Abstract
In this paper, the robust speed control of an induction motor is investigated, and a parameter-dependent model is addressed. The proposed scheme includes the feedback of states and the integral of the tracking error. In practice, considering the specification of the drive circuit, the saturation phenomenon of control signals is addressed. It is noted that the saturated signal is represented as a perturbed signal, which can be further investigated to determine the achieved robustness. Regional stability and H∞ performance are discussed in this paper, where the derivations of feedback gains are formulated in terms of linear matrix inequalities (LMIs). To evaluate the control performances, a DSP-based scheme for an induction motor was set up. Experimental results, associated with versatile command profiles and load conditions, show that the proposed system achieves satisfactory performance from the viewpoint of tracking accuracy and disturbance rejection.
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