Tiago Roux Oliveira

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An output-feedback sliding mode controller using monitoring functions was recently introduced for linear uncertain single-input-single-output (SISO) systems with unknown control direction. Here, a generalization is developed for multivariable systems with strong nonlinearities. The monitoring scheme is extended to handle the uncertainty of the plant high(More)
This work addresses the design of a sliding mode tracking controller for single-input-single-output (SISO) uncertain linear plants with relative degree one and unknown sign of the high frequency gain, i.e., the control direction is considered unknown. The goal is to achieve global exact tracking using only output-feedback. A periodic switching function is(More)
This paper considers the model reference tracking control for a class of uncertain nonlinear systems, based on sliding mode and output-feedback. No particular growth condition is imposed on the nonlinearity. Moreover, the design does not assume the prior knowledge of the control direction. For plants of arbitrary relative degree, global or semi-global(More)