Journal
IEEE ACCESS
Volume 7, Issue -, Pages 49726-49737Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/ACCESS.2019.2911120
Keywords
5G; control over wireless; networked control systems; URLLC; tactile Internet; wireless factory automation
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Funding
- German Research Foundation [Deutsche Forschungsgemeinschaft (DFG)] as part of the German's Excellence Strategy through Cluster of Excellence Centre for Tactile Internet With Human-in-the-Loop (CeTI) of Technische Universitat Dresden [390696704, EXC 2050/1]
- Federal Ministry of Education and Research [03ZZ0528E]
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Control over wireless channels promises to be a great enabler for an interconnected world. Historically, the control engineering and wireless communications domains were seen as separate, but with upcoming 5G networks, joint design of wireless control systems promises large gains in both the domains for a wide range of applications. By means of a typical industrial use case of the automated guided vehicles (AGVs), we present a methodology to analyze the latency requirements along with the wireless links from a controller to a plant (downlink) and from a plant to its controller (uplink). From the perspective of a Wireless Communications Engineer, we present a framework to analyze the basic properties of the resulting control cycle in order to derive feasible latency values that differ from the commonly found values in the communications literature. Also, we highlight an approach to derive the proportional-derivative (PD) controller parameters that yield the best control performance according to the integral of absolute error (IAE) criterion. At last, we present the idea of a cross-domain manager (CDM) that is able to translate (in real-time) the current network performance metrics to optimal controller gains.
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