Isidro Calvo

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Although distributed real-time (RT) systems are intrinsically complex to develop and maintain, the use of certain object-oriented (OO) technologies such as CORBA and CORBA-RT facilitates those tasks. This is the main reason why these technologies are becoming increasingly popular. Moreover, CORBA is complemented with additional services that solve specific(More)
FTT-CORBA is a middleware architecture aimed at synchronizing the task activations of a distributed system according to a plan that may be changed in run-time. In this architecture tasks are wrapped as CORBA methods that are activated by a central node, the Orchestrator. FTT-CORBA allows loading and managing distributed applications in run-time by means of(More)
Today’s Substation Automation Systems (SAS) are formed by diverse microprocessor-based devices that carry out several operations such as metering, monitoring, protection and actuation. Standards, such as IEC61850, aim at providing abstract component-based solutions that improve scalability and ease the replacement of the devices. This paper discusses the(More)
This paper describes the different communication patterns followed in industrial communications and maps them into DDS (Data Distribution Service) which is a recent middleware specification. This specification follows the publisher/subscriber paradigm and it is characterized by providing an API that allows tuning the QoS (Quality of Service) of the(More)
The adoption of new technologies and automation standards, such as OPC-UA and IEC61499, is essential in order to satisfy the flexibility and reconfiguration needs required at the Factories of the Future. Currently, the Cyber-Physical Production Systems (CPPS) are at the core of the new control and automation distributed systems. However, it is necessary to(More)
Today's distributed real-time systems require flexibility to adapt to evolving functional and non-functional requirements in run-time. The authors have presented in previous works a middleware architecture based on the Flexible Time-Triggered (FTT) paradigm that allows creating flexible real-time distributed applications over CORBA. This paper focuses on(More)
Cyber-Physical Systems (CPSs) are at the core of the future industrial control systems. Most industrial CPSs are usually implemented over expensive and domain-specific hardware platforms, such as industrial embedded control systems, mainly for safety and security reasons. In less-critical applications the use of open, low-cost hardware platforms that(More)
Modern distributed real-time systems (DRTS) are typically formed by several heterogeneous networked devices. Sometimes these devices must adapt to dynamic environments in which devices may join or leave the network and must respond in run-time to changing requirements ensuring certain levels of QoS. These characteristics yield to systems that are(More)
− The paper deals with the use of object oriented technologies in the modeling of industrial plants that have to be remotely monitored and/or controlled. The main goal is to propose a design methodology for obtaining the model of the so-called Virtual Plant, that a remote and certified user will use to access the real plant for performing command actions(More)