Faculty Directory

Krishnaprasad, P. S.

Krishnaprasad, P. S.

Professor
Electrical and Computer Engineering
The Institute for Systems Research
Maryland Robotics Center
2233 A.V. Williams Bldg.
Website(s):

P. S. Krishnaprasad received his Ph.D. degree from Harvard University in 1977. He was on the faculty of the Systems Engineering Department at Case Western Reserve University from 1977 to 1980. He has been with the University of Maryland since August 1980, where he has held the position of Professor of Electrical Engineering since 1987, and a joint appointment with the Institute for Systems Research since 1988. He is also a faculty member of the Program in Applied Mathematics and Statistics, and Scientific Computation, and the Program in Neuroscience and Cognitive Science. Since 1987 he has led the Intelligent Servosystems Laboratory.

Krishnaprasad has held short and long term visiting positions with Erasmus University (Rotterdam); the Department of Mathematics, University of California, Berkeley; the University of Groningen (the Netherlands); the California Institute of Technology; the Mathematical Sciences Institute at Cornell University; and the Mechanical and Aerospace Engineering Department at Princeton University.

Krishnaprasad's research interests lie in the broad area of geometric control theory and its applications. His past contributions include geometry of parametrization problems in linear systems, the Lie algebraic foundations of certain nonlinear filtering problems pertaining to system identification, the Lie theory and stability of interconnected mechanical systems (e.g., spacecraft with elastic attachments, spinning rotors, and fluid-filled cavities), and symmetry principles in nonlinear control theory. He has also investigated mathematical problems in the kinematics and control of robot manipulators, the real-time control of flexible robot arms with end-point sensing, tactile perception, and the development of symbolic algebraic tools for design and control. In the last several years, his interests have drawn him to: problems of modeling, design, motion planning and control, arising in mobile robotics (legged and wheeled vehicles, autonomous underwater vehicles and autonomous aircraft); geometric methods in nonlinear dynamics; wavelet analysis for signals and systems; intelligent control architectures, in part inspired by biological paradigms such as central patterns generators and neural networks; the technology and theory of smart materials such as piezo-electric and magnetostrictive materials for use in actuation and sensing; problems of integration of actuators and sensors in control networks; and modeling, simulation, monitoring and control in semiconductor manufacturing processes, such as rapid thermal chemical vapor deposition.

A central interest in geometric control theory, geometric mechanics, Lie groups, and distributed parameter systems, guides the technical approaches taken to attack problems in the above areas. Additionally, some of this work is also linked to the experimental efforts in the Intelligent Servosystems Laboratory.

P. S. Krishnaprasad was elected a Fellow of the IEEE in 1990 for his contributions to geometric and nonlinear control and engineering education. He was appointed a 1998-2000 Distinguished Faculty Research Fellow of the University of Maryland. He was a member of a team recognized by American Helicopter Society's Grover E. Bell Award (2002) (for work on smart structures during 1991-96) bestowed on the Alfred Gessow Rotorcraft Research Center. He was the Munich Mathematical Colloquium Lecturer (October 24, 2006). He is the recipient of the 2007 Hendrik W. Bode Lecture Prize of the IEEE Control Systems Society, for fundamental contributions to the theory of control of natural and synthetic physical systems.

Honors and awards

    •    IEEE Control Systems Society Hendrik W. Bode Prize (2007)
    •    Distinguished Faculty Research Fellow (1998-2000)
    •    Outstanding Systems Engineering Faculty Award, Institute for Systems Research, University of Maryland (1990-1991)
    •    IEEE Fellow (1990)

 

 

Geometric control theory and filtering theory; control of infinite dimensional systems; system identification and model reduction; geometric mechanics; dynamics of nonholonomic systems with symmetries; dynamical systems on Lie groups and optimal trajectory generation

Control problems arising in complex multi-body systems (e.g. spacecraft with deformable elastic attachments and fluid filled containers, underwater vehicles)

Problems of modeling, design, motion planning and control, arising in mobile robotics and robotic manipulation; sensors and actuators for robotic end-effectors; motion control for nonholonomic robots; under-actuated autonomous robotic vehicles; GPS-aided navigation of mobile robots

Time-frequency methods for the analysis of signals and systems (e.g. wavelet basis representations); exploitation of auditory-physiological insights in time-frequency analysis of acoustic data; independent component analysis;

Intelligent control architectures for complex systems inspired in part by biological paradigms such as central pattern generators, and space maps associated to auditory and other sensory modalities; learning binaurally directed movement; sensorimotor feedback in echo-locating bats; hybrid models for networks of sensors and actuators; languages for motion control

Technology of smart materials such as piezo-electric and magnetostrictive materials for use in actuation and sensing; nonlinear problems in such materials; hysteresis modeling and compensation; integration of such materials in structures (e.g. networking); computational methods in ferromagnetism with applications to the design of Terfenol-D actuators

Intelligent processing of materials with a special focus on semiconductor manufacturing; modeling, simulation, monitoring and control in semiconductor manufacturing processes, such as rapid thermal chemical vapor deposition; epitaxial growth of thin films and surface reconstruction in epitaxy

Dynamics and control of formations, swarming, flocking and related biological phenomena; acoustics and biological signal processing; pursuit phenomena and prey capture behavior in nature; evolutionary game-theoretic basis for strategies of pursuit; analysis of field data on starling flocks; inverse problem of reconstructing interaction laws for collectives; cognitive cost of flocking as measured by generative models from data; continuum models of flocks

Subriemannian geometry and optimal control in the study of collectives, and for the design of efficient, nanoscale heat engines; critical dynamics in field theory and related optimal control problems

The research interests described above are supported by a program of experimental investigations in the Intelligent Servosystems Lab (ISL) where, in the period 1986 – 2019, the projects included; experiments in positioning, vibration suppression and impact control of a flexible arm with embedded actuators; mechanical manipulation with a modular hand invented in ISL; a hybrid (piezoelectric-magnetostrictive) motor invented in ISL; nonholonomic robot design; a parallel linkage manipulator invented in ISL; 3-D solid modeling and graphical animation; and motor networks. The primary current emphasis in ISL is on mobile robotics and software for control of collectives of robots. A Vicon motion capture system was installed in 2013 to study collective behavior of robots, and is used to validate principles and algorithms applicable to biological and robotic collectives


ISR remembers Carlos Berenstein

Berenstein, a founding faculty member of ISR, passed away Aug. 24, 2019.

Alumnus Xiaobo Tan elevated to ASME Fellow

Tan was recognized for his work in robotics.

Shoukry, Krishnaprasad receive NSF grant for resilient-by-cognition cyber-physical systems

The researchers will equip autonomous systems with an additional layer of intelligence to improve safety and resilience.

International Workshop on Cyber Deception and Defense addresses threats and countermeasures

The workshop was sponsored by the Army Research Office, the Clark School, ECE and ISR.

ECE Inducts Three New Distinguished Alumni

Ghanadan, Tan, and Viniotis inducted for leadership and meritorious contributions to engineering, humanitarian efforts, and the application of their engineering education to other disciplines.

Northrop Grumman contributes research funding for third consecutive year

Krishnaprasad, Srivastava, Aloimonos each receive $75K for individual research projects.

Alumnus Philip Twu's exciting career in space robotics

Twu has worked on both the Parker Solar Probe and the 2020 Mars Rover.

Alumnus Xiaobo Tan named Withrow Distinguished Scholar at Michigan State

The award recognizes the scholarship of senior faculty members in the MSU College of Engineering.

Alumni Naomi Leonard and Xiaobo Tan part of public lecture on underwater robotics

The lecture was part of the Halcyon Dialogues on Robotics held at AAAS headquarters in Washington, D.C.

Flocks and Form

P. S. Krishnaprasad and alumnus Matteo Mischiati devise a new fiber bundle structure to describe the changing forms of flocks and underlying kinematic modes.

Alumnus Fumin Zhang promoted to full professor at Georgia Tech

His research interests are in the design and control of marine robots and mobile sensor networks, as well as cyber-physical systems theory.

IAI sponsors colloquium series for seventh year

The community-building series features ISR faculty speakers.

Alumna Naomi Leonard wins Hendrik W. Bode Lecture Prize

IEEE Control Systems Society prize recognizes distinguished contributions to control systems science or engineering.

Alum Ram Iyer promoted to full professor at Texas Tech

Iyer has research interests in systems and control theory and their applications in optics, bio-engineering, and cybersecurity of critical infrastructure systems.

Alumnus Xiaobo Tan elevated to IEEE Fellow

His citation reads, “for contributions to modeling and control of smart materials and underwater robots.”

Small collectives and nonlinear dynamics

New paper by Krishnaprasad, Galloway, Justh published in Proceedings of the Royal Society A.

Narayan, Zhou, Schlotfeldt, Strahan win ISR outstanding awards

ISR confers awards of excellence in its annual ceremony.

Four ISR students named to Clark School Future Faculty Fellow program

The program prepares Ph.D. students for academic careers in top-50 engineering schools.

Alum Xiaobo Tan named 'Foundation Professor' at Michigan State

Tan develops bio-inspired underwater robots, electroactive polymer sensors and actuators.

Naomi Leonard to be inducted into Innovation Hall of Fame

Clark School honoring alumna for work in cooperative control

Alumnus Xiaobo Tan promoted to full professor at Michigan State

Tan earned a 2002 Ph.D. in electrical engineering from the University of Maryland.

Optimal control and strong interactions imply flock cohesion

New work suggests that copying behavior in social groups may be governed by optimal control theory

Workshop on Geometry of Collective Behavior organized by P. S. Krishnaprasad

The workshop was part of the 53rd IEEE Conference on Decision and Control.

Alumnus Matteo Mischiati is lead author of sensorimotor control study in Nature

Research shows dragonflies use predictive control strategies, not just simple reactions, to capture prey.

Alum Dimitris Tsakiris improves propulsion of robotic octopus

Paper is finalist for two awards at IROS 2014.

Alum Xiaobo Tan developing robotic fish to 'stalk' real fish in the Great Lakes

The MSU professor's fish will track the movements of lake trout, walleye and lake sturgeon.

Srivastava, Dey, Mirsky, King win 2014 ISR Awards

Awards honor outstanding faculty, graduate and undergraduate students, and staff.

Intelligent Automation Inc. continues sponsorship of colloquia series

First colloquium on Feb. 5 features Derek Paley.

Galloway, Justh, Krishnaprasad publish chasing and flocking research in Proceedings of the Royal Society A

New models and equations aid in understanding of natural phenomena, has implications for engineered networks of robots.

UAE students, Northrop Grumman engineers tour robotics laboratories

Visitors were in town for the annual AUVSI conference.

Krishnaprasad, Jarzynski part of 'Information Engines' MURI

Project will develop principles and algorithms for synthetic information nanosystems.

Two ECE Graduate Students Receive Inaugural Kulkarni Fellowship

Biswadep Dey and Ravi Garg receive assistance from the Kulkarni Foundation in the final stages of their Ph.D. research.

IAI again sponsors colloquia series

First speaker: Steven Gabriel on Feb. 6.

Alum Xiaobo Tan improves robotic fish

Fish now can glide for long distances.

MERIT-BIEN and TREND Fair Showcases Undergraduate Research

More than 20 undergraduate students participate in research projects sponsored by ECE and IREAP.

Krishnaprasad awarded AFOSR DURIP for collective behavior testbed

System will include mobile robots, cameras and enhanced computational resources.

Alum Sean Andersson earns tenure at Boston University

Former student of P. S. Krishnaprasad has research interests in systems and control theory.

Krishnaprasad delivers Princeton Baetjer Colloquium lecture

Was named to the 2012 Baetjer Colloquium Lectureship for contributions to geometric control, filtering theory, robotics and bio-inspired design.

Alum Xiaobo Tan's research featured in NSF Highlight

Story features Tan's artificial muscle-enabled robotic fish.

Alumna Ermin Wei featured in MIT publication

Former ISR award winner is Ph.D. student at MIT.

Alum Matteo Mischiati accepts postdoc position

Mischiati will study dragonfly flight behavior at Howard Hughes Medical Institute.

Alum Kevin Galloway starts postdoc at University of Michigan

Former student of P. S. Krishnaprasad will develop feedback controls for bipedal robots.

Nuno Martins receives NSF grant for animal-borne wireless networks

The $1.8M grant is a collaboration with National Geographic to monitor and protect endangered species.

Roger Brockett honored for devotion to graduate student advising

ISR-affiliated faculty member receives Harvard's Capers and Marion McDonald Award for Excellence in Mentoring and Advising.

Intelligent Automation, Inc. to sponsor colloquia series

IAI president and ISR alumnus Vikram Manikonda announces generous support.

ISR's busy November: NSF site visit, 25th anniversary dinner, SAC meeting

The Institute for Systems Research held three major events from Nov. 17–19.

ISR postdoc Chen Chiu wins outstanding paper prize

Journal of Experimental Biology names article on bat flight behavior best of 2010.

Galloway, Gregorczyk, Gremillion awarded L-3 Graduate Research Fellowships

Fellowships support Ph.D. candidates working in specific research areas.

Krishnaprasad, Cavagna begin new AFOSR collective behavior research

Flocks and swarms of birds and insects will be studied to discern underlying principles, build models and algorithms.

Alumnus Xiaobo Tan Earns Tenure at MSU

Tan, a 2002 ECE alumnus, has been promoted to Associate Professor of ECE at Michigan State University.

Alum Fumin Zhang wins ONR Young Investigator Program award

Former student of P.S. Krishnaprasad is one of only 17 recipients nationwide.

Alumnus Xiaobo Tan receives MSU Teacher-Scholar Award

Assistant professor one of six to win the early career award.

Sezmi launches customer pilot in Los Angeles

Alumni Buno Pati and Phil Wiser founded the start-up TV network.

Alum Xiaobo Tan receives new autonomous robotic fish grant

The highly maneuverable, energy-efficient gliding fish will monitor aquatic environments.

Alumnus Fumin Zhang wins NSF CAREER Award

Research aims to better control tasks supported by embedded computing devices and batteries.

ISR alumnus Buno Pati to be inducted into Clark School Innovation Hall of Fame

Pati will be honored for developing phase-shift lithography.

Alumnus Xiaobo Tan to Lead New NSF Program for Secondary School Teachers

"Research Experiences for Teachers" will focus on biology-inspired technology and systems.

Honda's Tetsuaki Nakano, Kensuke Iwanaga give final presentations

ISR visiting research scientists spoke on bipedal locomotion; bipolar junction transistors.

Alumnus Sean Andersson receives NSF CAREER Award

Research will focus on nonlinear control for single molecule tracking.

ISR awards ceremony honors faculty, graduate student, staff member

Five individuals honored for outstanding contributions in 2008–2009.

Alumnus Narasingarao Sreenath promoted to full professor at Case Western Reserve

Sreenath directs Case Western's Complex Systems Biology Center.

Carlos Berenstein to retire in July

The Math/ISR professor gave a special lecture on May 21.

Paper by Krishnaprasad, Justh, Wei published in Proceedings of the Royal Society A

Paper offers possible evolutionary basis for flight behavior in echolocating bats.

Six ISR students chosen for Clark School's Future Faculty Program

The program aims to increase the number of Ph.D. graduates who obtain academic positions in prestigious engineering schools.

Six ISR students selected for Future Faculty Program

Clark School program helps students prepare for academic positions.

Alumnus interview: Herbert Struemper

The 1997 ECE Ph.D. develops mechanistic disease models for drug discovery.

Manikonda Named President of Intelligent Automation, Inc.

Alumnus earned Ph.D. with Krishnaprasad in 1997.

Alumnus interview: Reza Shahidi

The Qualcomm engineer talks about his career in the wireless communication industry.

Alumnus Tan Presents Research at Capitol Hill Science Funding Event

Xiaobo Tan, assistant professor at Michigan State, showcased his research at a June event in DC.

Krishnaprasad gives inaugural Cymer Distinguished Lecture

Cymer Center for Control Systems and Dynamics

ISR welcomes two Honda Visiting Scholars

Kensuke Iwanaga and Tetsuaki Nakano are here for 14 months.

REU students spending summer in research

The 12 undergraduate students are participating in NSF's Research Experiences for Undergraduates program.

Vorontsov, Koev, Wei and McKinney win at ISR awards ceremony

Quartet honored for outstanding contributions in 2007–2008.

Galloway and Tjoa Awarded Summer Research Fellowships

ECE graduate students were selected for new summer research fellowships designed to support doctoral students.

Alumnus interview: George Kantor

He tells us about the DEPTHX underwater robot project.

Alumnus Xiaobo Tan receives ONR grant for biomimetic robotic fish

Robots are based on biological principles and incorporate biomimetic electroactive polymers.

All Things Considered explores icy waters with DEPTHX

ECE/ISR alumnus George Kantor's control research contributes to autonomous underwater vehicle's success.

P.S. Krishnaprasad gives Bode Lecture

Winner of 2007 Bode Prize spoke at 46th IEEE CDC Conference.

Alum Andrew Newman wins Hart Prize for Development

Award is for automated collaborative dynamic retasking project.

Alumnus George Kantor promoted at Carnegie-Mellon

Kantor's research also featured in Sept. 2007 IEEE Spectrum magazine.

ISR's Intelligent Servosystems Lab places two summer interns at Intelligent Automation Inc.

Matteo Mischiati and Philip Twu are the first IAI interns in a new collaborative program.

ISR faculty host CRCNS Principal Investigators' Meeting

Event at University of Maryland draws 130 participants.

ISR alum Fumin Zhang joins Georgia Tech faculty

The 2004 ECE Ph.D. is currently a postdoc at Princeton working with Naomi Leonard.

ISR alum Andrew Newman promoted at Johns Hopkins Applied Physics Lab

Former student of P.S. Krishnaprasad has been with APL since 2003.

Shihab Shamma wins outstanding faculty award

Research has uncovered computational principles underlying the processing and recognition of complex sounds in the auditory system.

ISR alum Ram Venkataraman Iyer earns tenure at Texas Tech

Former student of P.S. Krishnaprasad specializes in systems and control theory in the context of aerospace and smart structures.

ISR alums Leonard, Tassiulas named IEEE Fellows

Both earned Electrical Engineering Ph.D.s in the early 1990s.

Krishnaprasad, Baras, Moss participating in new MURI awards

ISR faculty on teams researching MANETs, sensor networks and micro air vehicles for Department of Defense.

Krishnaprasad Receives IEEE Bode Prize

Clark School faculty member earns IEEE society's distinguished award in controls.

Krishnaprasad delivers Munich Mathematical Colloquium lecture

Control expert speaks on "Geometric Control, Cohesion and Pursuit."

ISR undergrad Travis Young named Merrill Presidential Scholar

Senior mentored by Krishnaprasad; active in Intelligent Servosystems Lab.

Stealth strategy paper by Justh, Krishnaprasad published

Researchers develop simple model that represents the engagement of pursuing bats and their insect prey

Twelve REU students welcomed

Summer experience gives undergrads the opportunity to work with ISR researchers

Bats use 'guided missile' strategy

A new study from four ISR researchers shows bats use a guided missile strategy to catch their prey.

Grad student's high altitude work highlighted in GPS World

ISR grad student Luke Winternitz has co-written an article on his NASA work for GPSWorld magazine, explaining the development of a GPS receiver for high-altitude (above the GPS constellation) satellite navigation.

ISR alum Xiaobo Tan wins NSF CAREER Award

ISR alum and current Michigan State University ECE Assistant Professor Xiaobo Tan has won a National Science Foundation Faculty Early Career Development (CAREER) Award for his research, "Dexterous Biomimetic Micromanipulation Using Artificial Muscles: Modeling, Sensing and Control."

Berenstein, Krishnaprasad contribute to new signal processing book

Work is based on 2004 symposium honoring Berenstein

Abed, Baras, Krishnaprasad, Justh speak at swarming workshop

Speakers apply natural behaviors to networked groups of autonomous vehicles

ISR alum Sean Andersson joins Boston University faculty

Will be assistant professor in aerospace and mechanical engineering

Vorontsov, Krishnaprasad, Justh and Beresnev receive sensor patent

Invention uses phase spatial light modulators

ISR alum George Kantor co-authors new robotics book

Principles of Robot Motion includes theory, algorithims and implementation

ISR collaborations with Toshiba

Toshiba researchers explore future research collaborations and reliability engineering

ISR alumna Naomi Leonard delivers distinguished lecture

Underwater robotics specialist speaks at UC Santa Barbara

Naomi Leonard profiled in New York Times

ISR alumane is MacArthur Foundation Fellow.

Moss is PI for "Innovative Technologies Inspired by Biosonar"

Research will study transformation of sensory information to motor commands for adaptive behaviors.

Alum Naomi Leonard named as MacArthur Fellow

Sept 2004—Expert in underwater robotics research receives coveted, no-strings-attached "genius" grant.

ISR's Xiaobo Tan joins Michigan State University

July 2004—Former ISR research associate to become Assistant Professor in ECE department.

Carlos Berenstein honored with celebration of his career

June 2004—ISR professors among speakers at the event, hosted by George Mason University.

Horiuchi, Krishnaprasad receive $286,000 AFOSR grant

Research to focus on "Neuromorphic VSLI-Based Bat Echolocation for Micro-Aerial Vehicle Guidance"

Leonard is Principal Investigator

ISR alum heads investigation for the Department of Defense

ISR faculty showcase research to Honeywell Labs delegation

Research of Baras, Abshire, Ghodssi, Krishnaprasad and Justh featured.

Leonard conducts underwater robotics research

Team launched fleets of underwater vehicles into the Pacific Ocean

Faculty participating in three different MURI awards

Research includes networked control systems, hybrid smart materials and radiofrequency pulses

Shamma, Horiuchi, Baras, Krishnaprasad, Moss awarded acoustic sensors contract

Team will develop intelligent and noise-robust interfaces for MEMS acoustic sensors for DARPA

Institute of Electrical and Electronics Engineers (IEEE)

  • Fellow, 1990