C. D. Johnson, Ph.D.


johnsonDistinguished Professor Emeritus
Electrical & Computer Engineering

Office:
Phone:
Fax:
E-mail:

EB 263H
(256) 824-6293
(256) 824-6803
johnso2@uah.edu


Education

1963
1958
1958

     Ph.D.
     M.S.
     B.S.

     Purdue University
     University of Tennessee, Knoxville
     University of Tennessee, Knoxville 

Biography

 

Since 1963 Dr. Johnson has been actively involved in the development of new approaches to the design of high-performance stabilization, set-point regulation, servo-tracking, guidance laws and adaptive control systems for rockets, missiles and other dynamical systems which must operate in environments with uncertain, persistently-acting disturbances and parameter-variations. These research efforts have led to the development of a wide variety of new control techniques including the theories of: subspace-stabilization control, disturbance-accommodating control, Chebyshev-minimax control, optimal bang-bang control, optimal linear-saturating control, optimal disturbance-utilizing control, linear adaptive control, inter-sample control for discrete-time systems, “smart” active-control of vibrations and structures, inverse-system realization methods, new methods for real-time system identification and deconvolution, singular-solution methods in optimal control, optimal real-time allocation of scarce resources, and exact time-varying eigenvalue methods for linear time-varying dynamical systems

Research Expertise

  • High-performance stabilization,
  • Set-point regulation, servo-tracking, guidance laws and
  • Adaptive control systems for rockets, missiles and other dynamical systems

Honors & Awards

  • Dr. Johnson's theory of "Disturbance-Accommodating Control (DAC)" has been honored at three national conferences by featuring special technical sessions devoted exclusively to DAC papers:  (1) the 1978 Conference of the Society for Engineering Science held at the University of Florida, Gainesville, FL, December 1978; (2) at the First International Symposium on Policy Analysis and Information Systems, Duke University, June 1979; and   (3) the 1986 American Control Conference, Seattle, WA, June 1986.
  • The Journal of Interdisciplinary Modeling and Simulation devoted an entire issue of the journal to Dr. Johnson's DAC Theory; see "Special Issue on Disturbance-Accommodating Control," Journal of Interdisciplinary Modeling and Simulation, Vol. 3, No. 1, 1980.
  • Dr. Johnson was one of the invited contributors in the IEEE Control Society's Special Benchmark Issue on "The LQG Problem" published as the December 1971 issue of the   IEEE Trans. on Automatic Control.
  • Dr. Johnson was awarded the title of "Distinguished Professor" of Electrical and Computer Engineering, by the University of Alabama System Board of Trustees, November 1990.

Recent Publications

Davenport, Quint, and C. D. Johnson, “Extension of Discrete/Continuous Control to Accommodate Actuator Dynamics,” Proceedings of the IEEE 45th Southeastern Symposium on System Theory, Baylor University, Waco, Texas, March 10-12, 2013. Peer reviewed by an IEEE Approved Process; available @ IEEE Xplore website.

 Hunt, Ashley and C. D. Johnson, “Real-Time Initial-Condition Injection Technique for Implementation of Discrete/Continuous Control-Algorithms,” Proceedings of the IEEE 45th Southeastern Symposium on System Theory, Baylor University, Waco, Texas, March 10-12, 2013. Peer reviewed by an IEEE Approved Process; available @ IEEE Xplore website.

Johnson, C.D., “A Canonical Form for the Formulation and Solution of Multivariable, Optimal Energy-Harvesting Problems,” Proceedings of the IEEE 2012 Southeastern Symposium on System Theory, University of North Florida, Jacksonville, FL, March 11-13, 2012, pp. 1-6.  Peer reviewed by an IEEE Approved Process; available @ IEEE Xplore website.

Hunt, Ashley and C. D. Johnson, “Continuation of a Catalog of Explicit, Closed-Form, Symbolic Expressions for the Dual-Kernel, Matric Convolution-Integral for some Simple Generic Examples in Discrete/Continuous Control Theory,” Proceedings of the IEEE 2012 Southeastern Symposium on System Theory, University of North Florida, Jacksonville, FL, March 11-13, 2012, pp. 34-39.  Peer reviewed by an IEEE Approved Process; available @ IEEE Xplore website.

Johnson, C.D. "On the Cone (x) of Realizable State-Velocities  for Controlled Dynamical Systems," Proceedings of the 2011 IEEE SouthEastCon Conference, Nashville, TN., March, 2011.

Hall, David and C. D. Johnson, " Performance of Bumpless and Smooth-Bumpless D/C-Type Discrete-Time Controllers," Proceedings of the 43rd. IEEE Southeastern Symposium on System Theory, Auburn University, Auburn, AL; March, 2011; peer-reviewed by IEEE-approved process; available @ the IEEE Xplore Web Site.

Johnson, C.D. “On the Stability-Robustness of Linear Dynamical Systems,” Proc. of the 42nd IEEE Southeastern Symposium on System Theory, Univ. of Texas at Tyler, Tyler, TX; March 7,8,9, 2010; pp. 15-18; Peer Reviewed by IEEE Approved Organization.

Parker, Glenn and C.D. Johnson, “Use of Reduced-Order Observers for Feedback Control in Large Wind Turbines May Reduce Fatigue Damage from Excitement of Flexible Modes,” Proc. of the 42nd IEEE Southeastern Symposium on System Theory; Univ. of Texas at Tyler, Tyler, TX; March 7,8,9, 2010; pp. 85-89; Peer Reviewed by IEEE Approved Organization.

Johnson, C. D., “Computation of a Matric Convolution-Integral that Arises in Discrete-Time DAC Theory, and Similarly in Discrete/Continuous (D/C) Control Theory,”  Proc. 41st Southeastern Symposium on System Theory,University of Tennessee Space Institute Tullahoma, TN, USA, March 15-17, 2009, pp. 291-294. Peer reviewed.

Hunt, A., C. D. Johnson, “On the Dual-Kernel, Matric Convolution Integral in Discrete / Continuous Control Theory; Exact, Explicit, Closed-Form Expressions for Some Simple Cases,” Proc. 41st Southeastern Symposium on System Theory, University of Tennessee Space Institute Tullahoma, TN, USA, March 15-17, 2009,  pp. 295-299.  Peer reviewed.

Carroll, Y., C. D. Johnson “Optimal Sequential-Decisions in the Presence of Exogenous-Inputs with Structured Variations,”  Proc. 41st Southeastern Symposium on System Theory, University of Tennessee Space Institute Tullahoma, TN, USA, March 15-17, 2009,  pp. 300-305.  Peer reviewed.

Hannan, M. R., C. D. Johnson, “Simulation and Animation of Coffee Sloshing in a Cup;
A Testbed for Control Design,”  Proc. 41st Southeastern Symposium on System Theory, University of Tennessee Space Institute Tullahoma, TN, USA, March 15-17, 2009, pp.317-318.  Peer reviewed.

Parker, G. A., C. D. Johnson, “Decoupling Linear Dynamical Systems Using Disturbance
Accommodation Control Theory,”  Proc. 41st Southeastern Symposium on System Theory, University of Tennessee Space Institute Tullahoma, TN, USA, March 15-17, 2009,  pp.199-204.  Peer reviewed.

Parker, G. A., C. D. Johnson, “Improved Speed Regulation and Mitigation of Drive-Train Torsion Fatigue in Flexible Wind Turbines, Using Disturbance Utilization Control: Part One,” Proc. 41st Southeastern Symposium on System Theory, University of Tennessee  Space Institute Tullahoma, TN, USA, March 15-17, 2009,  pp. 171-176. Peer reviewed.

Parker, G. A., C. D. Johnson, “Improved Speed Regulation and Mitigation of Drive-Train Torsion Fatigue in Flexible Wind Turbines, Using Disturbance Utilization Control: Part Two,” Proc. 41st Southeastern Symposium on System Theory, University of Tennessee Space Institute Tullahoma, TN, USA, March 15-17, 2009,  pp. 177-183.  Peer reviewed.

Nixon, D. D., C. D. Johnson, “Numerical Evaluation of the “Dual-Kernel, Counter-flow” Matric Convolution Integral that Arises in Discrete/Continuous (D/C) Control Theory,” Proc. 41st Southeastern Symposium on System Theory, University of Tennessee Space  Institute Tullahoma, TN, USA, March 15-17, 2009,  pp. 285-290.  Peer reviewed.

Johnson, C.D.  “A MIMO Transfer-Function Approach to the Design of “Bumpless” Type and “Smooth-Bumpless” Type Discrete/Continuous (D/C) Controllers”, Proc. 40th IEEE Southeastern Symposium on System Theory,Univ. of New Orleans, New Orleans, LA, March 2008. 

Johnson, C.D.  “Real-Time Disturbance-Observers; Origin and Evolution of the Idea; Part 1: The Early Years”,Proc. 40th IEEE Southeastern Symposium on System Theory, Univ. of New Orleans, New Orleans, LA, March 2008.