Perry Li

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Perry Li

Professor, Mechanical Engineering


Mechanical Engineering
Room L106
111 Church Street SE
Minneapolis, MN 55455


Director, Mechatronics and Intelligent Machines Lab

Ph.D. 1995, Mechanical Engineering, University of California at Berkeley
M.S. 1990, Biomedical Engineering, Boston University
B.A. 1987, Electrical and Information Sciences, Cambridge University

Professional Background

Professor of Mechanical Engineering, University of Minnesota, 2008-present
Deputy Director NSF ERC for Compact and Efficient Fluid Power , University of Minnesota, 2006-2013
Associate Professor of Mechanical Engineering, University of Minnesota, 2003-2008
Graduate Faculty of the Control Science and Dynamics Program (CsDy) at the University of Minnesota, 2001-present
Nelson Assistant Professor of Mechanical Engineering, University of Minnesota, 1997-2003
Visiting Faculty to Department of Mechanical Engineering, Bath University, UK, 2001
Member of Research Staff, Wilson Center for Research and TechnologyXerox Corporation, 1995-1997
Postdoctoral Researcher, California PATH, 1995
Graduate Student Researcher / Teaching Assistant, Department of Mechanical Engineering, University of California, Berkeley, 1990-1995
Research Engineer, Anesthesia Bioengineering Unit, Massachusetts General Hospital, 1990
Biomechanics Consultant, 1990
Teaching and Research Fellow, Neuromuscular Research Center and Dept. of Biomedical Engineering, Boston University, 1987-1989

Scientific & Professional Societies

Fluid Power Research Lab — ME 451/453
Mechatronics & Intelligent Machines Laboratory — ME 3130

Research Interests

My research interests lie in the area of control, mechatronics and fluid power. Recent and current application areas include:

  • Energy systems: Compressed air energy storage for wind turbines, liquid piston natural gas compression
  • Human interactive robotic systems such as teleoperators, human power amplifiers, adaptive exercise machines, nonlinear and intelligent control
  • Fluid power systems: Mechatronics concepts for the fluid power components; control of fluid power systems, compact energy storage, hydraulic hybrid vehicles
  • Robotics: Underwater vehicle/manipulator systems; swimming machines; passive robotic manipulations; paper manufacturing and robotics
  • Imaging systems: Sensing and control of digital color printers; media handling
  • Transportation: Control of automated vehicles, traffic flow stability, hydraulic hybrid vehicles
  • Biomedical: Devices for minimally invasive diagnostics and treatment; biomechanics of human motion
Honors and Awards
  • Young Investigator Award in Flexible Automation, Japan-USA Symposium on Flexible Automation, 2000-2002.
  • Achievement Award, Corporate Research & Technology, Xerox Corporation , 1996
  • Special Recognition Award, Corporate Research & Technology, Xerox Corporation, 1997
  • Teaching Fellow, Biomedical Engineering, Boston University, 1987-88
  • Exhibitioner, Downing College, Cambridge University, 1986-87
  • Whitby Scholarship, Downing College, Cambridge University, 1984-86
Selected Publications


  • S.Y. Lee, P. Y. Li and F. Eskilsson, "Energetically Passive Multi Degree-of-Freedom Hydraulic Human Power Amplifier with Assistive Dynamics", IEEE Trans. on Control Systems, 2019. [To appear]
  • H. Tian, P. Y. Li and J. D. Van de Ven, "Valve Timing Control for a Digital Displacement Hydraulic Motor using an Angle-Domain Repetitive Controller", ASME/IEEE Trans. on Mechatronics, 2019. [To appear].
  • Z. Du, K. L. Cheong and P. Y. Li, "Energy Management Strategy of a Power-split hydraulic hybrid vehicle based on Lagrange Multiplier and Its Modifications", Proc. of the IME, Part I: Journal of Systems and Control, 2018 [To appear].
  • A. Srivatsa and P. Y. Li, "How moisture content affects the performance of a liquid piston air compressor/expander", J. of Energy Storage, 2018., pp.121-132.
  • J. Wieberdink, P. Y. Li, T. W. Simon and J. D. Van de Ven, "Effects of Porous Media Insert on the Efficiency and Power Density of a High Pressure (210 bar) Liquid Piston Air Compressor/Expander - An Experimental Study", Applied Energy (212), Feb., 2018, pp. 1025-1037.

See a full list of publications