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The concept of networked decoupling control system (NDCS for short) is proposed and its fundamental issues are investigated, including its configurations, network-induced delays and data packet dropout. With the introduced concepts of node-device connectivity matrix and network transmission matrix, three typical configurations of NDCSs are also presented and the locations of networks in the system...
The concept of networked feedforward-feedback control system is proposed based on practical industrial process control. Its configurations as well as the development of its uniform model are investigated in detail. Feedforward-feedback control system, wherein the control loops are closed via real-time networks, is called networked feedforward-feedback control system(NFCS for short). Three different...
The concept of networked override control system (NOCS for short) is proposed and its configurations are investigated in detail. Override control system, wherein the control loops are closed via real time networks, is called networked override control system. Based on the proposed node-device connectivity matrix and network transmission matrix, three typical configurations of NOCSs are explicitly...
Communication efficiency is lowered and real-time performance is not good enough in discrete control based on traditional WorldFIP field intelligent nodes in case that the scale of control in field is large. A soft PLC system based on WorldFIP fieldbus was designed and implemented. Link Activity Scheduler (LAS) was integrated into the system and field intelligent I/O modules acted as networked basic...
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