Page 10 - ASME DSCC 2015 Program

Workshops

EnERGY HARVESTInG SYSTEMS STABIlITY AnAlYSIS of lTI SYSTEMS WITH TIME DElAYS
Tuesday, october 27, 2015 Tuesday, october 27, 2015
Elijah Pierce B 8:00am–12:00pm Elijah Pierce B 1:00pm–5:00pm

Speakers Speaker
Cornel Sultan and lei Zuo Rifat Sipahi
Virginia Tech Northeastern University
Abstract Abstract
For over six decades, researchers in many fields investigated the
On one hand, exploiting nonconventional, clean energy resources is a crucial influence of time delays on the behavior of dynamical systems. On Linear
element of sustainability. On another hand, recent developments in materials, Time Invariant (LTI) systems, there has been tremendous progress from
power electronics, signal processing, dynamics, and control, as well as stability and control design points of views. Specifically, main questions in
computational capabilities and system design, enable clean energy these efforts include: (i) what is the largest delay that a closed loop system
harvesting systems with increased efficiency and reduced control. Following can withstand without losing stability; (ii) for a given delay in the closed
these recent developments, this workshop presents an overview of the loop system how should the controller gains be selected to prevent
critical challenges, fundamental principles and recent advances related to instability; and (iii) how could closed loop system eigenvalues be
energy harvesting from mechanical vibrations and hydrokinetic sources. computed in order to assess and approximate closed loop performance.
Biography This workshop will focus on continuous time LTI systems from an
eigenvalue-based approach to cover materials for the audience to be able
Cornel Sultan Biographical Sketch: Dr. Cornel Sultan received a Ph.D. in
to answer questions (i)-(iii), and develop their own approaches to analyze
Aeronautics and Astronautics from Purdue University in 1999. Between
similar classes of systems. The lecture will also provide sufficient and
1999-2007 he was affiliated with a start-up company, Tensegra Inc. (1999-2001),
concise background starting from 1960s to date, will discuss the
Harvard Medical School (2001-2003), Scientific Systems Company Inc. (SSCI;
challenges and limitations, and demonstrate how to solve benchmark
2001- 2004), and United Technologies Research Center (UTRC; 2004-2007).
problems step by step using Maple and Matlab software.
At Tensegra and Harvard Medical School his work was focused on structural
modeling and design for artificial spinal discs and the cytoskeleton of living Biography
cells. At SSCI and UTRC he worked primarily on projects related to formation
flying spacecraft and helicopter modeling and control such as swashplateless Sipahi received his BS from Technical University of Istanbul in 2000, MS
and active rotor helicopters, heavy lift helicopters, formation flying helicopters, and PhD respectively in 2002 and 2005 from University of Connecticut,
fly-by-wire design. He joined Virginia Tech’s Aerospace and Ocean Engineering all in mechanical engineering. Awarded with a Chateuabriand scholarship
Department in 2007 where he is an Associate Professor. His current research by the French government, he has been a postdoctoral fellow in France at
interests are in dynamics, control, and design, including applications in energy Universite de Technologie de Compiegne, HeuDiaSyC Labs (CNRS) during
harvesting, tensegrity structures and membranes, helicopters and high speed 2005-2006. In August 2006, he joined the Department of Mechanical and
aircraft, networks and coordination. He is a core Faculty of Virginia Tech’s NSF Industrial Engineering at Northeastern University, Boston, where he is
I/UCRC Center for Energy Harvesting Materials Systems (CEHMS). In 2010 he currently an associate professor.
received a NSF CAREER Award.
Sipahi is the recipient of a 2011 DARPA Young Faculty Award, 2011 College
Lei Zuo completed his Ph.D. in mechanical engineering and two M.S. degrees of Engineering Martin W. Essigmann Outstanding Teaching Award, and
in both mechanical engineering and electrical engineering from MIT in 2005 2014 College of Engineering Faculty Fellow Award. He has also been
and 2002. He joined in the department of mechanical engineering of Virginia actively involved in ASME Dynamic Systems and Control (DSC) Division,
Tech as an Associate Professor with tenure in 2014. Prior to that he was an taking editorial duties in division newsletter and recently in division-led
Assistant and Associate Professor in the State University of New York at Stony ASME DSC Magazine. Sipahi has been an ASME Fellow since 2014.
Brook from 2008 to 2014, and worked in industry from 2004 to 2008. Lei Zuo’s
research interests include energy harvesting, mechatronic systems, vibration Sipahi’s work has been extensively published in peer-reviewed journals
control, smart structures, thermoelectrics, and advanced sensors. His energy and conference proceedings, and presented at various meetings. The
harvesting research has been supported by NSF, DOE, DOT, ONR, EPA, three book volumes he co-edited under Springer (2009, 2012, and 2013)
NYSERDA, CRCF, and industry. He has authored/co-authored over 120 papers attracted over 70,000 chapter downloads to date. He is one of the authors
in journals and conferences and holds several US patents. Lei Zuo is a recipient of the article “Stability and Stabilization of Systems with Time Delay,
of the 2015 ASME Thar Energy Design Award, 2014 SAE Ralph R. Teetor Limitations and Opportunities” published in IEEE Control System Magazine
Educational Award, 2014 ASME Best Paper Award in Structures and Structural in 2011. He has been actively involved as associate editor, program
Dynamics, 2012 Best Application of Energy Harvesting, 2011 R&D 100 Award, committee member, chair/co-chair in many conferences organized by
and 2010 Best Technology Development of Energy Harvesting. He serves as a ASME, IEEE, and IFAC, including the 2012 IFAC Workshop on Time Delay
technical editor of IEEE-ASME Transactions on Mechatronics and an associated Systems, which he co-organized at Northeastern University, and of which
editor of ASME Journal of Vibration and Acoustics. He is the Associate Director he was the Program Editor. www.coe.neu.edu/~rifat
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of Virginia Tech’s NSF I/UCRC Center for Energy Harvesting Materials Systems
(CEHMS).