# Martin Enqvist: Publications

The following list of publications has been generated automatically from the DiVA database.

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## Journal papers

2023

Fredrik Ljungberg, Jonas Linder, Martin Enqvist, Kalevi Tervo,
"Dictionary-based experiment design for estimation of marine models",
Control Engineering Practice,
135,
2023.

2020

Roger Larsson, Alejandro Sobrón Rueda, David Lundström, Martin Enqvist,
"A Method for Improved Flight Testing of Remotely Piloted Aircraft Using Multisine Inputs",
AEROSPACE,
7(9),
2020.

Harm H. M. Weerts, Jonas Linder, Martin Enqvist, Paul M. J. Van den Hof,
"Abstractions of linear dynamic networks for input selection in local module identification",
Automatica,
117,
2020.

2019

Fredrik Ljungberg, Martin Enqvist,
"Obtaining Consistent Parameter Estimators for Second-Order Modulus Models",
IEEE Control Systems Letters,
3(4):
781-786, 2019.

2017

Jonas Linder, Martin Enqvist,
"Identification of systems with unknown inputs using indirect input measurements",
International Journal of Control,
90(4):
729-745, 2017.

Jesica Escobar, Martin Enqvist,
"INSTRUMENTAL VARIABLES AND LSM IN CONTINUOUS-TIME PARAMETER ESTIMATION",
ESAIM,
23(2):
427-442, 2017.

2013

Ylva Jung, Jonas Fritzin, Martin Enqvist, Atila Alvandpour,
"Least-Squares Phase Predistortion of a +30dBm Class-D Outphasing RF PA in 65nm CMOS",
IEEE Transactions on Circuits and Systems Part 1,
60(7):
1915-1928, 2013.

2011

Jonas Fritzin, Ylva Jung, Per Niklas Landin, Peter Handel, Martin Enqvist, Atila Alvandpour,
"Phase Predistortion of a Class-D Outphasing RF Amplifier in 90 nm CMOS",
IEEE Transactions on Circuits and Systems - II - Express Briefs,
58(10):
642-646, 2011.

Martin Enqvist,
"Separability of Scalar Random Multisine Signals",
Automatica,
47(9):
1860-1867, 2011.

Christian Lyzell, Torkel Glad, Martin Enqvist, Lennart Ljung,
"Difference Algebra and System Identification",
Automatica,
47(9):
1896-1904, 2011.

2008

Johan Schoukens, Rik Pintelon, Martin Enqvist,
"Study of the LTI Relations between the Outputs of two Coupled Wiener Systems and its Application to the Generation of Initial Estimates for Wiener–Hammerstein Systems",
Automatica,
44(7):
1654-1665, 2008.

Lieve Lauwers, Johan Schoukens, Rik Pintelon, Martin Enqvist,
"A Nonlinear Block Structure Identification Procedure using Frequency Response Function Measurements",
IEEE Transactions on Instrumentation and Measurement,
57(10):
2257-2264, 2008.

2005

Martin Enqvist, Lennart Ljung,
"Linear Approximations of Nonlinear FIR Systems for Separable Input Processes",
Automatica,
41(3):
459-473, 2005.

## Books

2024

Torkel Glad, Lennart Ljung, Martin Enqvist,
"Reglerteknik: grundläggande teori",
Studentlitteratur AB, Lund,
2024.

AbstractKeywordsBiBTeX

## Book chapters

2010

Martin Enqvist,
"Identification of Block-oriented Systems Using the Invariance Property",
Block-Oriented Nonlinear System Identification, Lecture Notes in Control and Information Sciences,
No. 404,
147-158, 2010.

## Conference papers

2023

Stefanie Antonia Zimmermann, Martin Enqvist, Svante Gunnarsson, Stig Moberg, Mikael Norrlöf,
"Experimental evaluation of a method for improving experiment design in robot identification",
2023 IEEE International Conference on Robotics and Automation (ICRA),
11432-11438, 2023.

2022

Stefanie Antonia Zimmermann, Martin Enqvist, Svante Gunnarsson, Stig Moberg, Mikael Norrlöf,
"Improving experiment design for frequency-domain identification of industrial robots",
IFAC-PapersOnLine,
475-480, 2022.

2020

Fredrik Ljungberg, Martin Enqvist,
"Consistent Parameter Estimators for Second-order Modulus Systems with Non-additive Disturbances",
IFAC PAPERSONLINE,
1132-1137, 2020.

Du Ho, Gustaf Hendeby, Martin Enqvist,
"A sensor-to-sensor model-based change detection approach for quadcopters",
Proceedings of the 21st IFAC World Congress, 2020, IFAC PapersOnline,
712-717, 2020.

2018

Du Ho, Martin Enqvist,
"On the equivalence of inverse and forward IV estimators with application to quadcopter modeling",
18th IFAC Symposium on System Identification (SYSID), Proceedings, IFAC papers online,
951-956, 2018.

2017

Jonas Linder, Martin Enqvist,
"Identification and Prediction in Dynamic Networks with Unobservable Nodes",
IFAC PAPERSONLINE, IFAC Papers Online,
10574-10579, 2017.

Du Ho, Jonas Linder, Gustaf Hendeby, Martin Enqvist,
"Vertical modeling of a quadcopter for mass estimation and diagnosis purposes",
Proceedings of the Workshop on Research, Education and Development on Unmanned Aerial Systems, RED-UAS, Linköping, Sweden, 3-5 October, 2017,
2017.

Du Ho, Jonas Linder, Gustaf Hendeby, Martin Enqvist,
"Mass estimation of a quadcopter using IMU data",
2017 International Conference on Unmanned Aircraft Systems (ICUAS), June 13-16, 2017, Miami, FL, USA,
1260-1266, 2017.

2015

Ylva Jung, Martin Enqvist,
"On estimation of approximate inverse models of block-oriented systems",
Proceedings of the 17th IFAC Symposium on System Identification, IFAC-PapersOnLine,
Vol. 48(28),
1226-1231, 2015.

Jonas Linder, Martin Enqvist,
"On Indirect Input Measurements",
Proceedings of the 17th IFAC Symposium on System Identification, IFAC-PapersOnLine,
Vol. 48(28),
104-109, 2015.

Jonas Linder, Martin Enqvist, Thor I. Fossen, Tor Arne Johansen, Fredrik Gustafsson,
"Online Estimation of Ship's Mass and Center of Mass Using Inertial Measurements",
Proceedings of the 10th Conference on Manoeuvring and Control of Marine Craft, IFAC-PapersOnLine,
Vol. 48(16),
2015.

Jonas Linder, Martin Enqvist, Thor I. Fossen, Tor Arne Johansen, Fredrik Gustafsson,
"Modeling for IMU-based Online Estimation of a Ship's Mass and Center of Mass",
Proceedings of the 10th Conference on Manoeuvring and Control of Marine Craft, IFAC-PapersOnLine,
Vol. 48(16),
2015.

2014

Maryam Sadeghi, Martin Enqvist, Fredrik Gustafsson,
"IMU-based vehicle load estimation under normal driving conditions",
Proceedings of the 53rd IEEE Conference on Decision and Control,
3376-3381, 2014.

Jonas Linder, Martin Enqvist, Fredrik Gustafsson,
"A Closed-loop Instrumental Variable Approach to Mass and Center of Mass Estimation Using IMU Data",
Proceedings of the 53rd Conference on Decision and Control,
283-289, 2014.

Jonas Linder, Martin Enqvist, Fredrik Gustafsson, Johan Sjöberg,
"Identifiability of physical parameters in systems with limited sensors",
Proceedings of the 19th IFAC World Congress, IFAC-PapersOnLine,
Vol. 47(3),
6454-6459, 2014.

2013

Maarten Schoukens, Christian Lyzell, Martin Enqvist,
"Combining the best linear approximation and dimension reduction to identify the linear blocks of parallel Wiener systems",
Proceedings of the 11th IFAC International Workshop on Adaptation and Learning in Control and Signal Processing, IFAC-PapersOnLine,
Vol. 46(11),
372-377, 2013.

Maryam Sadeghi Reineh, Martin Enqvist, Fredrik Gustafsson,
"Detection of Roof Load for Automotive Safety Systems",
Proceedings of the 52nd IEEE Conference on Decision and Control,
2840-2845, 2013.

Ylva Jung, Martin Enqvist,
"Estimating models of inverse systems",
Proceedings of the 52nd IEEE Conference on Decision and Control,
7143-7148, 2013.

2012

Christian Lyzell, Martin Andersen, Martin Enqvist,
"A Convex Relaxation of a Dimension Reduction Problem Using the Nuclear Norm",
Proceedings of the 51st IEEE Conference on Decision and Control,
2852-2857, 2012.

Christian Lyzell, Martin Enqvist,
"Inverse Regression for the Wiener Class of Systems",
Proceedings of the 16th IFAC Symposium on System Identification, IFAC-PapersOnLine,
Vol. 45(16),
476-481, 2012.

Christian Lyzell, Martin Enqvist,
"Sliced Inverse Regression for the Identification of Dynamical Systems",
Proceedings of the 16th IFAC Symposium on System Identification, IFAC-PapersOnLine,
Vol. 45(16),
1575-1580, 2012.

Jesica Escobar, Martin Enqvist,
"On the Detection of Nonlinearities in Sampled Data",
Proceedings of the 16th IFAC Symposium on System Identification, IFAC-PapersOnLine,
Vol. 45(16),
1587-1592, 2012.

Roger Larsson, Martin Enqvist,
"Sequential Aerodynamic Model Parameter Identification",
Proceedings of the 16th IFAC Symposium on System Identification, IFAC-PapersOnLine,
Vol. 45(16),
1413-1418, 2012.

2009

Christian Lyzell, Martin Enqvist, Roland Toth, Peter S. C. Heuberger, Paul M. J. Van den Hof,
"Order and Structural Dependence Selection of LPV-ARX Models using a Nonnegative Garrote Approach",
Proceedings of the 48th IEEE Conference on Decision and Control held jointly with the 28th Chinese Control Conference,
7406-7411, 2009.

Roger Larsson, Martin Enqvist,
"Real-time Aerodynamic Model Parameter Identification",
Proceedings of the 40th Annual International Symposium of the Society of Flight Test Engineers,
113-122, 2009.

AbstractKeywordsBiBTeX

Roger Larsson, Zoran Sjanic, Martin Enqvist, Lennart Ljung,
"Direct Prediction-Error Identification of Unstable Nonlinear Systems Applied to Flight Test Data",
Proceedings of the 15th IFAC Symposium on System Identification, IFAC-PapersOnLine,
Vol. 42(10),
144-149, 2009.

Martin Enqvist,
"Nonlinearity Detection and Impulse Response Estimation Using a Weighting Approach",
Proceedings of 15th IFAC Symposium on System Identification, IFAC-PapersOnLine,
Vol. 42(10),
628-633, 2009.

Christian Lyzell, Martin Enqvist, Lennart Ljung,
"Handling Certain Structure Information in Subspace Identification",
Proceedings of the 15th IFAC Symposium on System Identification, IFAC-PapersOnLine,
Vol. 42(10),
90-95, 2009.

Christian Lyzell, Torkel Glad, Martin Enqvist, Lennart Ljung,
"Identification Aspects of Ritt's Algorithm for Discrete-Time Systems",
Proceedings of the 15th IFAC Symposium on System Identification, IFAC-PapersOnLine,
Vol. 42(10),
681-686, 2009.

2007

Martin Enqvist,
"A Weighting Method for Approximate Nonlinear System Identification",
Proceedings of the 46th IEEE Conference on Decision and Control,
5104-5109, 2007.

Martin Enqvist, Johan Schoukens, Rik Pintelon,
"Detection of Unmodeled Nonlinearities Using Correlation Methods",
Proceedings of the 2007 IEEE Instrumentation and Measurement Technology Conference,
1-6, 2007.

2006

Lieve Lauwers, Johan Schoukens, Rik Pintelon, Martin Enqvist,
"Nonlinear Structure Analysis Using the Best Linear Approximation",
Proceedings of the 2006 International Conference on Noise and Vibration Engineering,
2751-2760, 2006.

AbstractKeywordsBiBTeX

Märta Barenthin, Martin Enqvist, Bo Wahlberg, Håkan Hjalmarsson,
"Gain Estimation for Hammerstein Systems",
Proceedings of the 14th IFAC Symposium on System Identification, IFAC-PapersOnLine,
Vol. 39(1),
784-789, 2006.

Martin Enqvist,
"Identification of Hammerstein Systems Using Separable Random Multisines",
Proceedings of the 14th IFAC Symposium on System Identification, IFAC-PapersOnLine,
Vol. 39(1),
768-773, 2006.

2005

Martin Enqvist,
"Benefits of the Input Minimum Phase Property for Linearization of Nonlinear Systems",
Proceedings of the 2005 International Symposium on Nonlinear Theory and Its Applications,
618-, 2005.

AbstractKeywordsBiBTeX

Torkel Glad, Anders Helmersson, Martin Enqvist, Lennart Ljung,
"Controllers for Amplitude Limited Model Error Models",
Proceedings of the 16th IFAC World Congress, IFAC-PapersOnLine,
Vol. 38(1),
662-662, 2005.

Jacob Roll, Martin Enqvist, Lennart Ljung,
"Consistent Nonparametric Estimation of NARX Systems Using Convex Optimization",
Proceedings of the 44th IEEE Conference on Decision and Control and European Control Conference,
3129-3134, 2005.

Martin Enqvist, Svante Gunnarsson, Mikael Norrlöf, Erik Wernholt, Anders Hansson,
"The CDIO Initiative from an Automatic Control Project Course Perspective",
Proceedings of the 16th IFAC World Congress, IFAC-PapersOnLine,
Vol. 38(1),
2283-2283, 2005.

2004

Martin Enqvist, Lennart Ljung,
"LTI Approximations of Slightly Nonlinear Systems: Some Intriguing Examples",
Proceedings of the 6th IFAC Symposium on Nonlinear Control Systems,
639-, 2004.

AbstractKeywordsBiBTeX

Martin Enqvist, Lennart Ljung,
"LTI Approximations of Slightly Nonlinear Systems: Some Intriguing Examples",
Proceedings of Reglermöte 2004,
2004.

AbstractKeywordsBiBTeX

2003

Martin Enqvist,
"Linear Models of Nonlinear FIR Systems with Gaussian Inputs",
Proceedings of the 13th IFAC Symposium on System Identification,
1910-1915, 2003.

AbstractKeywordsBiBTeX

2002

Martin Enqvist,
"Linear Models of Nonlinear FIR Systems with Gaussian Inputs",
Proceedings of the 4th Conference on Computer Science and Systems Engineering,
147-151, 2002.

AbstractKeywordsBiBTeX

Martin Enqvist, Lennart Ljung,
"Approximation of Non-Linear Systems in a Neighborhood of LTI Systems",
Proceedings of Reglermöte 2002,
289-291, 2002.

KeywordsBiBTeX

Martin Enqvist, Lennart Ljung,
"Estimating Nonlinear Systems in a Neighborhood of LTI-approximants",
Proceedings of the 41st IEEE Conference on Decision and Control,
1005-1010 vol.1, 2002.

## Theses

2005

Martin Enqvist,
"Linear Models of Nonlinear Systems",
Linköping Studies in Science and Technology. Dissertations,
No. 985,
2005.

2003

Martin Enqvist,
"Some Results on Linear Models of Nonlinear Systems",
Linköping Studies in Science and Technology. Thesis,
No. 1046,
2003.

AbstractKeywordsBiBTeX

## Reports

2016

Jonas Linder, Martin Enqvist,
"Identification and prediction in dynamic networks with unobservable nodes",
LiTH-ISY-R,
No. 3095,
2016.

2015

Jonas Linder, Martin Enqvist, Thor I. Fossen, Tor Arne Johansen, Fredrik Gustafsson,
"Modeling for IMU-based Online Estimation of a Ship's Mass and Center of Mass",
LiTH-ISY-R,
No. 3082,
2015.

Jonas Linder, Martin Enqvist, Thor I. Fossen, Tor Arne Johansen, Fredrik Gustafsson,
"Online Estimation of Ship's Mass and Center of Mass Using Inertial Measurements",
LiTH-ISY-R,
No. 3081,
2015.

2012

Maarten Schoukens, Christian Lyzell, Martin Enqvist,
"Combining the best linear approximation and dimension reduction to identify thelinear blocks of parallel Wiener systems",
LiTH-ISY-R,
No. 3050,
2012.

2011

Christian Lyzell, Martin Enqvist,
"Inverse Regression for the Wiener Class of Systems",
LiTH-ISY-R,
No. 3032,
2011.

Christian Lyzell, Martin Enqvist,
"Sliced Inverse Regression for the Identification of Dynamical Systems",
LiTH-ISY-R,
No. 3031,
2011.

2010

Roland Toth, Christian Lyzell, Martin Enqvist, Peter S.C. Heuberger, Paul M. J. Van den Hof,
"Order and Structural Dependence Selection of LPV-ARX Models using a Nonnegative Garrote Approach",
LiTH-ISY-R,
No. 2937,
2010.

2009

Christian Lyzell, Martin Enqvist, Lennart Ljung,
"Handling Certain Structure Information in Subspace Identification",
LiTH-ISY-R,
No. 2890,
2009.

Christian Lyzell, Torkel Glad, Martin Enqvist, Lennart Ljung,
"Identification Aspects of Ritt's Algorithm for Discrete-Time Systems",
LiTH-ISY-R,
No. 2891,
2009.

2007

Martin Enqvist,
"A Weighting Method for Approximate Nonlinear System Identification",
LiTH-ISY-R,
No. 2829,
2007.

2005

Jacob Roll, Martin Enqvist, Lennart Ljung,
"Consistent Nonparametric Estimation of NARX Systems Using Convex Optimization",
LiTH-ISY-R,
No. 2721,
2005.

Martin Enqvist,
"Identification of Hammerstein Systems Using Separable Random Multisines",
LiTH-ISY-R,
No. 2722,
2005.

Martin Enqvist, Lennart Ljung,
"Linear Approximations of Nonlinear FIR Systems for Separable Input Processes",
LiTH-ISY-R,
No. 2718,
2005.

Torkel Glad, Anders Helmersson, Martin Enqvist, Lennart Ljung,
"Controllers for Amplitude Limited Model Error Models",
LiTH-ISY-R,
No. 2719,
2005.

Martin Enqvist,
"Benefits of the Input Minimum Phase Property for Linearization of Nonlinear Systems",
LiTH-ISY-R,
No. 2720,
2005.

Martin Enqvist, Lennart Ljung,
"LTI Approximations of Slightly Nonlinear Systems: Some Intriguing Examples",
LiTH-ISY-R,
No. 2655,
2005.

2004

Martin Enqvist, Svante Gunnarsson, Mikael Norrlöf, Erik Wernholt, Anders Hansson,
"The CDIO Initiative from an Automatic Control Project Course Perspective",
LiTH-ISY-R,
No. 2651,
2004.

2002

Martin Enqvist,
"Linear Models of Nonlinear FIR Systems with Gaussian Inputs",
LiTH-ISY-R,
No. 2462,
2002.

Martin Enqvist, Lennart Ljung,
"Estimating Nonlinear Systems in a Neighborhood of LTI-approximants",
LiTH-ISY-R,
No. 2459,
2002.

Martin Enqvist,
"Variance-Bias Tradeoff in Finite Impulse Response Estimates Obtained by Correlation Analysis",
LiTH-ISY-R,
No. 2416,
2002.

## Associate Professor in Automatic Control

**(Swedish: Universitetslektor och docent i reglerteknik)**

**Phone:**- +46 13 281393

**Mobile:**- +46 70 0895175

**E-mail:**- martin.enqvist_at_liu.se

**Address:**- Dept. of Electrical Engineering
- Linköping University
- SE-581 83 Linköping
- Sweden

**Visiting Address:**- Campus Valla
- Building B
- Room 2A:552 (in the A corridor on the ground floor between entrance 25 and 27)

Page responsible: Martin Enqvist

Last updated: 2012-10-31