CSMcoverStability and Stabilization of Systems with Time Delay, Limitations and Opportunities, IEEE Control Systems Magazine
Stability Analysis of LTI Multiple Time Delay Systems
Cluster Treatment of Characteristic Equations


Research Team



Rifat Sipahi, PhD


Photo: Courtesy of Mary Knox Merrill/Northeastern University


Office: 321 Snell Engineering Center.

Phone: (617) 373 6011.

Email: rifat AT coe DOT neu DOT edu

Professional Services:

  • ASME Dynamic Systems and Control Division
    • Newsletter Associate Editor 2006-2008
    • Newsletter Editor 2008-2011
    • DSC Magazine News Editor 2013 - current
    • Vice-chair (2011-2014) and chair (2014 - current) of Technical Committee on Vibration Control of Smart Structures
  • Review service since 2002 multiple times for 14 different conferences and over 40 different journals
  • co-creator with Prof. Niculescu the e-delay systems email list. Click here to subscribe. Currently we have about 1,500 members on the list
  • co-edited three volumes with Springer (see News below) each with about 400 pages
  • co-organized and the Editor/Program Chair of 2012 IFAC Workshop on Time Delay Systems
  • Associate Editor roles for ACC (2010, 2012-2015), ASME DSCC (2011-2015), ECC (2014-2016), IFAC TDS (2009, 2010, 2013, 2015, 2016), ASME IDETC (2009, 2011, 2015)
  • co-organized three educational Workshops on Time Delay Systems at major controls conferences (see below)
  • Program Committee Member, ACC 2010, ASME DSCC 2009, 2011 2015,, IEEE CCA MSC 2016
  • co-organized several invited sessions on time delay systems at major control conferences since 2006
  • chair/co-chair of sessions on time delay systems at major controls conferences under ASME, IEEE, IFAC.



  • 2013 European Control Conference, Zurich, Switzerland
  • 2013 IEEE Conference On Decision And Control, Florence, Italy
  • 2014 European Control Conference, Strasbourg, France
  • 2015 ASME Dynamic Systems and Control Confernce, USA

Lecturers: Fatihcan M. Atay (GERMANY), Dimitri Breda (ITALY), Wim Michiels (BELGIUM), Silviu-Iulian Niculescu (FRANCE), Hitay Ozbay (TURKEY), Rifat Sipahi (USA)


Active research & engineering education topics
  • Novel results in LTI systems with multiple delays, both in delay-dependent and delay-independent stability (since 2001)

  • Novel control design techniques to enhance effectiveness of man-machine systems (since 2010)

  • Engineering solutions in ways to suppress hand tremors in daily tasks (since 2010)

  • Mechatronics based portable Braille writing device (since 2009)

  • Development of new hands-on mechatronics curriculum covering energy systems, bioengineering, biomedical devices, and sustainability (since 2011)

  • Responsible Eigenvalue concepts in networked systems in presence of delays. Design of network topologies that can withstand larger delays without losing stability (since 2006)


Mailing Address: 334 Snell Engineering Center, 360 Huntington Avenue, Northeastern University, Boston, MA 02115