Torsten Söderström's home page


#Background
#Research_interests
#Teaching
#Research_projects
#Other_professional_activities
#Ordering_of_the_book_System_Identification
#Some_recent_publications


Background

I have a M Sc in engineering physics (Civilingenjör teknisk fysik), 1969, and a PhD in automatic control (Tekn Dr i reglerteknik), 1973, both from Lund Institute of Technology. I moved to Uppsala University in 1974, where I was a professor of automatic control until fall 2011, when I became professor emeritus. I was the head of the Department of Systems and Control 1975-1999. I am an IEEE Life Fellow and an IFAC Fellow.

Short CV

Research interests

My main research interests are in the fields of system identification, statistical signal processing, identification of continuous-time models,  error-in-variables problems, parameter estimation in infinite-dimensional systems, numerical algorithms in control and signal processing, adaptive filtering, and modelling and control of mechanical systems. 


Teaching

Undergraduate teaching

Fall 2012:
Automatic control II
Fall 2010:
Automatic control II 
More information
Automatic control III
More information
Fall 2009:
Control design (F4, IT4) 
Computer-controlled systems (W4, STS4) 
More information
Fall 2008:
Control design (F4, IT4) 
Computer-controlled systems (W4, STS4) 
More information
Fall 2007:
Automatic control (EI3, ES3, W3)
More information
Fall 2006:
Control design (F4, IT4) 
Computer-controlled systems (W4, STS4) 
More information
Fall 2005:
Control design (F4, IT4) 
Computer-controlled systems (W4, STS4) 
More information
Spring 2005:
System identification (F4, STS4) 
More information
Fall 2004:
Control design (F4, IT4) 
Computer-controlled systems (W4, STS4) 
More information
Fall 2003:
Control design (F4, IT4) 
Computer-controlled systems (W4, STS4) 
More information
Fall 2002:
Control design (F4, IT4) 
Computer-controlled systems (W4) 
More information
Spring 2002:
Adaptive systems (F4) 
Fall 2001:
Control design (F4, IT4) 
Computer-controlled systems (W4) 
More information
Spring 2001: 
Adaptive systems (F4) 
Fall 2000: 
Sampled-data control systems (F4) 
Computer-controlled systems (W4) 
More information

Teaching in the PhD programs

Fall 2013:
Stochastic dynamic systems, 10 units
Spring 2011:
Linear systems, 12 hp units
Spring 2009:
Stochastic dynamic systems, 10 units
Spring 2007:
Linear systems, 8 units
Spring 2005:
Recursive identification, 7 units
Spring 2003:
Stochastic dynamic systems, 10 units
Fall 2001:
Stochastic dynamic systems, 10 units
Spring 2001:
Recursive identification, 7 units
Fall 1999:
Stochastic dynamic systems, 10 units




Research projects

* Identification of continuous-time systems 
(part of the multiproject Statistical signal processing)

* Errors-in-variables modelling

* Identification of nonlinear systems
(part of the multiproject Statistical signal processing)

* Identification of viscoelastic materials
(a previous progress report for this project)

* Parameter estimation in heat conduction and diffusion 
(a previous progress report for this project)

* Control of waves, vibrations and stability in mechanical structures

* Numerical algorithms in systems and control

PhD students currently working in these projects: 
Hans Norlander, Agnes Rensfelt.

Recently graduated PhD's  engaged in these projects: 
Emad Abd-ElRady, Bharath Bhikkaji, Erik K. Larsson, Kaushik Mahata, Mei Hong Bjerstedt, Peter Nauclér.


Some other professional activities

Editor of Automatica, subject area System Parameter Estimation, 1992-present. 

Within IFAC, International Federation of Automatic Control
I was a Council member 1996-2002, 
Executive Board member 1999-2002, 
and Chair of the Awards Committee 1999-2002. 

Within EUCA, European Union Control Association
I was a Council member, 2001-2007.

The book 'System identification'

The textbook T. Söderström and P. Stoica: System Identification,
originally published by Prentice Hall International, is out of print.
It can, however, be freely downloaded:


Some recent publications

Full publication list

Books and book chapters
 

T. Söderström: How accurate can instrumental variable models become? In  L. Wang and H. Garnier, eds: System Identification, Environmental Modelling and Control, Springer-Verlag, 2012.

T. Söderström: Linear stochastic input-output models. Chapter 60 In W. Levine, ed.: The Control Handbook, Control System Advance Methods, 2nd ed,Taylor and Francis, UK, 2011.

E. K. Larsson, M. Mossberg and T. Söderström: Estimation of Continuous-time Stochastic System Parameters. In H. Garnier and L. Wang, eds.: Identification of Continuous-time Models from Sampled Data. Springer-Verlag, 2008.

T. Söderström: Identifying characteristics of viscoelastic materials from wave propagation experiments -- recent advances. In T. Glad and G. Hendeby, eds.: Forever Ljung in System Identification, Studentlitteratur, Lund, 2006.

T. Söderström: Identification of linear systems in time domain. Encyclopedia of Life Support Systems (EOLSS), developed under the auspices of Unesco, EOLSS publishers, Oxford, UK, 2003. [http://www.eolss.net]

T. Söderström: Prediction error methods. Encyclopedia of Life Support Systems (EOLSS), developed under the auspices of Unesco, EOLSS publishers, Oxford, UK, 2003. [http://www.eolss.net]

T. Söderström: Discrete-Time Stochastic Systems - Estimation and Control
Second edition, Springer-Verlag, London, UK, 2002. (375 pp)


Journal papers


T. Söderström, D. Kreiberg and M. Mossberg: Extended Accuracy Analysis of a Covariance Matching Approach for Identifying Errors-in-variables Systems. Automatica, vol 50, no 10, pp 2597-2605, October 2014.

T. Söderström, Y. Irshad, M. Mossberg and W. X. Zheng: Accuracy analysis of a covariance matching method for continuous-time errors-in-variables system identification. Automatica, vol 40, no 10, pp 2982-2993, October 2013.

H. Norlander, U. Valdek, B. Lundberg and T. Söderström: Parameter estimation from wave propagation tests on a tube perforated by helical slots. Mechanical Systems and Signal Processing, vol 40, no 1, pp 385-399, October 2013.

T. Söderström: Comparing some classes of bias-compensating least squares methods. Automatica, vol 49, no 3, pp 840-845, March 2013.

T. Söderström, L. Wang, R. Pintelon and J. Schoukens: Can Errors-in-variables Systems Be Identified from Closed-loop Experiments? Automatica, vol 49, no 2, pp 681-684, February 2013.

Y. Irshad, M. Mossberg and T. Söderström: System identification in a networked environment using second order statistical properties. Automatica, vol 49, pp 652-659, February 2013.

T. Söderström: System identification for the errors-in-variables problem. Transactions of the Institute of Measurement and Control, vol 34, no 7, pp 780-792, October 2012.

T. Söderström and A. Rensfelt: Estimation of material functions using system identification techniques. Control Engineering Practice, vol 20, no 10, pp 972-990, October 2012.

T. Söderström: A  generalized instrumental variable method for multivariable errors-in-variables identification problems. International Journal of Control, vol 85, no 3, pp 287-303, March 2012.

M. Mossberg and T. Söderström: Covariance matching for continuous-time errors-in-variables problems. IEEE Transactions on Automatic Control, vol 56, no 6, pp 1478-1483, June 2011.

H. Hjalmarsson, J. Mårtensson, C. Rojas and T. Söderström: On the accuracy in errors-in-variables identification compared to predition-error identification. Automatica, vol 47, no 12, pp 2704-2712, December 2011.

T. Söderström: A generalized instrumental variable method for errors-in-variables identification problems. Automatica, vol 47, no 8, pp 1656-1666, August 2011.

M. Mossberg and T. Söderström: Approximative weighting for covariance matching approach for identifying errors-in-variables systems. International Journal of Adaptive Control and Signal Processing, vol 25, no 6, pp 535-543, June 2011.

K. van Heusden, A. Karimi and T. Söderström: On identification methods  for direct data-driven controller . International Journal of Adaptive Control and Signal Processing. vol 25, no 5, pp 448-465, May 2011.

A. Rensfelt and T. Söderström: Parametric identification of complex modulus. Automatica, vol 47, no 4, pp 813-818, April 2011.

T. Söderström and M. Mossberg: Accuracy analysis of a covariance matching approach for identifying errors-in-variables systems. Automatica, vol 47, no 2, pp 272-282, February 2011.

A. Rensfelt and T. Söderström: Optimal excitation for nonparametric identification of viscoelastic materials. IEEE Transactions on Control Systems Technology, vol 19, no 1, pp 238-244, January 2011.

P. Nauclér and T. Söderström: Unbalance estimation using linear and nonlinear regression. Automatica, vol 46, no 11, pp 1752-1761, November 2010.

A. Rensfelt and T. Söderström: Structure testing of wave propagation models used in identification of viscoelastic materials. Automatica, vol 46, no 4, pp 728-734, April 2010.

T. Söderström, M. Hong, J. Schoukens and R. Pintelon: Accuracy Analysis of Time-domain Maximum Likelihood Method and Sample Maximum Likelihood Method for Errors-in-Variables and Output Error Identification. Automatica, vol 46, no 4, pp 721-727, April 2010.



Conference papers
 


T. Söderström,  R. Diversi and U. Soverini: A unified framework for EIV identification methods in the presence of mutually correlated noises. IFAC 19th World Congress, Cape Town, South Africa, August 24-29, 2014.

U. Soverini and T. Söderström: Frequency domain maximum likelihood identification of noisy input-output models. IFAC 19th World Congress, Cape Town, South Africa, August 24-29, 2014.

U. Soverini and T. Söderström: Frequency domain EIV identification: a Frisch Scheme approach. IFAC 19th World Congress, Cape Town, South Africa, August 24-29, 2014.

T. Söderström and J. Yuz: Model validation methods for errors-in-variables estimation. 52nd IEEE Conference on Decision and Control, December 10-13, 2013, Florence, Italy.

D. Kreiberg, T. Söderström and F. Wallentin: Errors-in-variables identification using covariance matching and structural equation modelling. 52nd IEEE Conference on Decision and Control, December 10-13 2013, Florence, Italy.

T. Söderström and L. Wang: On model order determination for errors-in-variables estimation. 16th IFAC Symposium on System Identification, Brussels, Belgium, July 11-13 2012.

T. Söderström: Model order determination based on rank properties of almost singular covariance matrices. 16th IFAC Symposium on System Identification, Brussels, Belgium, July 11-13 2012.

M. Mossberg and T. Söderström: On covariance matching for multiple input multiple output errors-in-variables systems. 16th IFAC Symposium on System Identification, Brussels, Belgium, July 11-13 2012.

T. Söderström, Y. Irshad, M. Mossberg and W. X. Zheng: Accuracy Analysis of a Covariance Matching Method for Continuous-time Errors-in-variables System Identification. 16th IFAC Symposium on System Identification, Brussels, Belgium, July 11-13 2012.

T. Söderström and A. Rensfelt: Estimation of material functions using system identification techniques. Invited plenary paper, 4th International Symposium on Advanced Control of Industrial Processes, Adconip, May 23-27, 2011, Hangzhou, China.

T. Söderström and M. Mossberg: Asymptotic accuracy of  covariance function based identifying errors-in-variables system parameter estimates. Proc. 49th IEEE Conference on Decision and Control, December 15-17, 2010, Atlanta, GA, USA.

T. Söderström: Errors-in-variables identification using a generalized instrumental variable method. Proc. 49th IEEE Conference on Decision and Control, December 15-17, 2010, Atlanta, GA, USA.

M. Mossberg, Y. Irshad and T. Söderström: Sub-optimal networked system identification based on covariance functions. NecSys '10, 2nd IFAC Workshop on Distributed Estimation and Control in Networked Systems, Annecy, France, September 13-14, 2010.

T. Söderström: System identification for the errors-in-variables problem. Invited plenary paper, UKACC International Conference on CONTROL 2010, 7-10 September 2010, Coventry, UK.



Last updated: 23 October 2014 by Torsten Söderström