Fault detection filter and fault accommodation controller design for uncertain systems

Model-based Fault Detection (FD) and Fault Accommodation (FA) approaches have been applied in a variety of cases. We propose several techniques to include uncertainties in the design process. First, we focus on the design of the Fault Detection Filter (FDF) and Fault Accommodation Controller (FAC) for Markovian Jump Linear Systems (MJLS). The MJLS framework allows us to include the network behavior (packet loss) during the design of the FDF and FAC.Second, we propose an FDF and FAC design for the MJLS, under the assumption that the Markov chain mode is not directly accessible. Since we are using the MJLS framework to model the network behavior, the assumption that the network state is not instantly accessible is useful because from a practical standpoint this is a truthful assumption. Third, from the results presented for the MJLS framework, we provided follow-up results using Lur'e Markov Jump System. This is compelling since on some occasions the non-linear behavior cannot be ignored. Therefore, applying the Lur'e MJS framework allows us to consider the same assumptions from MJLS, but now adds the non-linearities. Fourth, we propose the design Gain-Scheduled FDF and FAC for Linear Parameter Varying (LPV) systems, under the assumption that the schedule parameter is not directly acquired. We assume that the schedule parameter is subject to additive noise. This imprecision is included during the design, using change of variables and multi-simplex techniques. Finally, throughout the thesis, we provide some numerical examples to illustrate the viability of the proposed approaches

Appying Markovian jump linear system solutions in the Vehicle-following problem

Orientador: Alim Pedro de Castro GonçalvesDissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Elétrica e de ComputaçãoResumo: Este trabalho tem como objetivo apresentar soluções de controle para o problema de seguimento de veículos. Foram apresentadas três principais soluções de controle, todas utilizando teoria de controle de sistemas sujeitos a saltos markovianos. A primeira e a segunda soluções propostas utilizam controladores por realimentação de saída de ordem completa e a terceira solução é uma estrutura que utiliza filtros observadores de estado e controladores por realimentação de estado simultaneamente. A diferença entre a primeira e a segunda soluções é a maneira como controlador lida com a ocorrência de falha de transmissão de medidas através da rede. A terceira solução foi proposta com o objetivo de adicionar robustez a incertezas paramétricas ao projetos de controle, visto que isso não pode ser realizado com os controladores por realimentação de saída utilizados na primeira e segunda soluções. Todos os projetos são obtidos por meio de desigualdades matriciais lineares e todos os controladores e filtros são da classe H1. E por fim é apresentada uma análise em relação à sensibilidade ao atraso fixo. Com os resultados obtidos pela análise dos testes de comportamento da norma H1 e simulações Monte Carlo, podemos afirmar que para os casos de estudo os controladores projetados com teoria de controle de sistemas sujeitos à saltos markovianos são superiores ao controlador clássico H1. A comparação entre a primeira e a segunda soluções mostra que, para um ruído específico, a segunda abordagem é mais confiável para o caso sem adição do atraso fixo, para o caso com atraso o inverso ocorre. A terceira abordagem apresenta resultados superiores à primeira e à segunda para o caso sem atraso, entretanto, ela é mais sensível ao atraso fixoAbstract: This work has as objective to propose controller solutions for the vehicle following problem. Three distinct control solutions were introduced, all of them use the Markovian Jump Linear Systems framework. The first and the second solution are based on a dynamic output feedback controller and the third solution is composed by a filter and state feedback controller. The primary difference between the first and second solution is the controller behavior when a network failure occurs. The third solution was proposed on order to add robustness to parametric uncertanties in the control design. All the controllers were obtained through optimization programs constrainedby Linear Matrix Inequalities and also all the controllers are within the H1 class. The sensibility of the proposed solution to the addition of fixed delay was also analysed. With the results obtained through H1 norm test and the Monte Carlo simulation, we can state that, for our case of study, the controllers designed using the Networked Control System always have an greater or equal performance when compared to those that do not take the transmission packet losses into consideration. The comparison between the first and the second solution has shown that the second solution is more reliable without the fixed delay. On the other handn for the case where the fixed delay in included the opposite occurs. The third solution had a better performance when compared to the other two is the case without the fixed delay, however, when the delay in added the performance is drastically affected, since the third solution has a higher sensibility to the fixed delayMestradoAutomaçãoMestre em Engenharia ElétricaCAPE

Fault Detection Filter for Discrete-Time Markov Jump Lur’e Systems

We present the design of H_inf Fault Detection Filter (FDF) for Discrete-time Markov Jump Lur'e Systems with bounded sector condition based on the use of Linear Matrix Inequality (LMI). A numerical example is presented to illustrate the effectiveness of the proposed approach

The efficacy of etodolac and ibuprofen, regarding gender, on pain, edema and trismus after impacted lower third molar surgery:a randomized prospective clinical split-mouth study

This study aimed to conduct a randomized prospective study about the efficacy of etodolac and ibuprofen on trismus, pain and edema regarding gender of patients submitted to impacted lower third molar teeth extraction. Thirty patients aging between 16 and 35 year-old were submitted to the exodontia of impacted lower third molars. During the postoperative period, patients received nine ibuprofen (600 mg) or etodolac (300 mg) pills via oral administration immediately after surgery and repeated doses every eight hours during three days. Patients were evaluated regarding pain, trismus and edema. Sixteen men and fourteen women participated of the study. No statistical difference was established regarding gender according to the evaluated parameters. However, etodolac use showed better results regarding pain, trismus and edema. Pain, edema and trismus after impacted third molars extraction were not influenced by gender

MECANISMOS DE RETIRADA FORÇADA DO ESTRANGEIRO DO TERRITÓRIO NACIONAL: A FAMÍLIA COMO CAUSA IMPEDITIVA DA EXPULSÃO

O artigo visa analisar as causas relacionadas à proteção familiar e aos interesses da criança que impedem a expulsão de estrangeiro do Brasil. Para isto, expõem-se brevemente as questões que autorizam um Estado a retirar indivíduo de seu território, bem como os mecanismos da deportação e da extradição. Discorre-se especificamente da expulsão e suas características legais. Por fim, são examinadas as hipóteses que impedem a expulsão de estrangeiro que tenha criado vínculos familiares no país, sob a ótica da legislação nacional e dasdecisões das Cortes Superiores brasileiras em questões polêmicas e inovadoras. A pesquisa é bibliográfica e documental

Fault Compensation Controller for Markovian Jump Linear Systems

In this paper, we tackle the fault-compensation controller in the context of Marko- vian Jump Linear Systems (MJLS). More specifically, we propose the design of H∞ Fault- Compensation Controllers under the MJLS formulation, which is provided in terms of linear matrices inequalities optimization problems. These particular controllers have as the main motivation the network communication loss which is inherent to any automation process. We present a numerical example of a coupled tank system, where a Monte Carlo simulation illustrates the feasibility of the proposed solution. The results show that the proposed approach is indeed a valuable alternative to compensate for the fault occurrence

A APLICABILIDADE DA JUSTIÇA RESTAURATIVA EM CRIMES GRAVES ENQUANTO COMPORTAMENTO PÓS-DELITIVO APTO A INFLUENCIAR A ATIVIDADE DE DOSIMETRIA DA PENA PELO JUIZ

Comumente utilizada no caso de crimes de menor potencial ofensivo e contravenções penais, procedimentos de Justiça Restaurativa podem também ser adotados com relação a delitos mais graves, com potencial de repercutir favoravelmente ao condenado no momento da determinada da medida de pena. Objetiva o artigo, então, através de metodologia dedutiva e revisão bibliográfica, apresentar, sem pretensão de esgotar a matéria, razões pelas quais a Justiça Restaurativa pode ser igualmente adotada como técnica alternativa nos delitos de maior gravidade e expor de que maneiras um eventual acordo restaurativo pode influenciar na dosimetria da pena à luz do ordenamento jurídico-penal brasileiro

Gain-Scheduled Controller for Fault Accommodation in Linear Parameter Varying Systems with Imprecise Measurements

We present the design of H∞ and H2 gain-scheduled fault-accommodation controllers for discrete-time Linear Parameter Varying systems. We design our conditions as Bilinear Matrix Inequalities, assuming that the scheduled parameters are imprecise, which is a commonly found characteristic of practical applications that happens due to measurement noise and inaccuracy on its estimation/acquisition procedure. The proposed solution is based on the use of a multi-simplex approach for solving the main conditions, which guarantees the stability of the system under imprecise measurements on the scheduling parameters. The efficacy of the proposed approach is illustrated with a numerical example

Enzymatic hydrolysis of salmon oil by native lipases: optimization of process parameters

In an attempt to concentrate the content of n-3 polyunsaturated fatty acids (n-3 PUFA) in the residual acylglycerol, salmon oil (n-3 PUFA content of 30.1%) was hydrolyzed with three kinds of native microbial lipases (Aspergillus niger, Rhizopus javanicus and Penicillium solitum). For each lipase, a response surface methodology was used to obtain maximum PUFA content and to optimize the parameters of enzymatic reactions with respect to important reaction variables; temperature (X1), amount of lipases (X2) and water/oil ratio (X3). Based on these results, optimal reaction conditions were established. Aspergillus niger lipase was the most effective in concentrating n-3 PUFA. The degree of hydrolysis (60%) led to an increase in the docosahexaenoic acid (DHA) content from 14.4% in the original oil to 34.0% (2.4-fold enrichment) in the residual acylglycerol under optimum conditions: enzyme concentration of 500 U g-1 oil, reaction temperature of 45 ºC and water/oil mass rate of 2:1 (m/m) after 24 h reaction.Três lipases microbianas nativas (Aspergillus niger, Rhizopus javanicus e Penicillium solitum) foram utilizadas na hidrólise do óleo de salmão (teor de AGPI n-3 de 30,1%) com o objetivo de concentrar o conteúdo de ácidos graxos poliinsaturados n-3 (AGPI n-3) nos acilgliceróis residuais. A metodologia de planejamento experimental e análise de superfície de resposta foi usada para se chegar às condições otimizadas de cada reação enzimática, utilizando as seguintes variáveis; temperatura (X1), quantidade de lipase (X2) e taxa de água/óleo (X3). Com base nos resultados do planejamento, a lipase de Aspergillus niger foi a mais eficiente na concentração dos AGPI n-3, sendo que as condições ótimas de reação foram: concentração de enzima de 500 U g-1 óleo, temperatura 45 ºC e taxa de água/óleo de 2:1 m/m após 24 h de reação. O grau de hidrólise (60%) conduziu a um aumento do conteúdo de ácido docosahexaenóico (DHA) de 14,4% para 34,0% (enriquecimento de 2,4 vezes) nos acilgliceróis residuais após a hidrólise do óleo de salmão.117124Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq