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Toward the synthesis of state-space controllers, a neural-genetic model based on the linear quadratic regulator design for the eigenstructure assignment of multivariable dynamic systems is presented. The neural-genetic model represents a fusion of a genetic algorithm and a recurrent neural network (RNN) to perform the selection of the weighting matrices and the algebraic Riccati equation solution,...
The indirect estimation of the alumina bulk concentration in the electrolyte is important to keep the right operational condition that avoids anode effects and maximizes current efficiency. Vertical Stub Soderberg (VSS) Side Break has a feed cycle every two hours with a fix amount of alumina and the actual feed adjustment is done in a manual daily basis.These feed conditions are very hard to control;...
The anode effect that occurs in electrolytic smelter pot is responsible for gases such as PFC's. These gases contributeto the greenhouse effect, and in addition jeopardizes its productive capacity. From the voltage (output) and current (input) signals and based on systems identification theory, the ARX models of the electrolytic smelter pot are built to represent the steady state operation and the...
Smelters have a difficult task in the reduction of the green house gas emission (GHG) by decreasing anode effect. When alumina buck concentration reaches critical levels an anode effects occurs and express itself as a suddenly increase in voltage. Vertical Stub Soderberg (VSS) Side Break pots had no improvements on alumina control in the past decade due the complexity of the problem. The pot is fed...
A method to design Indirect Measurement Systems (IMS) based on ouput-error (OE) models is the main issue of this article. The general procedure design is evaluated on non-invasive temperature estimation of an object that is inside of a sterilizer oven. The system performance is evaluated in terms of distributed temperatures sources: (a) actuator temperature source that is controlled by the electric...
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