Active Control of Structures by Andre Preumont, Kazuto Seto

By Andre Preumont, Kazuto Seto

With lively keep watch over of buildings , international pioneers current the cutting-edge within the thought, layout and alertness of lively vibration keep watch over. because the call for for prime functionality structural structures raises, so will the call for for info and innovation in structural vibration regulate; this booklet presents a good treatise of the topic that would meet this requirement. The authors introduce energetic vibration keep watch over by using clever fabrics and constructions, semi-active keep an eye on units and quite a few suggestions strategies; they then talk about subject matters together with equipment and units in civil buildings, modal research, lively keep watch over of high-rise structures and bridge towers, lively tendon keep an eye on of cable constructions, and lively and semi-active isolation in mechanical buildings.

energetic keep an eye on of buildings:

  • Discusses new sorts of vibration regulate equipment and units, together with the newly built reduced-order actual modelling technique for structural keep an eye on;
  • Introduces triple high-rise constructions hooked up by means of energetic keep watch over bridges as devised via Professor Seto;
  • Offers a layout approach from modelling to controller layout for versatile constructions;
  • Makes prolific use of functional examples and figures to explain the subjects and know-how in an intelligible demeanour.

Show description

Read or Download Active Control of Structures PDF

Similar system theory books

Long-range Interactions, Stochasticity and Fractional Dynamics: Dedicated to George M. Zaslavsky (1935 - 2008)

In reminiscence of Dr. George Zaslavsky, "Long-range Interactions, Stochasticity and Fractional Dynamics" covers the hot advancements of long-range interplay, fractional dynamics, mind dynamics and stochastic idea of turbulence, each one bankruptcy was once written by means of tested scientists within the box. The booklet is devoted to Dr.

Recursive Estimation and Time-Series Analysis: An Introduction for the Student and Practitioner

This can be a revised model of the 1984 e-book of an identical identify yet significantly changed and enlarged to deal with the advancements in recursive estimation and time sequence research that experience happened during the last zone century. additionally over this time, the CAPTAIN Toolbox for recursive estimation and time sequence research has been built by way of my colleagues and that i at Lancaster, to be used within the MatlabTM software program surroundings (see Appendix G).

Critical Transitions in Nature and Society

How will we clarify the remarkably abrupt alterations that usually happen in nature and society--and will we expect why and once they take place? This booklet bargains a accomplished creation to severe transitions in advanced systems--the radical adjustments that occur at tipping issues whilst thresholds are handed.

New Trends in Nonlinear Dynamics and Control, and their Applications

A range of papers exploring a large spectrum of latest traits in nonlinear dynamics and keep watch over, similar to bifurcation keep watch over, kingdom estimation and reconstruction, research of habit and stabilities, dynamics of nonlinear neural community versions, and numerical algorithms. The papers concentrate on new principles and the newest advancements in either theoretical and utilized learn themes of nonlinear regulate.

Extra info for Active Control of Structures

Example text

The departure rate from the open-loop poles) is controlled by the fraction of modal strain energy in the active element. This result is very useful for the design of active trusses. The active strut should be located to maximize νi for the critical modes of the structure. Note that νi is readily available from finite element software. In summary, the active strut placement can be made from inspection of the map of modal strain energy in the finite element model. Once the active strut location has been selected, a modal analysis of the truss including the active strut gives the open-loop poles ± jωi , and a modal analysis after removing the active strut gives the open-loop zeros ± j zi .

This result is very useful for the design of active trusses. The active strut should be located to maximize νi for the critical modes of the structure. Note that νi is readily available from finite element software. In summary, the active strut placement can be made from inspection of the map of modal strain energy in the finite element model. Once the active strut location has been selected, a modal analysis of the truss including the active strut gives the open-loop poles ± jωi , and a modal analysis after removing the active strut gives the open-loop zeros ± j zi .

The total extension of the active strut is related to the global coordinate system of the truss by = bT x. bT δx. 104) [x˙ T Mδ x˙ − xT K δx − f bT δx]dt = 0. 102), M¨x + (K + bbT K a )x = bK a ga u. 107) In this formula, K is the stiffness matrix of the truss without the active strut and bbT K a is the contribution of the active strut to the global stiffness matrix. The mass of the active strut can be added to M if necessary; the damping term has been omitted for simplicity. 21). 4 4 In thermal problems, the thermal deformations may be computed by applying a set of self-equilibrated thermal loads K a α T, where α is the thermal expansion coefficient and T the temperature difference.

Download PDF sample

Rated 4.80 of 5 – based on 23 votes