www.gusucode.com > robust 案例源码程序 matlab代码 > robust/SecondOrderStepResponseWithKnownNaturalPeriodAndOvershooExample.m
%% Second-Order Step Response With Known Natural Period and Overshoot % Create a requirement that specifies a second-order step response with a % natural period of 5 seconds, and a 10% overshoot. Create the requirement % for the step response from a signal named |'r'| to a signal named |'y'|. %% % Copyright 2015 The MathWorks, Inc. Req = TuningGoal.StepResp('r','y',5,10); %% % When you use this requirement to tune a control system % model, |T|, the natural period 5 is taken to be expressed in the % prevailing units of the control system. For example, if |T| is a |genss| % model and the property |T.TimeUnit| is |'seconds'|, then this requirement % specifies a target natural period of 5 seconds for the response from the % input |'r'| to the output |'y'| of |'T'|. % % The specified parameters of the response is converted into a reference % state-space model stored in the |ReferenceModel| property of the % requirement. refsys = tf(Req.ReferenceModel) %% % As expected, |refsys| is a second-order model. % % Examine the requirement. The |viewSpec| command displays the target % response, which is the step response of the reference model. viewSpec(Req); %% % The dashed line shows the target step response specified by this % requirement, a second-order response with 10% overshoot and a natural period of five seconds.