, Francisco J. Vargas and Jie Chen
16th European Control Conference (ECC), Limassol, Cyprus, June 2018

Submitted Journal papers

[SJ2] On the Relation between Discrete and Continuous-time Refined Instrumental Variable Methods
Rodrigo A. González, Cristian R. Rojas, Siqi Pan and James S. Welsh
Submitted, September 2022

[SJ1] Consistency analysis of refined instrumental variable methods for continuous-time system identification in closed-loop
Rodrigo A. González, Siqi Pan, Cristian R. Rojas and James S. Welsh
Submitted, April 2022

Submitted Conference papers

[SC4] Blind Non-parametric Estimation of SISO Continuous-time Systems
Augustus Elton, Rodrigo A. González, James S. Welsh, Tom Oomen and Cristian R. Rojas
Submitted, November 2022

[SC3] Parsimonious Identification of Continuous-time Systems: A Block-coordinate Descent Approach
Rodrigo A. González, Cristian R. Rojas, Siqi Pan and James S. Welsh
Submitted, November 2022

[SC2] Identifying Lebesgue-sampled Continuous-time Impulse Response Models: A Kernel-based Approach
Rodrigo A. González, Koen Tiels and Tom Oomen
Submitted, November 2022

[SC1] An EM Algorithm for Lebesgue-sampled State-space Continuous-time System Identification
Rodrigo A. González, Angel L. Cedeño, María Coronel, Juan C. Agüero and Cristian R. Rojas
Submitted, November 2022

Non-peer-reviewed Presentations and Posters

[P6] Identification of continuous-Time systems utilizing Lebesgue-sampled data
Rodrigo A. González, Angel L. Cedeño, María Coronel, Juan C. Agüero and Cristian R. Rojas
Poster ERNSI Workshop in System Identification, Leuven, Belgium, September 2022

[P5] Non-causal regularized least-squares for continuous-time system identification with band-limited input excitations
Rodrigo A. González, Cristian R. Rojas and Håkan Hjalmarsson
Poster ERNSI Workshop in System Identification, online, September 2021

[P4] An asymptotically optimal indirect approach to continuous-time system identification
Rodrigo A. González, James S. Welsh and Cristian R. Rojas
Presentation in internal seminar series, University of Newcastle, NSW, Australia, December 2019

[P3] Consistency of the Simplified Refined Instrumental Variable Method for Continuous-time Systems: Analysis and Design
Rodrigo A. González, Siqi Pan, Cristian R. Rojas and James S. Welsh
Poster ERNSI Workshop in System Identification, Maastricht, Netherlands, September 2019

[P2] An asymptotically optimal indirect approach to continuous-time system identification
Rodrigo A. González, James S. Welsh and Cristian R. Rojas
Poster ERNSI Workshop in System Identification, Cambridge, U.K., September 2018

[P1] An asymptotically optimal indirect approach to continuous-time system identification
Rodrigo A. González, James S. Welsh and Cristian R. Rojas
Presentation Swedish Control Conference, Stockholm, Sweden, June 2018

Theses and Books

[T3]Continuous-time System Identification: Refined Instrumental Variables and Sampling Assumptions
Rodrigo A. González
Ph.D. Thesis, KTH Royal Institute of Technology, Stockholm, Sweden, May 2022

[T2]Consistency and efficiency in continuous-time system identification
Rodrigo A. González
Licentiate Thesis, KTH Royal Institute of Technology, Stockholm, Sweden, June 2020

[B1]Exercise Compendium of Linear Systems Analysis (in Spanish)
Rodrigo A. González
Exercise book , Stockholm, Sweden, July 2019

[T1]Enforcement of Causality and Passivity in Spectral Analysis (in Spanish)
Rodrigo A. González
MSc Thesis, Universidad Técnica Federico Santa María, Valparaíso, Chile, November 2016