Open AccessSignal difference‐based deadband control for networked control systems with variable sampling intervals
Author(s) -
Liu YingYing,
Che WeiWei,
Chu YunKai
Publication year - 2014
Publication title -
iet control theory and applications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.059
H-Index - 108
eISSN - 1751-8652
pISSN - 1751-8644
DOI - 10.1049/iet-cta.2014.0134
Subject(s) - control theory (sociology) , control system , signal (programming language) , computer science , sampling (signal processing) , control signal , control engineering , sampled data systems , networked control system , variable (mathematics) , control (management) , engineering , mathematics , artificial intelligence , telecommunications , mathematical analysis , electrical engineering , programming language , detector
This study investigates a signal difference‐based deadband control approach as a solution to reduce data transmission in networked control systems (NCSs). A new modelling method for the NCSs with time‐varying delays, time‐varying sampling intervals and signal transmission deadbands is presented. The Lyapunov functional with discontinuity is exploited, which takes full advantages of the NCSs’ characteristic information including the bounds of network delay (BND), the bounds of sampling interval (BSI) and the bounds of transmission deadband (BTD). In addition, it has been shown that Lyapunov functional decreases at the jump instants. Furthermore, the new stability analysis and stabilisation conditions for the NCSs are proposed, which describes the relationship of BND, BSI, BTD and the system stability. Three examples are used to demonstrate the effectiveness of the proposed methods. The simulation results have shown that the proposed approach could guarantee the system asymptotically stable and effectively reduce the data transmission in network channel.