文档介绍：Chapter6ParameterIdentificationFromStepResponseLiShaoyuanE-mail:OutlineParameterIdentificationfromStepResponseTheoreticalStep-ResponseExpressionsClassicalmethodsforopenloopsteptestLogMethodTwoPointsMethodAreaMethodLeastSquaresMethodsClassicalClosed-:-ResponseExpressionsFirst-order-plus-time-delayParameters:K,τ,-order-plus-time-delayParameters:K,τ1,τ2,,twopoles,plustimedelayParameters:K,τ1,ξ,τ2,,aplotofthetransformationofthestep-responsedataagainsttimetshouldbeastraightlinewithaslopeof-1/τ,andaninterceptontheordinateofL/,thisstraightlinewillmeetthet-axisatthepointt=-stategainTimeConstantτandTimeDelayL:TwoPointsMethody(∞)%(t)T/3+LT/2+++LT++L2T+Lt1andt2,%%puteareaA1understepuptothetimeTarThanTandLcanbeestimatedasLeastSquareMethodForOpenLoopStepTest