Rodrigo Rodrigues Sumar

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0957-4174/$ see front matter 2009 Elsevier Ltd. A doi:10.1016/j.eswa.2009.05.042 * Corresponding author. Tel./fax: +55 3271 1345. E-mail addresses: leandro.coelho@pucpr.br (L.S. (M.W. Pessôa), sumar@das.ufsc.br (R. Rodrigues (A. Augusto Rodrigues Coelho). It is well-known that conventional control theories are widely suited for applications where the(More)
Despite the popularity of PID (Proportional-Integral-Derivative) controllers, their tuning aspect continues to present challenges for researches and plant operators. Various control design methodologies have been proposed in the literature, such as auto-tuning, self-tuning, and pattern recognition. The main drawback of these methodologies in the industrial(More)
Despite the popularity, the tuning aspect of PID controllers is a challenge for researches and plant operators. Various control design methodologies have been proposed in the literature such as auto-tuning, self-tuning and pattern recognition. The main drawback of these methodologies in the industrial environment is the number of tuning parameters to be(More)
Estimating the electrical and mechanical parameters involved in three-phase induction motors is frequently employed to avoid measuring every variable in the process. Among mechanical parameters, speed is an important variable: it is involved in control, diagnosis, condition monitoring, and can be measured or estimated by sensorless methods. These(More)
A new design for a model-free learning adaptive control (MFLAC), based on pseudo-gradient concepts with compensation using neural network, is presented in this paper. A radial basis function neural network using differential evolution optimization technique is applied to the control design. Motivation for developing a new approach is to overcome the(More)
The use of accumulation vessels – production separators, electrostatic treaters, etc – as filters of feed oscillations has been proposed to optimize the offshore treatment of crude oils. This change in philosophy of control suggests letting the level to oscillate within certain limits – called band – for which existing algorithms require the measurement of(More)
This tutorial shows engineers the basics for implementing an embedded system in FPGA XILINX: Zynq. The architecture of this powerful System on Chip (based on ARM® Cortex TM A9) will be shown as well as the step the step to create a custom embedded system and write code for it. Participants will thus understand the various software and techniques XILINX(More)
Three design methodologies, such as Internal Model Control (IMC), Generalized Predictive Control (GPC) and Two Degree-of-Freedom (TDF), for automatic tuning of PID parameters, have been reviewed, compared and applied to a laboratory plant with dead time. Tuning parameters are derived as a First-Order-Plus-Dead-Time (FOPDT) model. Dead time compensating PID(More)
 Artificial immune system (AIS) approaches, which are used in this work, are learning and optimization methods that can be applied to find the solution of many types of optimization problems. This paper presents an AIS approach applied to optimize the design of an incremental discrete variable structure controller (VSC) for minimizing the generalized(More)
Recently, the discrete variable structure controllers (VSCs) for nonlinear systems has received some attention. These VSCs are formulated for the systems with different kinds of uncertainties using switching or nonswitching types of techniques. The performance of these controllers depends not only on the control structure but also on the values of the(More)
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