Paulo E. Miyagi

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Faults occurrence is inevitable in real world and a practical alternative approach is the reduction of fault consequences. Despite of this, the majority of buildings control systems do not have such mechanisms. Thus, this work proposes a procedure for the modeling of control systems for intelligent buildings which considers their functional specifications(More)
EMILIA VILLANI, JEAN CLAUDE PASCAL*, PAULO EIGI MIYAGI, ROBERT VALETTE* Instituto Tecnológico de Aeronáutica – Mechanics Department 112 São José dos Campos – SP, Brazil, e-mail: Escola Politecnica da Universidade de São Paulo Av. Prof. Mello Moraes, 2231 São Paulo, Brasil, e-mail: *Laboratoire d’Analyse et d’Architecture des(More)
Programmable logic controller is still the main device used for control of productive systems, which can be approached as discrete event dynamic systems. For programming these controllers, five languages were standardized by IEC 61131, and the LD (ladder diagram) language is distinguished among the others, i.e., it has been widely applied in productive(More)
The Flexible Manufacturing Systems (FMS) belong to class of productive systems in which the main characteristic is the simultaneous execution of several processes and sharing a finite set of resource. The process is defined as being a sequence of steps or activities. These activities are established a priori as being activities of transformation and/or(More)
Safety Instrumented Systems (SIS) are designed to prevent and / or mitigate accidents, avoiding undesirable high potential risk scenarios, assuring protection of people’s health, protecting the environment and saving costs of industrial equipment. Standards such as ANSI/ISA S.84.01; IEC 61508, IEC 61511, among others, guide different activities related to(More)
Recent studies show the designs of automated systems are becoming increasingly complex to meet the global competitive market. Additionally, organizations have focused on policies to achieve people’s safety and health, environmental management system, and controlling of risks, based on standards. In this context, any industrial system in the event of a fault(More)
On-line fault diagnostic system for proton exchange membrane fuel cells Luis Alberto M. Riascos a,∗, Marcelo G. Simoes b, Paulo E. Miyagi c a Federal University of ABC, r. Santa Adelia 166, CEP 09210-170, Santo Andre, Sao Paulo, Brazil b Colorado School of Mines, 1500 Illinois St, 80401 Golden, CO, USA c Escola Politecnica, University of Sao Paulo, Av.(More)
PFS-R – Production Flow Schema with Resources – is a novel graphical representation for complex resource sharing discrete production systems proposed in this paper. The PFS-R is an augmented version of the PFS (Production Flow Schema, previously proposed by the authors) which includes correspondences of system resources at each production step. The PFS-R is(More)
This paper introduces a methodology for modeling and analyzing fault-tolerant manufacturing systems that not only optimizes normal productive processes, but also performs detection and treatment of faults. This approach is based on the hierarchical and modular integration of Petri Nets. The modularity provides the integration of three types of processes:(More)