DTHMM based delay modeling and prediction for networked control systems

作者：Cong, Shuang^*; Ge, Yuan; Chen, Qigong; Jiang, Ming; Shang, Weiwei

来源：Journal of Systems Engineering and Electronics, 2010, 21(6): 1014-1024.

DOI：10.3969/j.issn.1004-4132.2010.06.014

• networked control system
• discrete-time hidden Markov model
• network state
• delay prediction

In the forward channel of a networked control system (NCS), by defining the network states as a hidden Markov chain and quantizing the network-induced delays to a discrete sequence distributing over a finite time interval, the relation between the network states and the network-induced delays is modelled as a discrete-time hidden Markov model (DTHMM). The expectation maximization (EM) algorithm is introduced to derive the maximum-likelihood estimation (MLE) of the parameters of the DTHMM. Based on the derived DTHMM, the Viterbi algorithm is introduced to predict the controller-to-actuator (C-A) delay during the current sampling period. The simulation experiments demonstrate the effectiveness of the modelling and predicting methods proposed.

• 出版日期2010-12
• 单位安徽工程大学; 中国科学技术大学