Michigan statistical abstract.

Imprint varies : Ann Arbor : University of Michigan Press, 1996-

Research publication /

Title from cover.

Technical bulletin /

Each no. has also a distinctive title.

Control and chaos for vibro-impact and non-ideal oscillators

In the paper, we discuss dynamics of two kinds of mechanical systems. Initially, we consider vibro-impact systems which have many implementations in applied mechanics, ranging from drilling machinery and metal cutting processes to gear boxes. Moreover, from the point of view of dynamical systems, vibro-impact systems exhibit a rich variety of phenomena, particularly chaotic motion. In this paper, we review recent works on the dynamics of vibro-impact systems, focusing on chaotic motion and its control. The considered systems are a gear-rattling model and a smart damper to suppress chaotic motion. Furthermore, we investigate systems with non-ideal energy source, represented by a limited power supply. As an example of a non-ideal system, we analyse chaotic dynamics of the damped Duffing oscillator coupled to a rotor. Then, we show how to use a tuned liquid damper to control the attractors of this non-ideal oscillator.

Control and chaos for vibro-impact and non-ideal oscillators

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

On a nonlinear and chaotic non-ideal vibrating system with shape memory alloy (SMA)

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Tm-afm nonlinear motion control with robustness analysis to parametric errors in the control signal determination

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

DYNAMICAL JUMP ATTENUATION IN A NON-IDEAL SYSTEM THROUGH A MAGNETORHEOLOGICAL DAMPER

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Low-Dimensional Modelling for optimal streaks in the blasius boundary layer

This paper is concerned with the low dimensional structure of optimal streaks in the Blasius boundary layer. Optimal streaks are well known to exhibit an approximate self-similarity, namely the streamwise velocity re-scaled with their maximum remains almost independent of both the spanwise wavenumber and the streamwise coordinate. However, the reason of this self-similar behavior is still unexplained as well as unexploited. After revisiting the structure of the streaks near the leading edge singularity, two additional approximately self-similar relations involving the velocity components and their wall normal derivatives are identified. Based on these properties, we derive a low dimensional model with two degrees of freedom. The comparison with the results obtained from the linearized boundary layer equations shows that this model is consistent and provide good approximations.

Projects in the hardware research group of the department of computer science of the University of Illinois,

Illustrations, p. 30-52, numbered as leaves.

Report of the survey of courses and curricula of the University of Illinois at Champaign-Urbana /

W.S. Monroe, Chairman.

Report of the committee to study the needs for recreational facilities on the University of Illinois campus Champaign-Urbana, Illinois.

Mode of access: Internet.

University of Illinois directory, listing the 35,000 persons who have ever been connected with the Urbana-Champaign departments, including officers of instruction and administration and 1397 deceased,

Mode of access: Internet.

Inventory of building and related needs as requested by colleges, schools, and departments of the University of Illinois, Urbana and Chicago Illinois.

Mode of access: Internet.

Agricultural education as a factor in developing useful men. An address by Fred H. Rankin ... before the thirty-third annual meeting of the Kansas state board of agriculture, Topeka, Kan., January 14, 1904. Also, Circular of information, College of agriculture, University of Illinois, Urbana, 1904.

Cover-title.