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Packet buffering, dead time identification, and state prediction for control quality improvement in a networked control system

  • Andrzej TutajEmail author
  • Wojciech Grega
Conference paper
Part of the Advances in Intelligent Systems and Computing book series (AISC, volume 577)

Abstract

Time-varying communication delays, data packet dropping, and other network-induced phenomena are inherent in networked control systems. Their presence can deteriorate noticeably control quality and narrow stability margins forcing designers to adopt conservative controller tuning. Control quality drop can be to some extent remedied by employment of network packet buffering or queuing, finite horizon state estimation, and continual time delay identification methods applied to networked control loops. The paper presents a modular structure for a networked control system where the named techniques are deployed in a network node located on the actuator site. A case study for a DC motor servomechanism and a periodic trajectory tracking problem is given. Simulation results are provided.

Keywords

networked control systems distributed control systems network induced time-varying communication delay packet dropout packet buffering packet queueing state prediction state reconstruction state estimation Luenberger state observer least mean squares method delay time identification linear-quadratic controller DC motor servomechanism tracking control servo control 

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Copyright information

© Springer International Publishing AG 2017

Authors and Affiliations

  1. 1.Faculty of Electrical Engineering, Automatics, Computer Science and Biomedical Engineering Department of Automatics and Biomedical EngineeringAGH University of Science and TechnologyKrakowPoland

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