Renato Alves Borges

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This paper deals with the control of processes having recycle streams. These processes can be modeled as state delayed systems. In this work the problem of robust design of an observed-based controller for these systems is presented. The system is assumed to have norm-bounded uncertainties which are independent in every matrix involved in its state space(More)
— In this paper, the problem of robust filter design for uncertain continuous-time systems is investigated in the context of finite time stability. The filter is obtained in order to guarantee that the augmented system is finite time stable. The system is considered time varying with the parameters modeled by a polytope. The design conditions obtained by(More)
— In this paper, the problem of robust filter design for networked systems with time-varying sampling rate is investigated. The design conditions are obtained by using the Lyapunov theory and the Finsler's Lemma. A robust filter, that minimizes an upper bound to the H ∞ performance of the estimation error, is obtained as the solution of an optimization(More)
— In this paper, the problem of robust filter design for time-varying discrete-time polytopic systems with bounded rates of variation is investigated. The design conditions are obtained by using a parameter-dependent Lyapunov function and the Finsler's Lemma. A robust filter, that minimizes an upper bound to the H ∞ performance of the estimation error, is(More)
This paper addresses the voltage regulation of dual active bridge converters based on robust PI controllers. The plant model presents a dependence on an uncertain parameter, which defines the operation condition, motivating the design of robust PI controllers for this application. Linear matrix inequalities are then used to synthesize control gains which(More)