design, it is necessary to assume some basic types of test inputs so that the performance of a system can be evaluated.Р6РTypical Test SignalsРTest signalРStep-functionРRamp-functionРParabolic-functionР7РAn Important Performance Specification of Steady-state Response - Steady-state ErrorРDefined by output:РDefined by input:РIn reality, when time lasts more than 4~5 times of the time constant of the ?system, we can think that the steady-state is reached.Р8РSteady-state ErrorРFor unit feedback system:Р9РCalculation of the Steady-state ErrorРLaplace Final-value Theorem:РIf the Laplace transform ofРisР, and ifРdoesРnot have any pole whose real part is zero or positive, thenР10РExample - find the final value of the following systemsР(1)Р(2)Р(1)Р(2)РLaplace final-value theorem?is not applicable.
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