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A numerical approach for computing discrete singular linear quadratic (SLQ) optimal controller from input-output data is proposed. The method is applicable whenever the plant is open-loop stable. The major advantages of the method are three folds. First, it involves an output feed- back control law; hence, no state estimation is needed for implementation. Second, the computation of this controller can be conducted without explicit identification of the plant model parameter. Third, the complicated mathematical transformations of the model-based SLQ design is avoided.
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