Semi-active friction tendons for vibration contro lof space structures

HERNÁN GARRIDO; OSCAR CURADELLI; DANIEL AMBROSINI

JOURNAL OF SOUND AND VIBRATION

ACADEMIC PRESS LTD-ELSEVIER SCIENCE LTD

Lugar: Amsterdam; Año: 2014

0022-460X

Semi-activevibrationcontrolsystemsarebecomingpopularbecausetheyofferboththe reliability ofpassivesystemsandtheversatilityofactivecontrolwithouthighpower demands.Inthiswork,anewsemi-activecontrolsystemisproposedandstudied numerically.Thesystemconsistsofvariable-frictiondamperslinkedtothestructure through cables.Auxiliarysoftspringsinparallelwiththesefrictiondampersallowthemto return totheirinitialpre-tensionedstate.Usingcablesmakesthesystemsuitablefor deployable,flexibleandlightweightstructures,suchasspacestructures(spacecraft). A controlsystemwiththreecontrollawsappliedtoasingle-degree-of-freedomstructure is studied.TwooftheselawsarederivedbyusingLyapunovtheory,whereasthethirdone is developedheuristically.Inordertoassesstheperformanceofthecontrolsystem,a parametric studyiscarriedoutthroughnumericalsimulations.Anapplicationofthe proposed methodtomulti-degree-of-freedomstructuresisalsopresentedanddemon- stratedthroughanumericalexample.Thesysteminsemi-activemodeismoreeffective than inpassivemodeanditseffectivenessislesssensitivetolossofpre-tension.