Eric Justh

ISR Affiliate and Former Assistant Research Scientist

[my photo]


Institute for Systems Research
Intelligent Servosystems Laboratory (ISL)
Department of Electrical and Computer Engineering
University of Maryland at College Park
Center for Communicating Networked Control Systems (ARO-MURI01)
Center for Dynamics and Control of Smart Structures (ARO-MURI97)
Prof. P.S. Krishnaprasad (former advisor and close collaborator)

UAV Formation Control - Project Overview

P.V. Reddy, E.W. Justh, and P.S. Krishnaprasad, "Motion camouflage in three dimensions," preprint, 2006 (arXiv:math.OC/0603176v1).

E.W. Justh and P.S. Krishnaprasad, "Natural frames and the design of interaction laws in three dimensions," Institute for Pure and Applied Mathematics (IPAM) workshop on "Swarming by Nature and by Design," Feb. 27 - Mar. 3, UCLA, 2006.

E.W. Justh and P.S. Krishnaprasad, "Natural frames and interacting particles in three dimensions," Proc. IEEE Conf. Decision and Control, pp. 2841-2846, 2005 (see also arXiv:math.OC/0503390v1).

E.W. Justh and P.S. Krishnaprasad, "Steering laws for motion camouflage," preprint, 2005 (arXiv:math.OC/0508023).

F. Zhang, E.W. Justh, and P.S. Krishnaprasad, "Boundary following using gyroscopic control," Proc. IEEE Conf. Decision and Control, pp. 5204-5209, 2004.

E.W. Justh, P.S. Krishnaprasad, and F. Zhang, "Geometry of Steering Laws in Cooperative Control," presented by P.S. Krishnaprasad at the Workshop on Lie Group Methods and Control Theory, Edinburgh, Scotland, June 29, 2004.

E.W. Justh, P.S. Krishnaprasad, "Swarms in three dimensions," poster presented at Tech 2004, University of Maryland, College Park, Mar. 19, 2004.

E.W. Justh and P.S. Krishnaprasad, "Equilibria and steering laws for planar formations," Systems and Control Letters, Vol. 52, pp. 25-38, 2004.

E.W. Justh and P.S. Krishnaprasad, "Steering laws and continuum models for planar formations," Proc. IEEE Conf. Decision and Control, Vol. 4, pp. 3609-3614, 2003.

E.W. Justh and P.S. Krishnaprasad, "Planar Steering Laws and UAV Formations," Institute for Systems Research Student-Faculty Colloquium presentation, April 29, 2003.

This MPEG movie illustrates the two-vehicle rectilinear control law.

This MPEG movie illustrates the multi-vehicle rectilinear control law.

This MPEG movie illustrates the multi-vehicle circular control law.

E.W. Justh and P.S. Krishnaprasad, "Swarms, Curvature, and Convergence," Poster presented at Research Review Day, University of Maryland College Park, March 21, 2003.

E.W. Justh and P.S. Krishnaprasad, "A Simple Control Law for UAV Formation Flying," Institute for Systems Research Technical Report 2002-38, 2002.


High-Resolution Adaptive Optics - Project Overview

E.W. Justh, P.S. Krishnaprasad, and M.A. Vorontsov, "Analysis of a high-resolution optical wavefront control system," Automatica, Vol. 40, pp. 1129-1141, 2004.

M.A. Vorontsov, E.W. Justh, and L.A. Beresnev, "Adaptive Optics with Advanced Phase-Contrast Techniques: Part I. High-Resolution Wavefront Sensing," Journal of the Optical Society of America A, Vol. 18, No. 6, pp.1289-1299, 2001.

E.W. Justh, M.A. Vorontsov, G.W. Carhart, L.A. Beresnev, and P.S. Krishnaprasad, "Adaptive Optics with Advanced Phase-Contrast Techniques: Part II. High-Resolution Wavefront Control," Journal of the Optical Society of America A, Vol. 18, No. 6, pp. 1300-1311, 2001.

E.W. Justh and P.S. Krishnaprasad, "Analysis of a High-Resolution Optical Wavefront Control System," Proc. Conf. on Information Sciences and Systems, Vol. 2, pp. 718-723, 2001 (also ISR TR 2002-5).

E.W. Justh, P.S. Krishnaprasad, and M.A. Vorontsov, "Nonlinear Analysis of a High-Resolution Optical Wavefront Control System," Proc. 39th IEEE Conference on Decision and Control, 3301-3306, IEEE, New York, 2000 (also ISR TR 2001-6).

M.A. Vorontsov, E.W. Justh, and L.A. Beresnev, "Advanced phase-contrast techniques for wavefront sensing and adaptive optics," in High-Resolution Wavefront Control: Methods, Devices, and Applications II, J.D. Gonglewski, M.A. Vorontsov, and M.T. Gruneisen, eds., SPIE Proc., Vol. 4124, pp. 98-109, 2000 (also ISR TR 2001-7).

E.W. Justh, M.A. Vorontsov, G.W. Carhart, L.A. Beresnev, and P.S. Krishnaprasad, "Adaptive wavefront control using a nonlinear Zernike filter," in High-Resolution Wavefront Control: Methods, Devices, and Applications II, J.D. Gonglewski, M.A. Vorontsov, and M.T. Gruneisen, eds., SPIE Proc., Vol. 4124, pp. 189-200, 2000 (also ISR TR 2001-5).

G.W. Carhart, M.A. Vorontsov, and E.W. Justh, "Opto-electronic Zernike filter for high-resolution wavefront analysis using a phase-only liquid-crystal spatial light modulator," in High-Resolution Wavefront Control: Methods, Devices, and Applications II, J.D. Gonglewski, M.A. Vorontsov, and M.T. Gruneisen, eds., SPIE Proc., Vol. 4124, pp. 138-147, 2000 (also ISR TR 2001-2).


Pattern-forming Systems - Project Overview

E.W. Justh and P.S. Krishnaprasad, "Pattern-forming systems for control of large arrays of actuators," Journal of Nonlinear Science, Vol. 11, No. 4, pp. 239-277, 2001.

E.W. Justh and P.S. Krishnaprasad, "Analysis of a Complex Activator-Inhibitor Equation," Proc.American Control Conference, Vol. 3, pp. 1613-17, 1999 (also ISR TR 99-13).

E.W. Justh, P.S. Krishnaprasad, "A Lyapunov functional for the cubic nonlinearity activator-inhibitor model equation." Proc. IEEE Conference on Decision and Control, pp. 1404-1409, 1998 (also ISR TR 98-36).

E.W. Justh, Control of Large Actuator Arrays Using Pattern-Forming Systems. Institute for Systems Research Ph.D. Thesis report, Ph.D. 98-6, 1998.

Demos: Simulation results showing the behavior of solutions of the cubic nonlinearity activator-inhibitor equation.


CV for Eric Justh

ISR bio page for Eric Justh

As a graduate student, Eric Justh was the University of Maryland, College Park's first ARCS scholar. ARCS stands for Achievement Rewards for College Scientists. The ARCS Foundation is a private, non-profit organization that raises funds to provide scholarships for graduate students in the sciences.

"The ARCS Foundation is dedicated to helping meet our country's need for scientists and engineers by providing scholarships to academically outstanding students who are United States citizens in need of financial assistance to complete their higher education, thereby contributing not only to the advancement of science, but also to the material and intellectual welfare of all people." - ARCS alumni newsletter, May 1997.


Page maintained by Eric Justh. Send comments to
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Last Updated: Nov. 22, 2005.