This paper presents the design and digital implementation of an inverse-optimal-control on a power conversion circuit by means of mixed-signal simulation. After selecting a proper Lyapunov-function-candidate, the prop...
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ISBN:
(纸本)9781467371216
This paper presents the design and digital implementation of an inverse-optimal-control on a power conversion circuit by means of mixed-signal simulation. After selecting a proper Lyapunov-function-candidate, the proposed controller is codified in VHDL and converted into PSpice components by using conversion tools allowing mixed-signal simulation in OrCAD-CADENCE (R). Simulation results show good performance for the proposed controller regulating the output-voltage of a DC-DC Boost power converter. Further analysis on cost-functional allows to verify energy-saving for accomplishing error reduction in the proposed control compared with a conventional (Proportional-Integral) technique. Also, the precision of results is highly affected by resolution of digital representation of signals. Experimental verification of simulation predictions by hardware synthesis is part of current ongoing work.
This document presents a designmethodology for building applications based on the Universal Numerical control (UNC) reference architecture based on open systems developed on previous research works. UNC architecture ...
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This document presents a designmethodology for building applications based on the Universal Numerical control (UNC) reference architecture based on open systems developed on previous research works. UNC architecture map the openness concept to the needs of countries in development which justification emerges from the need of acquiring low cost CNC technology and making retrofit of manual machine tool. The methodology discusses guidelines for the design documentation and mainly addresses the kind of information needed using design notations such as UML. The project was developed under a collaboration agreement between ITESM in Mexico and the Santa Catarina University in Brazil.
Based on the authors experience in the development of intelligent control (IC) applications, mainly in the cement production area, a methology to design Fuzzy Logic controllers is presented in this paper. Two alternat...
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Based on the authors experience in the development of intelligent control (IC) applications, mainly in the cement production area, a methology to design Fuzzy Logic controllers is presented in this paper. Two alternative approaches are suggested: the fuzzyftcation of a previously designed linear controller and the fuzzy implementation of the operator knowledge. Structural decisions and basic parameters are first assumed and final parameters are on-line tuned. The global procedure is iterative and some refinements based on the obtained practical results are required. Both approaches are applied in an industrial plant and some results are presented and discussed.
A methodology to design fuzzy logic controllers is presented in this paper. It is based on the authors experience in the development of intelligent control applications, mainly in the cement production area. Structura...
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ISBN:
(纸本)0780309081
A methodology to design fuzzy logic controllers is presented in this paper. It is based on the authors experience in the development of intelligent control applications, mainly in the cement production area. Structural decisions and parameters are first assumed and tuning parameters are on-line tuned. The global procedure is iterative and some refinements based on the obtained practical results are required.
The task of designing a robust process controller consists of determining the control algorithm that meets the system performance requirements across a broad range of operating conditions while recognizing the comprom...
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The task of designing a robust process controller consists of determining the control algorithm that meets the system performance requirements across a broad range of operating conditions while recognizing the compromises demanded by the available implementation vehicles. This design task generally involves an iterative procedure wherein the compromises forced on the designer and the performance demanded represent an infeasible set that must be negotiated upon until a resolution is achieved. In the chemical and refining industries this task is particularly challenging for two reasons. On the one hand, there is little freedom to change the basic process design in order to achieve feasibility. On the other hand, large levels of research and/or engineering effort to mathematically represent the process is normally not justifiable because of the fact that the number of processes of a given genre is small and so the cost is not distributed across a large number. The needs of our industry have forced a unified approach to control theory wherein the economy is incorporated in the fact that a single design procedure is utilized. In this paper we describe our work in developing such a unified approach to process control. Because of its generality, it is proposed as a potential solution to many of the current control problems encountered not only in our industry but across a broad class of industrial needs. In addition, we outline our current research efforts which will lead to the development of highly versatile and robust controllers whose structure changes to meet the performance requirements on-line in real time.
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