Dynamic Coding-Based Control Scheme Under Lossy Digital Network: An Optimized Time-Varying Packet Length Approach

• Published in: IEEE transactions on cybernetics Vol. 54; no. 5; pp. 1 - 11
• Main Authors: Li, Jiarui, Niu, Yugang, Ho, Daniel W. C.
• Format: Journal Article
• Language: English
• Published: United States IEEE 01.05.2024; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Coding; Control systems design; Decoding; Dynamic encoding–decoding scheme (EDS); Encoding; exponentially ultimately bounded (EUB); Feedback control; Length measurement; lossy digital network; Packet loss; Propagation losses; Protocols; Quantization (signal); quantized-based control; Reluctance machinery; State feedback; Upper bounds
• ISSN: 2168-2267; 2168-2275; 2168-2275
• DOI: 10.1109/TCYB.2022.3232529

This work proposes a design scheme of the desired controller under the lossy digital network by introducing a dynamic coding and packet-length optimization strategy. First, the weighted try once-discard (WTOD) protocol is introduced to schedule the transmission of sensor nodes. The state-dependent dynamic quantizer and the encoding function with time-varying coding length are designed to improve coding accuracy significantly. Then, a feasible state-feedback controller is designed to attain that the controlled system subject to possible packet dropout is exponentially ultimately bounded in the mean-square sense. Moreover, it is shown that the coding error directly affects the convergent upper bound, which is further minimized by optimizing the coding lengths. Finally, the simulation results are provided via the double-sided linear switched reluctance machine systems.