Metodologia para re-sintonia de controladores PID industriais

The present work has as objective to present a method of project and implementation of controllers PID, based on industrial instrumentation. An automatic system of auto-tunning of controllers PID will be presented, for systems of first and second order. The software presented in this work is applied in controlled plants by PID controllers implemented in a CLP. Software is applied to make the auto-tunning of the parameters of controller PID of plants that need this tunning. Software presents two stages, the first one is the stage of identification of the system using the least square recursive algorithm and the second is the stage of project of the parameters of controller PID using the root locus algorithm. An important fact of this work is the use of industrial instrumentation for the accomplishment of the experiments. The experiments had been carried through in controlled real plants for controllers PID implemented in the CLP. Thus has not only one resulted obtained with theoreticians experiments made with computational programs, and yes resulted obtained of real systems. The experiments had shown good results gotten with developed software

Metodologia de an��lise e diagn��stico de fratura em um componente automotivo sujeito a cargas c��clicas alternadas

The competitiveness of the trade generated by the higher availability of products with lower quality and cost promoted a new reality of industrial production with small clearances. Track deviations at the production are not discarded, uncertainties can statistically occur. The world consumer and the Brazilian one are supported by the consumer protection code, in lawsuits against the products poor quality. An automobile is composed of various systems and thousands of constituent parts, increasing the likelihood of failure. The dynamic and security systems are critical in relation to the consequences of possible failures. The investigation of the failure gives us the possibility of learning and contributing to various improvements. Our main purpose in this work is to develop a systematic, specific methodology by investigating the root cause of the flaw occurred on an axle end of the front suspension of an automobile, and to perform comparative data analyses between the fractured part and the project information. Our research was based on a flaw generated in an automotive suspension system involved in a mechanical judicial cause, resulting in property and personal damages. In the investigations concerning the analysis of mechanical flaws, knowledge on materials engineering plays a crucial role in the process, since it enables applying techniques for characterizing materials, relating the technical attributes required from a respective part with its structure of manufacturing material, thus providing a greater scientific contribution to the work. The specific methodology developed follows its own flowchart. In the early phase, the data in the records and information on the involved ones were collected. The following laboratory analyses were performed: macrography of the fracture, micrography with SEM (Scanning Electron Microscope) of the initial and final fracture, phase analysis with optical microscopy, Brinell hardness and Vickers microhardness analyses, quantitative and qualitative chemical analysis, by using X-ray fluorescence and optical spectroscopy for carbon analysis, qualitative study on the state of tension was done. Field data were also collected. In the analyses data of the values resulting from the fractured stock parts and the design values were compared. After the investigation, one concluded that: the developed methodology systematized the investigation and enabled crossing data, thus minimizing diagnostic error probability, the morphology of the fracture indicates failure by the fatigue mechanism in a geometrically propitious location, a tension hub, the part was subjected to low tensions by the sectional area of the final fracture, the manufacturing material of the fractured part has low ductility, the component fractured in an earlier moment than the one recommended by the manufacturer, the percentages of C, Si, Mn and Cr of the fractured part present values which differ from the design ones, the hardness value of the superior limit of the fractured part is higher than that of the design, and there is no manufacturing uniformity between stock and fractured part. The work will contribute to optimizing the guidance of the actions in a mechanical engineering judicial expertise

Metodologia, Sistema de Codifica����o e Ferramenta de software para Modelagem de M��veis Modulados

On this research we investigated how new technologies can help the process of design and manufacturing of furniture in such small manufacturers in Rio Grande do Norte state. Google SketchUp, a 3D software tool, was developed in such a way that its internal structures are opened and can be accessed using SketchUp s API for Ruby and programs written in Ruby language (plugins). Using the concepts of the so-called Group Technology and the flexibility that enables adding new functionalities to this software, it was created a Methodology for Modeling of Furniture, a Coding System and a plugin for Google s tool in order to implement the Methodology developed. As resulted, the following facilities are available: the user may create and reuse the library s models over-and-over; reports of the materials manufacturing process costs are provided and, finally, detailed drawings, getting a better integration between the furniture design and manufacturing process

Controle sanit��rio e ambiental de um projeto de re��so em um complexo de pr��dios corporativos

The study that resulted in this dissertation was developed at OU RNCE PETROBRAS, in Natal, which implemented a project of rational use and reuse of water, including use of wastewater from a Sewage Treatment Plant (STP) already in place, diluted with water from own wells for irrigation of green area of the building complex corporate enterprise. Establish a methodology that can serve as guidelines for future projects controlled reuse of water like this was the objective of this research. Been proposed, implemented and evaluated three instruments of sanitary and environmental control: 1) adaptation of sewage treatment plant and quality control of the treated effluent 2) analysis of soil-nutrient interaction in the irrigated area, 3) knowledge of the local hydrogeology, especially with regard to the direction of flow of the aquifer and location of collection wells of Companhia de ��guas e Esgotos do Rio Grande do Norte (CAERN) situated in the surroundings. These instruments have proven sufficient and appropriate to ensure the levels of sanitary and environmental control proposed and studied, which were: a) control of water quality off the STP and the output of the irrigation reservoir, b) control of water quality sub surface soil and assessment of progress on soil composition, c) assessment of water quality in the aquifer. For this, we must: 1) establishing the monitoring plan of the STP and its effluent quality sampling points and defining the parameters of analysis, improve the functioning of that identifying the adequacy of flow and screening as the main factors of operational control, and increase the efficiency of the station to a relatively low cost, using additional filters, 2) propose, implement and adapt simple collectors to assess the quality of water percolating into the soil of the irrigated area, 3) determine the direction of groundwater flow in the area study and select the wells for monitoring of the aquifer.

Metodologia para rastreamento com modifica����o dos zeros e rejei����o de dist��rbio aplicada a sistemas incertos

Funda����o de Amparo �� Pesquisa do Estado de S��o Paulo (FAPESP)

Ensino e orienta����o para projeto de conversores CC-CC atrav��s de aplicativos em java

Conselho Nacional de Desenvolvimento Cient��fico e Tecnol��gico (CNPq)

Construir com os professores do 2�� ciclo pr��ticas letivas inovadoras: um projeto de pesquisa sobre o ensino do tema curricular 'alimenta����o humana'

O prop��sito neste texto �� divulgar um projeto de investiga����o que foi desenvolvido com professores do 2�� ciclo, no qual se utilizou uma metodologia do tipo investiga����o-a����o. Por interm��dio deste projeto foi poss��vel avaliar o impacto do uso de estrat��gias do Ensino por Pesquisa (EPP), com vista ao desenvolvimento de novas compet��ncias cient��fico-did��ticas (atitudes e saberes). Tais estrat��gias foram desenvolvidas com base em preceitos da Nova Did��tica e no ��mbito de um programa de forma����o. Os dados levantados e analisados mostraram que esse tipo de metodologia contribui para a supera����o de dificuldades de aprendizagem inerentes a processos de forma����o profissional (inicial e continuada), como a de aprender por meio do trabalho cooperativo na Escola.

Aplica����o do m��todo B ao projeto formal de software embarcado

This work shows a project method proposed to design and build software components from the software functional m del up to assembly code level in a rigorous fashion. This method is based on the B method, which was developed with support and interest of British Petroleum (BP). One goal of this methodology is to contribute to solve an important problem, known as The Verifying Compiler. Besides, this work describes a formal model of Z80 microcontroller and a real system of petroleum area. To achieve this goal, the formal model of Z80 was developed and documented, as it is one key component for the verification upto the assembly level. In order to improve the mentioned methodology, it was applied on a petroleum production test system, which is presented in this work. Part of this technique is performed manually. However, almost of these activities can be automated by a specific compiler. To build such compiler, the formal modelling of microcontroller and modelling of production test system should provide relevant knowledge and experiences to the design of a new compiler. In ummary, this work should improve the viability of one of the most stringent criteria for formal verification: speeding up the verification process, reducing design time and increasing the quality and reliability of the product of the final software. All these qualities are very important for systems that involve serious risks or in need of a high confidence, which is very common in the petroleum industry

Projeto e implementa����o com chaveamento de reguladores fuzzy Takagi-Sugeno para um conjunto de pontos de opera����o

Conselho Nacional de Desenvolvimento Cient��fico e Tecnol��gico (CNPq)

Proposta para aprimoramento da metodologia e do processo de apura����o e an��lise de compatibilidade de indicadores da qualidade da energia el��trica em sistemas de distribui����o

Coordena����o de Aperfei��oamento de Pessoal de N��vel Superior (CAPES)

Planejamento e projeto de circuitos secund��rios de distribui����o de energia el��trica por meio de algoritmo busca tabu

Coordena����o de Aperfei��oamento de Pessoal de N��vel Superior (CAPES)

An��lise e proposta de elabora����o de r��tulo de embalagem de agrot��xicos (herbicida) por meio de metodologia de design ergon��mico

Coordena����o de Aperfei��oamento de Pessoal de N��vel Superior (CAPES)

Forma����o continuada de educadores no Estado do Amap��: o projeto encontro pedag��gico dos munic��pios

Coordena����o de Aperfei��oamento de Pessoal de N��vel Superior (CAPES)

O professr coordenador das escolas p��blicas estaduais paulistas: an��lise das condi����es de trabalho e a contru����o do projeto pol��tico-pedag��gico

Coordena����o de Aperfei��oamento de Pessoal de N��vel Superior (CAPES)

Matem��tica financeira: um enfoque da resolu����o de problemas como metodologia de ensino e aprendizagem

P��s-gradua����o em Educa����o Matem��tica - IGCE