Fraunhofer-Institut für Produktionsanlagen und Konstruktionstechnik IPK

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  • Publication
    Data mining and visualization of diagnostic messages for condition monitoring
    ( 2013)
    Uhlmann, Eckart
    ;
    Geisert, Claudio
    ;
    Hohwieler, Eckhard
    ;
    Altmann, Ian
    Complex technical systems consist of a huge amount of electromechanical subsystems and components with more or less interdependencies. During the operational phase these systems are subject to wear and tear and other degradation mechanisms. Therefore condition monitoring is a major challenge for operators of such systems. A well-established practice of implementing condition monitoring is to equip the system, or its functionally relevant components with appropriate sensors and measurement technology. Selection of sensors and diagnostic algorithms requires a deep understanding of physical correlations which is usually a core competence of the system provider. Moreover, subsequent installation of a condition monitoring system using additional sensors in most cases is attended by an interference with the system and may affect its functionality if constructional changes of the system for sensor mounting become necessary. A more simple way to access data for technical diagnosis is the use of an on board diagnosis system that collects the system messages that rise while the system is in operation. To control and monitor functionality and interaction between subsystems, each of them generates internal state variables and communicates a subset of these as system messages via task specific bus systems. Here the challenge is to find a suitable way of analyzing the messages. The present paper discusses how to handle system messages for condition monitoring purposes by using data mining and visualization.
  • Publication
    Improving maintenance services for machine tools by integrating specific software functions
    ( 2013)
    Uhlmann, Eckart
    ;
    Otto, Franz
    ;
    Geisert, Claudio
    Information and communication technology (ICT) reveals high potential to make maintenance, repair, and overhaul (MRO) services more efficient. This paper presents a concept for an ICT system that will support field service technicians as well as administrational staff. The system will provide software functions for service preparation and to guide service technicians through process operations, providing machine documentation, machine and service history, and data from the machine control. A multi-agent based communication concept will enable interaction between administrational staff, service technician, and machine tool by data exchange, generation of situational instructions, and automated documentation of service activities.