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An adaptive tuning algorithm for IEEE 802.15.4-based network control system

A wireless network control system (WNCS) is a control system whose network is closed over a wireless channel. The control performance can be degraded due to the imperfection of the wireless network. This paper studies the co-design of Media Access Control (MAC) layer parameters and sampling period of a model-based network control system (MB-NCS). In particular, a stability condition of MB-NCS in terms of packet loss, packet delay and sampling period is established. An adaptive tuning algorithm is proposed to find the optimum parameter set, which can guarantee the stability of control system and minimize the energy consumption. The results show that the co-design approach outperforms traditional network control system in terms of energy reduction and is robust against time-varying network traffic.