Prof. Dr. rer. nat. Björn Rüffer

Portraitfoto Prof. Björn Rüffer


Coudraystraße 13B, Raum 104
99423 Weimar

E-mail: bjoern.rueffer[at]
Telefon: +49 (0) 3643/58 42 76

persönliche Homepage


  • 2004, Master of Science in Mathematics, The University of Warwick, UK
  • 2007, Dr. rer. nat., Angewandte Mathematik, Universität Bremen

Akademische Stationen

seit 2022Bauhaus-Universität Weimar
2015–2022The University of Newcastle, Australia
Mai–Juni 2018University of British Columbia, Okanagan, Canada
April–September 2014Universität Passau
2011–2015Universityät Paderborn
February–May 2010Kyushu Institute of Technology, Iizuka, Japan
2009–2011University of Melbourne, Australia
2007–2009University of Newcastle, Australia
2004–2007Universität Bremen



  • Mathematische Systemtheorie
  • Differentialgleichungen
  • Optimierung
  • Anwendungen


(zuletzt aktualisiert Februar 2022)

Hocking, Sweatman, Maldon, Boral, Braun, Kurihara, Meylan, Rüffer, Thamwattana
Hyper Q Aerospace: Aerodynamics and Control of Next Generation Electric Rotorcraft
ANZIAM Journal, 2021. Accepted for publication on 16 May 2021

Ito, Rüffer
A Left Eigenvector Producing a Smooth Lyapunov Function of ISS Networks
Positive Systems: Theory and Applications (POSTA 2018), 2019

Giladi, Rüffer
A Lyapunov function construction for a non-convex Douglas–Rachford iteration
J. Optim. Th. Appl., 2019

Guiver, Logemann, Rüffer
Small-gain stability theorems for positive Lur'e inclusions
Positivity, 2019

Tran, Rüffer, Kellett
Convergence Properties for Discrete-time Nonlinear Systems
IEEE Trans. Autom. Control, 2019

Giladi, Rüffer
A Perron-Frobenius type result for integer maps and applications
Positivity, 2019

Noroozi, Geiselhart, Grüne, Rüffer, Wirth
Nonconservative Discrete-Time ISS Small-Gain Conditions for Closed Sets
IEEE Trans. Autom. Control, 2018

Nonlinear left and right eigenvectors for max-preserving maps
Positive Systems, 2017

Tran, Rüffer, Kellett
Incremental Stability Properties for Discrete-Time Systems
Proc. 55th IEEE Conf. Decis. Control, 2016

Rüffer, Ito
Sum-separable Lyapunov functions for networks of ISS systems: A gain function approach
Proc. 54th IEEE Conf. Decis. Control, 2015

Dirr, Ito, Rantzer, Rüffer
Separable Lyapunov functions: Constructions and limitations
Discrete Contin. Dyn. Syst. Ser. B, 2015

Ito, Rüffer, Rantzer
Max- and sum-separable Lyapunov functions for monotone systems and their level sets
Proc. 53rd IEEE Conf. Decis. Control, 2014

Noroozi, Rüffer
Non-conservative dissipativity and small-gain theory for ISS networks
Proc. 53rd IEEE Conf. Decis. Control, 2014

Rüffer, Sailer
Input-to-State Stability for Discrete-Time Monotone Systems
Proc. 21st Int. Symp. Mathematical Theory of Networks and Systems (MTNS), 2014

Rantzer, Rüffer, Dirr
Separable Lyapunov functions for monotone systems
Proc. 52nd IEEE Conf. Decis. Control, 2013

Pogromsky, Matveev, Chaillet, Rüffer
Input-dependent stability analysis of systems with saturation in feedback
Proc. 52nd IEEE Conf. Decis. Control, 2013

Chaillet, Pogromsky, Rüffer
A Razumikhin approach for the incremental stability of delayed nonlinear systems
Proc. 52nd IEEE Conf. Decis. Control, 2013

Ito, Jiang, Dashkovskiy, Rüffer
Robust stability of networks of iISS systems: Construction of sum-type Lyapunov functions
IEEE Trans. Autom. Control, 2013

Ito, Rüffer
A Two-Phase Approach to Stability of Networks Given in iISS Framework: Utilization of a Matrix-Like Criterion
Proc. IEEE American Contr. Conf., 2013

Rüffer, Wouw, Mueller
Convergent Systems vs. Incremental Stability
Systems Control Lett., 2013

Dashkovskiy, Rüffer, Wirth
Small gain theorems for large scale systems and construction of ISS Lyapunov functions
Proc. 51st IEEE Conf. Decis. Control, 2012

Ito, Jiang, Dashkovskiy, Rüffer
A cyclic small-gain condition and an equivalent matrix-like criterion for iISS networks
Proc. 51st IEEE Conf. Decis. Control, 2012

Rüffer, Wouw, Mueller
From convergent dynamics to incremental stability
Proc. 51st IEEE Conf. Decis. Control, 2012

Dashkovskiy, Jiang, Rüffer
Editorial: Special issue on robust stability and control of large-scale nonlinear systems
Math. Control Signals Syst., 2012

Discussion on ``On a small gain theorem for ISS networks in dissipative Lyapunov form''
Eur. J. Control, 2011

Ito, Jiang, Dashkovskiy, Rüffer
A Small-Gain Theorem and Construction of Sum-Type Lyapunov Functions for Networks of iISS Systems
Proc. IEEE American Contr. Conf., 2011

Rüffer, Wirth
Stability verification for monotone systems using homotopy algorithms
Numer. Algorithms, 2011

Rüffer, Ito, Dower
Computing asymptotic gains of large-scale interconnections
Proc. 49th IEEE Conf. Decis. Control, 2010

Rüffer, Dower, Ito
Computational comparison principles for large-scale system stability analysis
Proc. of the 10th SICE Annual Conference on Control Systems, 2010

Rüffer, Kellett, Dower
On copositive Lyapunov functions for a class of monotone systems
Proc. 19th Int. Symp. Math. Th. Networks Systems (MTNS), 2010

Rüffer, Dower, Kellett, Weller
On robust stability of the Belief Propagation Algorithm for LDPC decoding
Proc. 19th Int. Symp. Math. Th. Networks Systems (MTNS), 2010

Small-gain conditions and the comparison principle
IEEE Trans. Autom. Control, 2010

Rüffer, Sailer, Wirth
Comments on ``A multichannel IOS Small Gain Theorem for Systems With Multiple Time-Varying Communication Delays.''
IEEE Trans. Autom. Control, 2010

Rüffer, Kellett, Weller
Connection between cooperative positive systems and integral input-to-state stability of large-scale systems
Automatica J. IFAC, 2010

Rüffer, Dashkovskiy
Local ISS of large-scale interconnections and estimates for stability regions
Systems Control Lett., 2010

Monotone inequalities, dynamical systems, and paths in the positive orthant of Euclidean $n$-space
Positivity, 2010

Rüffer, Kellett, Dower, Weller
Belief Propagation as a Dynamical System: The Linear Case and Open Problems
IET Control Theory Appl., 2010

Dashkovskiy, Rüffer, Wirth
Small gain theorems for large scale systems and construction of ISS Lyapunov functions
SIAM J. Control Optim., 2010

Rüffer, Kellett, Weller
Integral input-to-state stability of interconnected iISS systems by means of a lower-dimensional comparison system
Proc. Joint 48th IEEE Conf. Decis. Control and 28th Chinese Contr. Conf., 2009

Rüffer, Kellett
Implementing the Belief Propagation Algorithm in MATLAB
Department of Electrical Engineering and Computer Science, University of Newcastle, Australia, 2008

Dashkovskiy, Rüffer, Wirth
Stability of interconnections of ISS systems
Proc. of the 8th SICE Annual Conference on Control Systems, 2008

Dashkovskiy, Rüffer, Wirth
Application of small gain type theorems in logistics of autonomous processes
Proc. 1st Int. Conference Dynamics in Logistics, 2008

Dashkovskiy, Rüffer, Wirth
Stability of autonomous vehicle formations using an ISS small-gain theorem for networks
PAMM, Special Issue: 79th Annual Meeting of the International Association of Applied Mathematics and Mechanics (GAMM), 2008

Dashkovskiy, Rüffer, Wirth
Applications of the general Lyapunov ISS small-gain theorem for networks
Proc. 47th IEEE Conf. Decis. Control, 2008

Dashkovskiy, Rüffer, Wirth
A Lyapunov ISS small-gain theorem for strongly connected networks
Proc. 7th IFAC Symp. Nonlinear Control Systems, 2007

Monotone dynamical systems, graphs, and stability of large-scale interconnected systems
Universität Bremen, Germany, 2007

Dashkovskiy, Rüffer, Wirth
Numerical verification of local input-to-state stability for large networks
Proc. 46th IEEE Conf. Decis. Control, 2007

Dashkovskiy, Rüffer, Wirth
An ISS small gain theorem for general networks
Math. Control Signals Syst., 2007

Rekersbrink, Rüffer, Wenning, Scholz-Reiter, Görg
Routing in dynamischen Netzen
Logistik Management, 2007

Scholz-Reiter, Wirth, Freitag, Dashkovskiy, Jagalski, Beer, Rüffer
Mathematical Models of Autonomous Logistic Processes
Understanding Autonomous Cooperation and Control in Logistics, 2007

Scholz-Reiter, Wirth, Freitag, Dashkovskiy, Jagalski, Beer, Rüffer
Some Remarks on the Stability of Production Networks
Operations Research Proceedings, 2006

Dashkovskiy, Rüffer, Wirth
Construction of ISS Lyapunov functions for networks
ZeTeM, Universität Bremen, Germany, 2006

Dashkovskiy, Rüffer, Wirth
Discrete time monotone systems: Criteria for global asymptotic stability and applications
Proc. 17th Int. Symp. Math. Th. Networks Systems (MTNS), 2006

Dashkovskiy, Rüffer, Wirth
On the construction of ISS Lyapunov functions for networks of ISS systems
Proc. 17th Int. Symp. Math. Th. Networks Systems (MTNS), 2006

Dashkovskiy, Rüffer, Wirth
A small-gain type stability criterion for large scale networks of ISS systems
Proc. Joint 44th IEEE Conf. Decis. Control and Europ. Contr. Conf., 2005

Multiple Stochastic Integrals and their relations
Dept. Mathematics, University of Warwick, UK, 2003