(The articles below are copyrighted, and should be cited when used in any document)

Journal Articles:

Ram Iyer, Farzana Nasrin, Elton See, Steven Mathews,
`Smoothing splines on Disk Domains with Application to Corneal Topography`", IEEE Trans. Med. Imaging,  Vol. 36, No 2. 2017, pp. 518 - 526.

Bhagya Athukorallage, Ram Iyer,
``Investigation of energy dissipation due to contact angle hysteresis in capillary effect", Journal of Physics,  Conf. ser., Vol. 727, 012003, 2016, 15 pages.

Bhagya Athukorallage, Eugenio Aulisa, Ram Iyer, Larry Zhang,
``Macroscopic Theory for Capillary Pressure Hysteresis",
Langmuir, Vol. 31, No. 8, 2015, pp. 2390 - 2397.

Mark Lira, Ram Iyer, A. Alexandre Trindade, Victoria Howle
``QR versus Cholesky: A Probabilistic Analysis",
International Journal of Numerical Analysis and Modeling, Vol 13, No. 1, 2016, pp. 114-121.

D. Ekanayake, R. Iyer,
``Stabilization of a system with saturating, non-monotone
hysteresis and frequency dependent power losses by a PD
controller", Journal of Physics, 2015, 10 pages, in
press.

B. Athukorallage, R. Iyer, `` Energy dissipation due to viscosity during deformation of
a capillary surface subject to contact angle hysteresis",
Phyisca B, Volume 435, 2014, pp 28 - 30.

G. Pearson, R. Iyer, S. Mathews,``An Interpolation Method using the Biharmonic equation
for Rigid Contact Lenses", International Journal of Numerical
Analysis and Modeling
, 2013, Vol. 4, No. 2, pp 167 - 178.

D. Ekanayake, R. Iyer, ``Proportional derivative control of Hysteretic systems",
SIAM Journal of Control and Optimization, 2013, Vol. 51, No.5, pp. 34153433.

R. Iyer, K. Long, and J. Millhollon, ``Micromagnetics and Eddy
currents", Journal of Physics, 2011, Vol. 268,
No. 1, doi:10.1088/1742-6596/268/1/012011.

R. Iyer and X. Tan, ``Control of
hysteretic systems through inverse compensation", IEEE
Control Systems Magazine
, Feb. 2009, Vol. 29, No. 1, pp 83 - 99.

X. Tan and R. Iyer, ``Modeling and
control of hysteresis", IEEE Control Systems Magazine, Feb.
2009, Vol. 29, No. 1, pp 26 - 29.

J. Meixner and R. Iyer
``Mathematical model of a multiple lens-single fiber system in a
compound eye", International Journal of Applied
Electromagnetism and Mechanics
, 2008, Vol. 28, No. 1-2, pp 73-78.

R. Iyer, M. Toda and {R.
Holsapple, ``On an optical inertial navigation system, Part -
II", IEEE Transactions on Automatic Control, Nov. 2008, Vol. 53, No. 8, pp 1864-1875.

R. Iyer, J. Meixner and R. Buckalew , ``On an optical inertial navigation system, Part - I", IEEE
Transactions on Automatic Control
, Nov. 2008, Vol. 53, No. 8, pp. 1850-1863.

R. V. Iyer and D. Ekanayake, ``Extension of Hysteresis Operators of Preisach type to real, Lebesgue measurable functions", (2007), Physica B: Condensed Matter, Feb. 2008, Vol. 403, Iss. 2-3, pp 437 - 439. http://dx.doi.org/10.1016/j.physb.2007.08.069

D. Ekanayake and R. V. Iyer, ``Asymptotic behavior of a low dimensional model for magnetostriction for periodic inputs", Physica B: Condensed Matter, Feb. 2008, Vol. 403, Iss. 2-3, pp 257 - 260. http://dx.doi.org/10.1016/j.physb.2007.08.023

D. Ekanayake and R. V. Iyer, ``Study of a Play-like operator" Physica B: Condensed Matter, Feb. 2008, Vol. 403, Iss. 2-3, pp 456 - 459. http://dx.doi.org/10.1016/j.physb.2007.08.074.  

R. Holsapple, R. V. Iyer and D. Doman, ``Variable step-size selection methods for implicit integration schemes for ODEs", International Journal of Numerical Analysis and Modeling, 2007, volume 4, number 2, pages 212 - 242.

R. McNeely, R. V. Iyer and P. Chandler, "Tour Planning for an Unmanned Air Vehicle under Wind Conditions",  Vol. 30, No. 5, pp 1299 - 1306, Sep-Oct 2007, Journal of Guidance, Control and Dynamics.

R. V. Iyer and R. Paige, ``On the representation of hysteresis Operators of Preisach Type", Volume 372, Issue 1 - 2, Pages 40 - 44, Feb 2006, Physica B: Condensed Matter.

R. V. Iyer and S. Manservisi, ``On a low-dimensional model for magnetostriction", Volume 372, Issue 1 - 2, Pages 378 - 382, Feb 2006, Physica B: Condensed Matter.

R. V. Iyer, R. Holsapple and D. Doman, ``Optimal Control
Problems on Parallelizable Riemannian Manifolds: Theory and
Applications"
(2006), January, Vol. 12, pp 1 - 11, ESAIM: Control, Optimisation and Calculus of Variations.

R. V. Iyer, X. Tan and P. S. Krishnaprasad, ``Approximate
Inversion of Hysteresis with Application to Control of Smart Actuators"
, Volume 50, Issue 6, Pages 798 - 810, June 2005, IEEE Transactions on Automatic Control.

R. V. Iyer, and P. S. Krishnaprasad, ``On a low-dimensional
model for ferromagnetism
", Nonlinear Analysis: Theory, Methods and
Application, Volume 61, Issue 8, Pages 1447 - 1482, June 2005,
(http://www.sciencedirect.com/science/article/B6V0Y-4FV35B1-5/2/cc203723507e65533ce2f39437889bd6).

R. V. Iyer, and M. Shirley, ``Hysteresis Parameter
Identification with Limited Experimental Data
", Vol. 40, No. 5, Sep 2004, pp 3227 - 3239, IEEE Transactions on Magnetics.

R. Holsapple, R. Venkataraman, and D. Doman, ``A New, Fast
Numerical Method for Solving Two-point Boundary Value Problems
"
(2004), Vol. 27, No. 2, March-April 2004, pp 301 - 304, Journal of
Guidance, Control and Dynamics.

Refereed Collection:

R. Iyer, R. Arizpe and P. Chandler,
``On the Existence of Minimum Time Optimal Trajectory for Micro
Air Vehicles under Wind Conditions", Emergent problems in
nonlinear systems and control
, Bijoy K. Ghosh, Clyde F. Martin
and Yishao Zhou (eds.) , Lecture notes in control and information
sciences, 2009, vol. 393, pp. 57-77.

Conference Proceedings:

Y. Hua, R. Iyer, ``On the solution of operator equations with application to Preisach density estimation", Proc. American Control
Conf.
, 2016, 6 pages.

B. Athukorallage, R. Iyer, ``Model of a Contact Lens
and Tear Layer at Static Equilibrium", Proc. American Control
Conf.
, 2013, pp. 3605 - 3612.

D. Ekanayake, R. Iyer, ``Robust Control of
magnetostrictive actuators with uncertain system" (2008),
Proc. ASME Smart materials, Adaptive structures, and Intelligent
systems Conference
, October 2008, Ellicott City, MD.

A. Trent, R. Iyer and D. Doman, ``Trajectory Planning
using a Modified Simple Shooting Method for a Reentry Vehicle
under Failure Conditions" (2007), Proc.
AIAA/IEEE American Control Conference
, July 2007, New York, NY.

D. Ekanayake and R. Iyer, ``Wide Band Modeling and Parameter Identification for Magnetostrictive Actuators" (2007), accepted and to appear in Proc. IEEE American Control Conference, July 2007, New York, NY.

A. Trent, R. Iyer and D. Doman, ``Trajectory Planning for a Re-entry Vehicle under Failure Conditions" (2007), accepted and to appear in Proc. IEEE American Control Conference, July 2007, New York, NY.

R. Holsapple, R. Iyer and D. Doman, ``A Variable Time-Step Selection Method for Implicit Integration Schemes" (2006), Proc. IEEE
American Control Conference
, pp. 3013 - 3018, June 2006, Minneapolis, MN.

R. V. Iyer, Z. He and P. Chandler, ``On the Computation of the Ego-Motion and Distance to Obstacles for a Micro Air Vehicle" (2006),  Proc. IEEE
American Control Conference
, pp. 2554 - 2559, June 2006, Minneapolis, MN.

Z. He, R.V. Iyer and P. Chandler, ``Vision-based UAV Flight Control and Obstacle Avoidance" (2006), Proc. IEEE
American Control Conference
, pp. 2166 - 2170, June 2006, Minneapolis, MN.

R. V. Iyer, ``Tensor SVD and distributed control" , Proc. SPIE Conf. Smart Structures and Materials 2005:
Modeling, Signal Processing and Control in Smart Structures
,
San Diego CA, R. Smith Ed., vol.
5757, pp 258 - 268, SPIE, Bellingham.

R. V. Iyer, R. Holsapple and P. Chandler, ``A New Method for the Computation of Motion from Image Sequences" (2005), Proc. IEEE
American Control Conference
, June 2005, Vol. 6, pages 4113 -- 4118,
Portland, OR.

R. V. Iyer, ``Recursive Estimation of the Preisach Density Function for a Smart Actuator" (2004), Proc. SPIE Conf. Smart Structures and Materials 2004:
Modeling, Signal Processing and Control in Smart Structures
,
San Diego CA, R. Smith Ed., Vol. 5383, pp. 202 -- 210.

R. Venkataraman, M. Oppenheimer and D. Doman, ``A New Control
Allocation Method that accounts for Effector Dynamics
" (2004),  Proc. IEEE Aerospace Conference, Big Sky,
MT.

A. Trent, R. Venkataraman and D. Doman, ``Trajectory Generation
Using A Modified Simple Shooting Method
" (2004),
Proc. IEEE Aerospace Conference, Big Sky, MT.

R. Holsapple, R. Venkataraman and D. Doman, ``A Modified Simple
Shooting Method for solving Two Point Boundary Value Problems
"
(2003), Vol. 6, pp. 2783-2790, Proc. IEEE Aerospace
Conference
, Big Sky, MT.

M. Shirley and R. Venkataraman, ``On the Identification of
Preisach Measures
" (2003), Vol 5349, pp. 326--336, R. Smith ed.
Proc. SPIE Conf. Smart Structures and Materials 2003:
Modeling, Signal Processing and Control in Smart Structures
,
SPIE, Bellingham.

R.Venkataraman and D. Doman, ``Control Allocation and
Compensation for Nonlinear Effectors
" (2001), Proc. IEEE
American Control Conference
, June 2001, Arlington, VA.

X.Tan, R. Venkataraman and P.S. Krishnaprasad,``Control of
Hysteresis: Theory and Experimental Results
" (2001), V. Rao ed.
Proc. SPIE Conf. Smart Structures and Materials 2001: Signal
Processing and Control in Smart Structures
, SPIE, Bellingham.

R.Venkataraman and P.S. Krishnaprasad, ``Approximate Inversion of
Hysteresis: Theory and Numerical Results
" (2000),  Proc. IEEE
Conf. on Decision and Control
, December 2000, Sydney, Australia.

R.Venkataraman and P.S. Krishnaprasad, ``A Model for a thin
Magnetostrictive Actuator
" (1998), 32nd Conference on
Information Sciences and Systems
, Princeton University,
Princeton, NJ 08542, pp 813 -- 818.

R. Venkataraman, J. Loncaric, W.P. Dayawansa and P.S.
Krishnaprasad, ``A Smart Motor Concept Based on
Piezoelectric-Magnetostrictive resonance" (1995), in I. Chopra ed.
Proc. SPIE Conf. Smart Structures and Materials 1995: Special
Conf. Smart Structures and Integrated Systems
, SPIE vol. 2443,
pp. 763-770, SPIE, Bellingham.

Unpublished:

R. V. Iyer, "Pontryagin's Minimum Principle for simple mechanical systems on Riemannian manifolds and Lie Groups", preprint, (2005), 22 pages.

Inventions:

Hybrid Motor : University of Maryland Disclosure
PS-96-048}. Office of Technology Liaison, University of Maryland, College Park, MD 20742.

  1. Construction Details - Movie
  2. Experimental Set Up - Movie (Somewhat Noisy)
  3. In Operation - Movie (Noisy!!)

A procedure that optimizes the correction of lower and higher-order aberrations with contact lenses that account for lens motion on the cornea, TTU ORC # D-1285.

Technical Reports:

R.Venkataraman and M. Oppenheimer, ``Engineering development for
adaptive guidance and control of hypersonic vehicles " (2002), 115
pages, technical report (AFRL-VA-WP-TR 2002-3034), Air Force
Research Laboratory, Air Vehicles Directorate, WPAFB, OH.

R.Venkataraman, J. Rameau and P.S. Krishnaprasad,
``Characterization of the ETREMA MP6 magnetostrictive actuator",TR
98-1, Technical report of the Institute for Systems Research,
University of Maryland, College Park, MD 20742. Can be downloaded
from --
http://www.isr.umd.edu/TechReports/ISR/1998/TR\_98-1/TR\_98-1.phtml

R.Venkataraman, W.P. Dayawansa and P.S. Krishnaprasad, ``The
Hybrid Motor Prototype: Design Details and Demonstration Results",
TR 98-2, Technical report of the Institute for Systems Research,
University of Maryland, College Park, MD 20742. Can be downloaded
from --
http://www.isr.umd.edu/TechReports/ISR/1998/TR\_98-2/TR\_98-2.phtml

 


Revised: 10/16/17.