Detecção e isolação de falhas utilizando estimação de parâmetrosde modelos contínuos e limites de confiança adaptativos - aplicaçãoa uma Planta Piloto

• Ano de defesa: 1997
• Autor(a) principal: Herlon Ayres Camargo
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Minas Gerais; UFMG
• Palavras-chave em Português: Engenharia Elétrica; Engenharia elétrica
• Link de acesso: http://hdl.handle.net/1843/BUOS-8D8FQG

This work describes the development and implementation of a fault detection and isolation method applied to an interative tank pilot plant. This method is based on recursive parameter estimation of a continuos-time mathematical model. Some problems related to the estimation of continuos-time model parameters were found. The main problem was the difficulty of estimating time derivates of noisy signals,and this was solved with a state variables filter. Specific tunings were made to the parameter estimation algorithm thus improving the fault detection and isolation method. A procedure for fault isolation was developed and yielded promising results. This procedure is able to quantify a fault as weak, median or serious. Different tests were made using the plant for algorithm tuning. Typical results of each fault are presented and discussed.