| The Networked Control Systems (NCS) affected by networked-introduced delay, data packet dropout and multiple-transmission are systematically analyzed in this paper.Firstly, the characters of three main types of control network applied in industrial area are discribed. The advantages and disadvantages of each network are analyzed. Then a simulation platform of networked control system based on truetime toolbox is constructed. The effects of the networks are evaluated through a series simulations of DC-servo control system.Secondly, based on discrete model of NCS, The effects of networked-introduced delay are analyzed. The sufficient conditions base on fuzzy linear matrix inequalities(LMI) for stability is proposed under the condition that the delay is bounded. Then conditions of guarenteed cost control is deduced.Finally, based on sampled-data model, The NCS with multiple sensor and multiple actuator is analyzed. With the compensation of data packet dropout by varying sample interval, The sufficient delay-dependent reliable LMI condition for NCS is proposed . |
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