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This paper introduces a robust methodology for autotuning design parameters in the EPSAC (Extended Prediction Self-Adaptive Control) approach to MPC (Model based Predictive Control). The method requires from the user solely a well-chosen sampling period of the process and, in case of process with time delay, the amount of delayed samples. The main design parameter, the prediction horizon, is related...
In this paper, closed loop performance of a system with hard nonlinear limitations is analyzed. In order to adequately control such a challenging process, an Internal Model Control strategy has been implemented. The controller has been applied to a real time process described by a radio satellite antenna. The performance of the closed loop has been evaluated by changing the natural frequency and the...
The paper discusses the application of a direct adaptive controller to a flow controlled artificial ventilation problem. The case study focuses on patients diagnosed with Chronic Obstructive Pulmonary Disease (COPD), which require artificial/mechanical ventilation. The controller ensures peak pressures below critical values, by manipulating the flow delivered by the ventilator. The simulation study...
High purity 13C isotope is widely used in numerous areas of medicine, including tests to evaluate metabolism problems, ulcer diagnostics, studies of amino-acids kinetics and especially to highlight metabolic changes in the human brain that help diagnose earlier important diseases such as Alzheimer and other neuropsychiatric abnormalities. It is for this particular reason that efficient methods for...
This paper introduces an extension of the Internal Model Control algorithm for efficient disturbance rejection. The approach is based on ideas from model based predictive control and diophantine equation derivation. As an illustration of the power of the extension, an example from the process industry is borrowed, namely a drum boiler. The process is challenging for control since it has an integrator...
Time delays occur frequently in process control systems and uncertainties regarding modeling of such phenomena limit the degree of freedom of the designed controllers. The problem is even more acute when dealing with multivariable systems. To overcome the difficulties in the controller design, Smith predictor control schemes are frequently used. The paper proposes a simple, yet efficient, novel control...
Fractional order control has been used intensively over the last decade in the control of various plants, being considered to enhance the closed loop performance, especially for time delay processes. In this paper, a fractional order PI controller is designed for the temperature control in a chemical reactor. The closed loop performance is evaluated and compared with a simple PI controller. The design...
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