简介:Toeffectivelyreducethedamagetopeopleanddevicesincivildefenseengineeringsubjectedtoblastshock,ablastshockisolationsystemwithmagnetorheologicalfluiddampers(MRFD)isproposed.MRFDcanprovidecontinuouslyadjustableCoulombfrictionandhasmanyadvantagesforsemi-activecontrol.NumericalsimulationofthisisolationsystemisfinishedusingMatlabsimulinktoolbox.Generalsemi-activecontrolalgorithmsareconsidedbasedoninstantaneousoptimalactivecontrolalgorithm.Andtheresultsindicatethattheshockisolationsystemcanworkefficiently,decreasingabout93%ofthepeakaccelerationoftheisolationfloor.