Faculty Profile

Srinivasa M Salapaka

Mechanical Science and Engineering
Srinivasa M Salapaka
Srinivasa M Salapaka
362C Mechanical Engineering Bldg
1206 W. Green
Urbana Illinois 61801
(217) 244-4172

Primary Research Area

  • Dynamics & Controls


  • Ph.D. Mech. Eng. University of California, Santa Barbara 2002
  • M.S. Mech. Eng. University of California, Santa Barbara 1997
  • B.Tech Mech. Eng. Indian Institute of Technology 1995


Srinivasa M. Salapaka received the B.Tech. degree in Mechanical Engineering from Indian Institute of Technology at Chennai in 1995, the M.S. and the Ph.D. degrees in Mechanical Engineering from the University of California at Santa Barbara, U.S.A in 1997 and 2002, respectively. During 2002-2004, he was a postdoctoral associate in the Laboratory for Information and Decision Systems, Massachusetts Institute of Technology, Cambridge, USA. Since January 2004, he has been a Faculty Member in Mechanical Science and Engineering at the University of Illinois, Urbana-Champaign. He got the NSF CAREER award in the year 2005. He is an ASME fellow since 2015. His areas of current research interest include controls for nano/bio technology, combinatorial optimization, Brownian ratchets, dynamic-systems analysis of numerical algorithms, and control of power systems.

Academic Positions

  • Associate Professor, Department of Mechanical Science and Engineering, UIUC, 2010-2017
  • Department Affiliate (0%), Department of Aerospace Engineering, UIUC, October 16, 2008-date
  • Member of Coordinated Science Laboratory (0%), August 16, 2007-date
  • Department Affiliate (0%), Department of Industrial and Enterprise Systems Engineering, UIUC, Aug 16, 2006-date
  • Assistant Professor, Department of Mechanical Science and Engineering, UIUC, Jan. 1, 2004-2010
  • Postdoctoral Associate, Massachusetts Institute of Technology, Summer 2002 - Fall 2003

For more information

Other Professional Employment

  • Research/Teaching Assistant, University of California, Santa Barbara, Spring 1995 - 2002

Research Statement

Professor Salapaka's research can be broadly divided into three areas - (I) one area is nano-biotechnology, where emphasis is on developing frameworks for modeling and analyzing systems at nanoscales, and, developing new instrumentation and methodologies for nano-investigation and nano-manipulation. In particular, his group has made significant contributions in modeling, analysis, and control, thereby enhancing and engendering new capabilities for precision positioning and scanning probe microscopy (SPM). He is leveraging the resulting control systems and instrumentation expertise toward scientific studies, especially studying intracellular protein (e.g. Kinesin and Dynein) motion. (II) Another broad area of his research is classification, clustering, and aggregation of large data sets, where he is developing frameworks for designing algorithms to efficiently solve the underlying combinatorial optimization problems. In particular, his research group is making significant contributions to drug-selection problems in combinatorial drug discovery, dynamic coverage problems in sensor networks, and coverage-cum-routing problems in flexible communication and transportation networks, dynamic network-reduction problems in neuroscience, and model reduction of large parametric models, aggregation of weighted directed graphs and Markov chains. Related optimization problems have non convex cost functions that are riddled with multiple local minima, and are proved to be computationally complex (NP-hard). (III) More recently he is working on power systems and control , where he is applying modern systems techniques for developing control of power-grid/ power electronics technologies. This research aims in comprehensive technology for developing and implementing smart-grid technologies capable of harnessing much more power from renewable (though) uncertain power sources while guaranteeing grid stability and satisfying economic power sharing constraints.

Research Areas

  • Computation and Applied Math
  • Dynamics & Controls
  • Energy
  • Health and Bio
  • Security and Defense
  • Transportation

Selected Articles in Journals

  • Sarwar,A, P.G. Voulgaris, S. Salapaka, ￿Identification of Spatiotemporally Invariant Systems for Control Adaptation,￿ Automatica 48, 2079-2092, 2012
  • Kale, N., and S. Salapaka, ￿Maximum Entropy Principle based Algorithm for Simultaneous Resource Location and Multi-hop Routing in Multi-agent Networks,￿ IEEE Transactions on Mobile Computing, vol. 11, no. 4, pp. 591-602, Apr. 2012.
  • Sharma, P., S. Salapaka, and C. Beck, "Entropy-based Framework for Dynamic Coverage and Clustering Problems," IEEE Transactions on Automatic Control, Vol 57, No. 1, 135-150, January 2012.
  • Koo B., X. Zhang, J. Dong, S. Salapaka, and P. Ferreira, ￿A 2 Degree-of-Freedom SOI-MEMS Translation Stage with Closed Loop Positioning￿, IEEE/ASME Journal of Microelectromechanical Systems, Vol. 21, no. 1, 13-22, February 2012
  • Sarwar, A., P. G. Voulgaris, and S. Salapaka, "On l∞ Stability and Performance of Spatiotemporally Varying Systems," Int. J. Robust. Nonlinear Control, Vol 21, 957-973, 2011.
  • Sarwar, A., P. G. Voulgaris, and S. Salapaka, "On Control Design and Robustness Analysis for High-Density Microcantilever Arrays," Journal of Vibration and Control, 17(8) 1195-1210, July 2011
  • Lee,C. and S. Salapaka, "Fast Imaging with Alternative Signal for Dynamic Atomic Force Microscopy," Applied Physics Letters, 97, 133101, September 2010.
  • Hur,P., B. A. Duiser, S. Salapaka, and E. T. Hsiao-Wecksler,￿Measuring Robustness of the Postural Control System to an Impulsive Perturbation,￿ IEEE Transactions on Neural Systems & Rehabilitation Engineering,Vol. 18 No. 14, 461-467, August 2010
  • Helfrich, B. E., C. Lee, D. A. Bristow, X. H. Xiao, J. Dong, A. G. Alleyne, S. M. Salapaka, and P. M. Ferreira, ￿Combined H∞-Feedback Control and Iterative Learning Control Design with Application to Nanopositioning Systems,￿ IEEE Transactions on Control Systems Technology, 18(2), 336-351, 2010.
  • Sarwar, A., P. G. Voulgaris, and S. Salapaka, ￿On l∞ and l2 Robutness of Spatially Invariant Systems,￿ International Journal of Robust and Nonlinear Control, 20(6), 607￿622, April 2010
  • Lee, C. and S. Salapaka, ￿Fast Robust Nanopositioning - A Linear Matrix Inequalities Based Optimal Control Approach,￿ IEEE/ASME Transactions on Mechatronics, 14:4, 414-422, August 2009.
  • Lee, C. and S. Salapaka, ￿Robust Broadband Nanopositioning: Fundamental Tradeoffs, Analysis and Design in Two Degree of Freedom Control Framework,￿ Nanotechnology, 20, 035501, 2009.
  • Salapaka, S. and M. V. Salapaka, ￿Scanning Probe Microscopy ￿ A Controls Systems Perspective on Nanointerrogation,￿IEEE Control Systems Magazine, 65-83, April 2008.
  • Dong, J., S. Salapaka, and P. Ferreira, ￿Robust Control of a Parallel Kinematic Nano-Positioner,￿ ASME Journal of Dynamic Systems, Measurement and Control, Vol 130, 041007(1-15), July 2008.
  • Sharma, P., S. Salapaka, and C. Beck, ￿A Scalable Approach to Combinatorial Library Design for Drug Discovery,￿ Journal of Chemical Information and Modeling, 48, 27-41, 2008.
  • Sarma, S., M. A. Dahleh, and S. Salapaka, ￿On Time-Varying Bit-Allocation Maintaining Stability and Performance: A Convex Parameterization,￿ IEEE Transactions on Automatic Control, 53:5,1147-1159,2008.
  • Bristow, D., J. Dong, A. Alleyne, P. Ferreia, and S. Salapaka, ￿High Bandwidth Control of Precision Motion Instrumentation,￿ Review of Scientific Instruments, 79, 103704, 2008.
  • Shegaonkar, A. C. and S. M. Salapaka, ￿Making High Resolution Positioning Independent of Scan Rates: a Feedback Approach,￿ Applied Physics Letters, 91:20, Art No. 203513, 2007.
  • Shegaonkar A. C. and S. M. Salapaka, ￿Feedback Based Simulations Correction of Imaging Artifacts due to Geometrical and Mechanical Cross-talk and Tip-Sample Stick in Atomic Force Microscopy,￿ Review of Scientific Instruments, 78:10, Art No. 103706, 2007.
  • Salapaka, S. and A. Peirce, ￿Analysis of a Novel Preconditioner for a Class of p-level Lower Rank Extracted Systems,￿ Numerical Linear Algebra with Applications, 12, 437-472, 2006.
  • Salapaka, S., T. De, and A. Sebastian, ￿A Robust Control Based Solution to the Sample-profile Estimation Problem in Fast Atomic Force Microscopy,￿ International Journal for Robust and Nonlinear Control, 15:16, 821-837, Nov. 2005.
  • Sebastian, A. and S. Salapaka, ￿Design Methodologies for Robust Nano-positioning,￿ IEEE Transactions on Control Systems Technology, 13:6, 868-876, Nov. 2005.
  • Salapaka, S., T. De, and A. Sebastian, ￿Sample-profile Estimate for Fast Atomic Force Microscopy,￿ Applied Physics Letters, 87:053112, 1-3, August 2005. This paper was also selected for the August 8, 2005 issue of Virtual Journal of Nanoscale Science and Technology at http://www.vjnano.org.
  • Salapaka, S., A. Peirce, and M. Dahleh, ￿Analysis of a Circulant Based Preconditioner for a Class of Lower Rank Extracted Systems,￿ Numerical Linear Algebra with Applications, 12, 9-32, 2005.
  • Salapaka, S., A. Sebastian, J. P. Cleveland, and M. V. Salapaka, ￿High Bandwidth Nano-Positioner: A Robust Control Approach,￿ Review of Scientific Instruments, 73:9, 3232-3241, 2002 (This paper was selected for the September 2, 2002 issue of Virtual Journal of Nanoscale Science and Technology at http://www.vjnano.org).
  • Salapaka, S., M. Dahleh, and I. Mezic, ￿On the Dynamics of a Harmonic Oscillator Undergoing Impacts with a Vibrating Platform,￿ Nonlinear Dynamics, 24, 333-358, 2001.

Professional Societies

  • Member, SAE, 2012-date
  • Member, ASME International, 2004-date
  • Member, IEEE, 2003-date

Teaching Honors

  • List of Teachers Ranked Excellent by their Students, Spring 2012
  • List of Teachers Ranked Excellent by their Students, Fall 2011
  • List of Teachers Ranked Excellent by their Students, Spring 2010
  • List of Teachers Ranked Excellent by their Students, Fall 2007

Research Honors

  • ￿5th most downloaded article in June and August 2008￿ for the article `` Robust Control of a Parallel- Kinematic Nanopositioner,￿ as announced by ASME Journal of Dynamic Systems, Measurement, and Control, 2008.
  • Best Presentation in Session Award, ￿Entropy Based Algorithm for Combinatorial Optimization Problems with Mobile Sites and Resources,￿ in the American Control Conference, Seattle, WA, June 11-13, 2008.