Networked Control Systems with Time-Varying Delay - Stability through Input-Output Transformation
نویسندگان
چکیده
Angesichts steigender Komplexität moderner Automatisierungssysteme gewinnen Netzwerkregelungssysteme wegen ihrer Modularität und vereinfachten Diagnose mehr und mehr an Bedeutung. In derartigen Systemen sind Prozess und Regler räumlich getrennt und über ein Kommunikationsnetz verbunden. Die dadurch induzierte Kommunikationstotzeit wirkt potenziell destabilisierend. In diesem Artikel wird eine neuartige Methode zur Stabilisierung in Gegenwart von variabler Totzeit vorgeschlagen, welche auf einer Eingangs-Ausgangs-Transformation basiert. Anstelle der ursprünglichen Ausgänge von Prozess und Regler werden Linearkombinationen aus deren Einund Ausgängen über das Kommunikationsnetz übertragen. Asymptotische Stabilität kann für Netzwerkregelungsysteme bestehend aus nichtlinearen eingangs-ausgangs-passiven Teilsystemen und beliebig große variable Totzeit mit begrenzter Änderungsrate garantiert werden. Die vorgeschlagene Methode zeichnet sich in Vergleich zu bekannten Ansätzen durch eine hervorragende Regelgüte aus. Ihre Validität wird in Simulationen bestätigt.
منابع مشابه
Networked Control Systems with Time-Varying Delay - Stability through Input-Output Transformation (Netzwerkregelungssysteme mit variabler Totzeit - Stabilität durch Eingangs-Ausgangs-Transformation)
With the increasing complexity of modern automation systems, Networked Control Systems (NCS) gain more and more importance due to their modularity and simplified diagnosis. In NCS, plant and controller are spatially separated and the control loop is physically closed through a communication network. Communication time delay in a NCS degrades the performance and may lead to instability. In this ...
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