Data-driven controller design and control performance assessmentby using input-output data in normal operation

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Controller tuning method that optimizes disturbance attenuation with a specified stability margin by using a plant transient response such as step response is presented. Features are that mathematical models are not necessary and that a parameter of the performance index can be easily determined by engineers. Design method of fixed order H ∞ controllers by using frequency response data is also presented. Further study is necessary for control performance assessment.