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For part I see ibid., p.Z002490-Z002495. Using a communication network, such as an IP network, in the control loop is increasingly becoming the norm. This process of network-based control (NBC) has a potentially profound impact in areas such as: teleoperation, healthcare, military applications, and manufacturing. However, limitations arise as the communication network introduces delay that often degrades or destabilizes the control system. Four methods have been introduced in Part I of these two companion papers that alleviate the IP network delays to provide stable real-time control. Part II of these papers defines a performance measure for a case study on a DC motor with a networked proportional-integral (PI) speed controller with various network delays and noise levels. Simulation results show that NBC combined with these techniques can successfully maintain system stability. This allows for control of real-time applications.
Date of Conference: 6-10 Nov. 2005