摘要
Thispaperpresentsapressureobserverbasedadaptiverobustcontroller(POARC)forposturetrajectorytrackingofaparallelmanipulatordrivenbythreepneumaticmuscleswithoutpressuresensors.Duetomodelerrorsofthestaticforcesandfrictionforcesofpneumaticmuscles,simplifiedaverageflowratecharacteristicsofvalves,unknowndisturbancesofentiresystem,andunmeasuredpressures,thereexistrathersevereparametricuncertainties,nonlinearuncertaintiesanddynamicuncertaintiesinmodelingoftheparallelmanipulator.Anonlinearpressureobserverisconstructedtoestimateunknownpressuresonthebasisofasingle-input-single-output(SISO)decouplingmodelthatissimplifiedfromtheactualmultiple-input-multiple-output(MIMO)couplingmodeloftheparallelmanipulator.Then,anadaptiverobustcontrollerintegratedwiththepressureobserverisdevelopedtoaccomplishhighprecisionposturetrajectorytrackingoftheparallelmanipulator.TheexperimentalresultsindicatethatthesystemwiththeproposedPOARCnotonlyachievesgoodcontrolaccuracyandsmoothmovementbutalsomaintainsrobustnesstodisturbances.
出版日期
2007年12月22日(中国期刊网平台首次上网日期,不代表论文的发表时间)