[2012]
Al-Areqi, S., Görges, D., Liu, S.: Robust Feedback Control and Scheduling of Networked Embedded Control Systems, 4th IFAC Conference on Analysis and Design of Hybrid Systems (ADHS’12), Eindhoven/Netherlands, 2012 (accepted)

Nagel, T., Elarfaoui, T., Liu, S.: Observer Based Leak Diagnosis for Pneumatic Systems in Commercial Vehicles, 2012 American Control Conference (ACC2012), Montréal/Canada, 2012 (accepted)

Reimann, S., Wu, W., Liu, S.: A Novel Control-Schedule Codesign Method for Embedded Control, 2012 American Control Conference (ACC2012), Montréal/Canada, 2012 (accepted)

Müller, P., Boucherit, R., Liu, S.: Smooth and Time-Optimal Trajectory Planning for Robot Manipulators, 2012 American Control Conference (ACC2012), Montréal/Canada, 2012 (accepted)

Simon, S., Liu, S.: A New Object-Oriented Fault Detection and Isolation Strategy Based on Bond-Graph Formalism, 2012 American Control Conference (ACC2012), Montréal/Canada, 2012 (accepted)

Nagel, T., Liu, S.: Lokalisierung von Leckagen im pneumatischen System von Nutzfahrzeugen, 2nd Commercial Vehicle Technology Symposium (CVT2012), Kaiserslautern/Germany, 2012 (accepted)

Simon, S., Liu, S.: Eine objektorientierte Methode zur Fehlererkennung und -¬isolation für komplexe Systeme, 2nd Commercial Vehicle Technology Symposium (CVT2012), Kaiserslautern/Germany, 2012 (accepted)

Thurner, L., Liu, S.: Frequency Stability Analysis of a Dynamic Wind Park in an Integrated Power Grid, International Conference on Renewable Energies and Power Quality (ICREPQ´12), Santiago de Compostela/Spain, 2012 (accepted)

[2011]
Al-Areqi, S., Görges, D., Liu, S.: Robust Control and Scheduling Codesign for Networked Embedded Control Systems, 50th IEEE Conference on Decision and Control (CDC’11), Orlando/USA, 2011

Liu, S., Simon, S.: Systematic Approach to Model-based Diagnosis Using Object-oriented Modeling Technique, 3rd Advanced Automotive Diagnostic Systems, Wiesbaden/Germany, 2011

Christmann, R., Weber, O., Liu, S.: Modelling and Flatness-Based Control of a R2S™ Turbocharger, 13th EAEC European Automotive Congress (EAEC2011), Valencia/Spain, 2011

Görges, D., Izák, M., Liu, S.: Optimal Control and Scheduling of Switched Systems, IEEE Transactions on Automatic Control (TAC), Vol. 56, No. 1, 2011

[2010]
Chen, L., Liu, S.: Fault diagnosis and fault-tolerant control for a nonlinear electro-hydraulic system, Conference on Control and Fault-Tolerant Systems (SysTol’10), Nice/France, 2010

Münch, P., Görges, D., Izák, M., Liu, S.: Periodic Current and Energy Control and Balancing of Modular Multilevel Converters, 35th Annual Conference of the IEEE Industrial Electronics Society (IECON2010), Phoenix/USA, 2010

Görges, D., Izák, M., Liu, S.: Optimale Regelung vernetzter Systeme mit unsicherer zeitvarianter Übertragungszeit, Workshop des GMA-Fachausschusses 1.40 „Theoretische Verfahren der Regelungstechnik“, Salzburg/Austria, 2010
Görges, D., Izák, M., Liu, S.: Optimal Control of Networked Control Systems with Uncertain Time-Varying Transmission Delay, 2nd IFAC Workshop on Distributed Estimation and Control in Networked Systems (NecSys’10), Annecy/France, 2010

Chen, L., Liu, S.: Fault diagnosis integrated fault-tolerant control for a nonlinear electro-hydraulic system, 2010 IEEE Multi-conference on Systems and Control (MSC2010), Yokohama/Japan, 2010

Münch, P., Liu, S., Ebner, G.: Multivariable Current Control of Modular Multilevel Converters with Disturbance Rejection and Harmonics Compensation, 2010 IEEE Multi-conference on Systems and Control (MSC2010), Yokohama/Japan, 2010

Prothmann, C., Kokes, M., Liu, S.: Deterioration Modeling Strategy for Pro-active Services of Commercial Vehicles, 2010 American Control Conference (ACC2010), Baltimore/USA, 2010

Simon, S., Görges, D., Izák, M., Liu, S.: Periodic Observer Design for Networked Embedded Control Systems, 2010 American Control Conference (ACC2010), Baltimore/USA, 2010

Zirkel, D., Liu, S., Wiedemann, G.: Ein neues Verfahren zum Entwurf von flachheitsbasierten Regelungen, Automatisierungstechnik at, Vol. 58 (2010), No. 7, pp. 371-381, DOI 10.1524/auto.2010.0855

Gong, S., Kokes, M., Liu, S.: Modellbildung für eine Funktionsdiagnose auf Basis objektorientierter Modellierung, 1st Commercial Vehicle Technology Symposium (CVT2010), Kaiserslautern/Germany, 2010

Prothmann, C., Kokes, M., Liu, S.: Ein Beitrag zur Schädigungsmodellierung von Komponenten eines Nutzfahrzeugs, 1st Commercial Vehicle Technology Symposium (CVT2010), Kaiserslautern/Germany, 2010

Izák, M., Görges, D., Liu, S.: Stabilization of Systems with Variable and Uncertain Sampling Period and Time Delay, Nonlinear Analysis: Hybrid Systems 4 (2010), pp. 291-305

[2009]
Görges, D., Izák, M., Liu, S.: Optimal Control and Scheduling of Networked Control Systems, 48th IEEE Conference on Decision and Control (CDC’09), Shanghai/China, 2009

Münch, P., Liu, S. Dommaschk, M.: Modeling and Current Control of Modular Multilevel Converters Considering Actuator and Sensor Delays, 35th Annual Conference of the IEEE Industrial Electronics Society (IECON2009), Porto/Portugal, 2009

Kokes, M., Liu, S., Flohr, G., von Querfurth, A.: Steigerung der Fixed First Visit Quote eines automatisierten Schaltgetriebes durch eine distributierte, modellbasierte Diagnose, 18. Aachener Kolloquium Fahrzeug- und Motorentechnik, Aachen/Germany, 2009

Wu, W., Liu, S.: An Approach to Reduce Complexity in Stability Analysis for Time-Varying Systems with Polytopic Uncertainties, 2009 IEEE Multi-conference on Systems and Control (MSC2009), St. Petersburg/Russia, 2009
Kokes, M., Liu, S., Flohr, G., von Querfurth, A.: Steigerung der Diagnosequalität komplexer, mechatronischer Fahrzeugsysteme durch modellbasierte Diagnose mit On-Board-Erfassung & Off-Board-Auswertung, 10. Internationale Fachtagung Nutzfahrzeuge, Neu-Ulm/Germany, 2009
Flohr, G., Kokes, M., von Querfurth, A., Liu, S.: Konzept für eine verteilte Funktionsdiagnose mit signalbasierter On-Board-Datenerfassung und modellbasierter Off-Board-Auswertung, Mechatronik 2009, Wiesloch/Germany, 2009
Kroneis, J., Müller, P., Liu, S.: Simplified Modelling and Parameter Identification of Parallel Robots with Redundancies, Journals of Systems and Control Engineering, Vol. 223, No. I1, February 2009

[2008]
Görges, D., Kroneis, J., Liu, S.: Active Vibration Control of Storage and Retrieval Machines, 32nd ASME Annual Mechanisms and Robotics Conference (IDETC/MECH’08), New York/USA, 2008

Kroneis, J., Müller, P., Liu, S.: Reduced Order Modeling and Direct Parameter Identification for a Complex Parallel Robot, 32nd ASME Annual Mechanisms and Robotics Conference (IDETC/MECH’08), New York/USA, 2008

Görges, D., Izák, M., Liu, S.: Optimales Regler-Scheduler-Codesign für eingebettete Regelungssysteme, Workshop des GMA-Fachausschusses 1.40 „Theoretische Verfahren der Regelungstechnik“, Salzburg/Austria, 2008

Izák, M., Görges, D., Liu, S.: Stability and Control of Systems with Uncertain Time-Varying Sampling Period and Time Delay, 17th IFAC World Congress (IFAC’08), Seoul/South Korea, 2008

Kroneis, J., Müller, P., Liu, S.: Dynamic Modeling and Identification of a Complex-Structured Parallel Robot, 17th IFAC World Congress (IFAC’08), Seoul/South Korea, 2008

Stegmann, N., Liu, S.: An Approach to Unknown Input Observation for Non-Input-Affine Nonlinear MIMO Systems, 17th IFAC World Congress (IFAC’08), Seoul/South Korea, 2008

Zirkel, D., Wiedemann, G.; Liu, S.: Dynamischer Betrieb einer Brennstoffzelle mittels flachheitsbasierter Vorsteuerung und Mehrgrößenregler, 4. Fachtagung Steuerung und Regelung von Fahrzeugen und Motoren (AUTOREG2008), Baden-Baden/Germany, 2008

[2007]
Görges, D., Izák, M., Liu, S.: Optimal Control of Systems with Resource Constraints, 46th IEEE Conference on Decision and Control (CDC’07), New Orleans/USA, 2007

Stegmann, N., Liu, S.: Eingangsgrößenrekonstruktion zur Trajektorienfolge mit elementarer Sensorik, 20. Fachgespräch Autonome Mobile Systeme (AMS 2007), Kaiserslautern/Germany, 2007

Hengen, H., Izák, M., Liu, S.: Ein Einzelworterkennungssystem mit GUI-basierter Wortschatzumschaltung für industrielle Mensch-Maschine-Schnittstellen, atp Automatisierungstechnische Praxis, Vol. 49, Heft 9, S. 100 – 105, 2007

Izák, M., Görges, D., Liu, S.: On Stability and Control of Systems with Time-Varying Sampling Period and Time Delay, 7th IFAC Symposium on Nonlinear Control Systems (NOLCOS2007), Pretoria/South Africa, 2007

Kroneis, J., Liu, S.: Flexible Body Modeling and Vibration Damping for a Planar Parallel Robot Using Input Shaping, 2007 IEEE/ASME International Conference on Advanced Intelligent Mechatronics (AIM2007), Zurich/Switzerland, 2007

Kroneis, J., Liu, S.: Hybrid Approach to Modeling a Flexible Parallel Robot for Vibration Damping, 31st ASME Annual Mechanisms and Robotics Conference (IDETC/MECH’07), Las Vegas/USA, 2007

Kroneis, J., Gastauer, T., Liu, S., Sauer, B.: Flexible Body Modeling and Vibration Analysis of a Parallel Robot with Numerical and Analytical Methods for the Purpose of Active Vibration Damping, 52. Internationales Wissenschaftliches Kolloquium (52nd IWK), Illmenau/Germany, 2007

Kroneis, J., Gastauer, T., Liu, S., Sauer, B.: Evaluierung einer Trajektorienplanungsstrategie höherer Ordnung für eine Parallelkinematik mit drei Freiheitsgraden unter Verwendung einer Co-Simulation zwischen MSC.ADAMS und MATLAB/Simulink, Kongress für Simulation im Produktentstehungsprozess (SimPEP), Würzburg/Germany, 2007

Wagner, F., Münch, P., Liu, S., Frey, G.: Development Process for Dependable High-Performance Controllers Using Petri Nets and FPGA Technology, 1st IFAC Workshop on Dependable Control of Discrete Systems (DCDS'07), Paris/France, 2007

Machleidt, K., Kroneis, J., Liu, S.: Stabilization of the Furuta Pendulum Using a Nonlinear Control Law Based on the Method of Controlled Lagrangians, 2007 IEEE International Symposium on Industrial Electronics (ISIE'07), Vigo/Spain, 2007

[2006]
Braune, S., Liu, S., Mercorelli, P.: Design and Control of an Electromagnetic Valve Actuator, 2006 IEEE International Conference on Control Applications (CCA'06), Munich/Germany, 2006

[2005]
Kubasiak, N., Mercorelli, P., Liu, S.: MPC Control for Transistor Pulse Modulation by Feeding Electromagnetic Valve Actuator, 2005 Joint Conference on Decision and Control and European Control Conference (CDC-ECC'05), Seville/Spain, 2005

Braune, S., Liu, S.: A Novel Linear Actuator for Variable Valve Actuation, IEEE International Conference on Industrial Technology (IEEE ICIT’05), Hongkong/China, 2005

Braune, S., Liu, S.: Design of a Novel Moving Magnet Linear Motor for Use as a Valve Actuator, 31st Annual Conference of IEEE Industrial Electronics Society (IECON’05), Raleigh/USA, 2005

Chen, L., Mercorelli, P., Liu, S.: Hybrid Kalman Estimator for Detecting Repetitive Disturbance in Mechatronic Application, 24th American Control Conference (ACC'05), Portland/USA, 2005

[2004]
Chen, L., Mercorelli, P., Liu, S.: A Two-Stage Kalman Estimator for Motion Control using Model Predictive Strategy, 8th International Conference on Control, Automation, Robotics and Vision (ICARCV'04), Kunming/China, 2004

Muamer, H., Chen, L., Liu, S.: Design and Simulation of a Moving Coil Linear Actuator for Automotive Applications, IEEE International Conference on Industrial Technology (IEEE ICIT'04), Hammamet/Tunesia, 2004

Braune, S., Liu, S.: Design of a Novel Permanent Magnet Linear Actuator for Short-Stroke and High-Dynamic Motions, 11th International Power Electronics and Motion Control Conference (EPE-PEMC'04), Riga/Latvia, 2004

Sallier, R., Liu, S., Reimann, B., Lehmann, K.: Mechatronic System Modeling by Hybrid Analytical and Finite-Element-Method, 11th International Power Electronics and Motion Control Conference (EPE-PEMC'04), Riga/Latvia, 2004

Fischer, P.-W., Liu, S.: Controlled Power Grid Coupling of a Three Phase Solar Inverter, 11th International Power Electronics and Motion Control Conference (EPE-PEMC'04), Riga/Latvia, 2004

Liu, S., Braune, S., Sallier, R.: Design and Modelling of a Novel Linear Electromagnetic Actuator, 3rd IFAC Symposium on Mechatronic Systems (MECHATRNICS'04), Sydney/Australia, 2004

Muamer, H., Reimann, B., Diab, M., Liu, S.: Design of a Moving Coil Linear Actuator for High-Dynamic Strong-Force Applications, 16th International Conference on Electrical Machines (ICEM'04), Cracow/Poland, 2004

Mercorelli, P., Kubasiak, N., Liu, S.: Multilevel Bridge Governor by Using Model Predictive Control in Wavelet Packets for Tracking Trajectories, 2004 IEEE International Conference on Robotics and Automation (ICRA'04), New Orleans/USA, 2004

Sallier, R., Liu, S., Reimann, B., Lehmann, K.: Modelling of Electromagnetic Actuators Using Hybrid Analytical and Finite-Element-Method, 2004 IEEE International Symposium on Industrial Electronics (ISIE'04), Ajaccio/France, 2004

Mercorelli, P., Kubasiak, N., Liu, S.: Model Predictive Control of an Electromagnetic Actuator Fed by Multilevel PWM Inverter, 2004 IEEE International Symposium on Industrial Electronics (ISIE'04), Ajaccio/France, 2004

[2003]
Mercorelli, P., Lehmann, K., Liu, S.: Robust Flatness Based Control of an Electromagnetic Actuator with Adaptive PID Controller, 42nd IEEE Conference on Decision and Control (CDC'03), Maui/USA, 2003, S. 3790 - 3795

Mercorelli, P., Lehmann, K., Liu, S., Muamer, H., Reimann, B.: Robust Control of an Electromagnetic Linear Actuator Using Flatness Property and Systems Inversion, European Control Conference 2003 (ECC'03), Cambridge/UK, 2003

Liu, S., Mercorelli, P., Lehmann, K.: Robust Control of a Permanent Magnet Linear Motor in the Presence of Large Disturbances, IEEE Conference on Control Applications (CCA’03), Istanbul/Turkey, 2003, S. 1301 - 1306

Zia, O., Liu, S.: Faculty Exchange in Control Education, One Aspect of International Co-operation, 6th IFAC Symposium on Advances in Control Education (ACE'03), Oulu/Finland, 2003

Mercorelli, P., Lehmann, K., Liu, S.: On Robustness Properties in Permanent Magnet Machine Control by Using Decoupling Controller and Constrained Observability, 4th IFAC Workshop on Robust Control Design (ROCOND’03), Milano/Italy, 2003

[2002]
Wöstenkühler, G., Liu, S., Li, T.: Adapted Morlet Wavelet Analysis for the Rotation Speed Detection of Series-wound Motors, Journal of Systems Science, Vol. 28, No. 3, 2002, S. 85 - 93

Mercorelli, P., Liu, S., Braune, S.: A Geometric Approach by Using Switching and Flatness Based Control in Electromechanical Actuators for Linear Motion, 6th International Conference on Mechatronics Technology (ICMT'02), Kitakyushu/Japan, 2002, S. 64 - 69

Liu, S.: An On-line Reference-Trajectory Generator for Smooth Motion of Impulse-controlled Industrial Manipulators, 7th International Workshop on Advanced Motion Control (AMC'02), Maribor/Slovenia, 2002, S. 365 - 370

[2001]
Liu, S., Li, T., Wöstenkühler, G.: Detection and Prediction of Transformer Inrush Signal in Railway Applications, 14th International Conference on Systems Science (ICSS'01), Wroclaw/Poland, 2001, S. 168 - 175

Wöstenkühler, G., Liu, S., Li, T.: Rotation Speed Determination for Series-wound Motors Using Wavelets, 14th International Conference on Systems Science (ICSS'01), Wroclaw/Poland, 2001, S. 121 - 128

[2000]
Liu, S.: Signal Detection and Prediction Using Estimation Techniques, International Workshop on Electrical Systems Compatibility (ESCARV), Brussels/Belgium, 2000

[1998]
Liu, S.: An Adaptive Kalman Filter for Dynamic Estimation of Harmonic Signals, International IEEE Conference on Harmonics and Quality of Power (ICHQP'98), Athens/Greek, 1998, S. 636 - 640

[1996]
Liu, S.: Dynamische On-line-Schätzung von Kenngrößen quisi-stationärer Signale, Daimler-Benz FT Workshop Neue Verfahren der Regelungstechnik, Stuttgart/Germany, 1996

[1995]
Böcker, J., Liu, S., Endrikat, C.: A Systematic Approach to State Feedback Controller Design for DC/DC Line-side Converters, 6th European Conference on Power Electronics and Applications (EPE‘95), Sevilla/Spanien, 1995

[1993]
Liu, S.: Beitrag zur Anwendung stochastischer Methoden zur Parameter- und Zustandsschätzung bei Synchronmaschinen, Fortschritt-Berichte VDI, Reihe 8: Meß-, Steuerungs- und Regelungstechnik, Nr. 333, VDI Verlag, 1993

[1991]
Liu, S., Stiebler, M.: Identification of Synchronous Machine Parameters at Standstill by Means of Stochastic Estimation Methods, International Conference on Evolution and Modern Aspects of Synchronous Machines (SM100), Zürich/Schweiz, 1991

Liu, S.: Bestimmung der Parameter einer Synchronmaschine mit Hilfe der stochastischen Systemidentifikation im Stillstand, DFG-Kolloquium „Neue Systeme der elektromechanischen Energiewandlung“, Braunschweig, 1991

[1990]
Liu, S., Stiebler, M.: State Estimation of a Synchronous Machine for Inverter Drives, 25th Universities Power Engineering Conference (UPEC‘90), Aberdeen/GB, 1990

Liu, S., Stiebler, M.: State Estimation of a PWM Inverter Fed Synchronous Motor by using Stochastic Filtering Techniques, 9th International Conference on Electrical Machines (ICEM‘90), Cambridge/USA, 1990

[1989]
Liu, S., Stiebler, M.: A Continuous-discrete Time State Estimator for a Synchronous Motor Fed by PWM Inverter, 3rd European Conference on Power Electronics and Applications (EPE‘89), Aachen/Germany, 1989