A hybrid model of networked control systems implemented on WirelessHART networks under source routing configuration

Maass, Alejandro I.; Nešić, Dragan; Dower, Peter M.

doi:10.1109/aucc.2016.7868003

Cited by 6 publications

(10 citation statements)

References 15 publications

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“…That is, each frequency channel is subdivided into timeslots in which an assigned field device is allowed to transmit. WH networks also support multiple access timeslots, however, in this work we restrict our attention to TDMA communications as in [16].…”

Section: A Communication Featuresmentioning

confidence: 99%

“…2. For simplicity, and similar to [16], the following additional assumption is adopted. and assume that ε > 0.…”

Section: B Tdma Superframe Structurementioning

confidence: 99%

“…In our preliminary work [16], we obtained a first hybrid model for WH-NCSs. However, the buffer states of field devices were not included in the model; a restriction that permits only one transmission per timeslot per frequency was omitted; and scheduling of field devices along the network radio frequencies was another missing feature.…”

mentioning

confidence: 99%

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Emulation-based stabilisation of networked control systems over WirelessHART

Maass

Nešić

Dower

et al. 2017

2017 IEEE 56th Annual Conference on Decision and Control (CDC)

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Abstract-We study the emulation-based stabilisation of nonlinear networked control systems (NCSs) implemented over WirelessHART (WH). WH is a communication protocol widely used in process instrumentation. It is characterised by its multi-hop structure, slotted communication cycles, and simultaneous transmission over different frequencies. To capture most functionalities of WH, faithful models are needed. We propose a hybrid control-oriented model of WH-NCSs that includes the key features of the network. We then follow an emulation approach to stabilise the NCS. We show that, under reasonable assumptions on the scheduling protocol, stability is preserved when the controller is implemented over the network with sufficiently frequent data transmission. We then explain how to schedule transmissions over the hops to satisfy those assumptions.

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Section: A Communication Featuresmentioning

confidence: 99%

“…2. For simplicity, and similar to [16], the following additional assumption is adopted. and assume that ε > 0.…”

Section: B Tdma Superframe Structurementioning

confidence: 99%

See 1 more Smart Citation

Emulation-based stabilisation of networked control systems over WirelessHART

Maass

Nešić

Dower

et al. 2017

2017 IEEE 56th Annual Conference on Decision and Control (CDC)

Self Cite

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“…This is ensured, at the beginning of each i-th timeslot on the l-th channel, via the introduction of a synchronising variable delay of duration τ SYNC l,i . For simplicity, and similar to [10], [11], the following additional assumption is adopted.…”

Section: B Tdma Superframe Structurementioning

confidence: 99%

“…linear and discrete-time plant/observer, and equidistant transmissions). To the best of our knowledge, existing results concerning WH include optimal link scheduling [4], [5], controllercommunications co-design [6], [7], modelling and analysis [8], [9], stabilisation [10], [11], and estimation [3].…”

Section: Introductionmentioning

confidence: 99%

Observer design for networked control systems implemented over WirelessHART

Maass

Nešić

Dower

2018

2018 IEEE Conference on Decision and Control (CDC)

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We study the design of state observers for nonlinear networked control systems (NCSs) that are implemented over WirelessHART (WH). WH is a wireless communication protocol for process automation applications. It is characterised by its multi-hop structure, slotted communication cycles, and simultaneous transmission over different frequencies. We present a solution based on the emulation approach. That is, given an observer designed with a specific stability property in the absence of communication constraints, we implement it over a WH network and we provide sufficient conditions on the latter, to preserve the stability property of the observer. In particular, we provide explicit bounds on the maximum allowable transmission interval. We assume that the plant dynamics and measurements are affected by noise and we guarantee an inputto-state stability property for the corresponding estimation error system.

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