Erratum: “Measures of Robustness for Uncertain Time-Delay Linear Systems” [ASME Journal of Dynamic Systems, Measurement, and Control, 1995, 117(4), pp. 633-635]

1996 ◽  
Vol 118 (1) ◽  
pp. 65-65
Author(s):  
Said Oucheriah
Keyword(s):  
Time Delay ◽  
Linear Systems ◽  
Dynamic Systems ◽  
Asme Journal ◽  
Uncertain Time ◽  
And Control ◽  
Measurement And Control

Extension and Simplification of Salukvadze’s Solution to the Deterministic Nonhomogeneous LQR Problem

1998 ◽  
Vol 123 (1) ◽  
pp. 146-149
Author(s):  
R. D. Hampton ◽  
C. R. Knospe ◽  
M. A. Townsend
Keyword(s):  
Dynamic Systems ◽  
Variational Calculus ◽  
Linear Quadratic Regulator ◽  
Linear Quadratic ◽  
Matrix Methods ◽  
Lqr Problem ◽  
Asme Journal ◽  
Analytic Design ◽  
And Control ◽  
Measurement And Control

In a previous paper (Hampton, R. D., et al., 1996, “A Practical Solution to the Deterministic Nonhomogeneous LQR Problem,” ASME Journal of Dynamic Systems, Measurement, and Control, Vol. 118, pp. 354–360.) the authors presented a solution to the nonhomogeneous linear-quadratic-regulator (LQR) problem, for the case of known, deterministic, persistent (“non-dwindling”) disturbances. The authors used variational calculus and state-transition-matrix methods to produce an optimal matric solution, for bounded determinist forcing terms. A restricted version of this problem (treating dwindling disturbances) was evidently first investigated by Salukvadze, M. E., 1962, “Analytic Design of Regulators (Constant Disturbance),” Automation and Remote Control, Vol. 22, No. 10, Mar., pp. 1147–1155, using a differential-equations approach. The present paper uses Salukvadze’s approach to extend his work to the case of non-dwindling disturbances, with cross-weightings between state- and control vectors, and pursues the solution to the same form reported previously in Hampton et al.

Lateral and Longitudinal Dynamic Behavior and Control of Moving Webs

1993 ◽  
Vol 115 (2B) ◽  
pp. 309-317 ◽  
Author(s):  
G. E. Young ◽  
K. N. Reid
Keyword(s):  
Dynamic Analysis ◽  
Dynamic Behavior ◽  
Dynamic Systems ◽  
Pivotal Role ◽  
Historical Perspectives ◽  
Longitudinal Dynamic ◽  
Primary Direction ◽  
And Control ◽  
Measurement And Control

A web refers to any material in continuous flexible strip form which is either endless or very long compared to its width, and very wide compared to its thickness. This paper discusses the dynamic analysis and control of the lateral and longitudinal motions of a moving web which correspond to fluctuations perpendicular and parallel, respectively, to the primary direction of web transport. Historical perspectives are provided, from the early work of Osborne Reynolds in the late 1800s to current research. An overview of the control of both lateral and longitudinal web motion, which includes the control of tension, is presented. Present limitations in understanding and controlling lateral and longitudinal web behavior are discussed. The Journal of Dynamic Systems, Measurement, and Control has played a pivotal role in the advancement of research in this area.

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