Network control system dynamic switching control method based on average residence time

Abstract

Provided is a network control system dynamic switching control method based on average residence time. The method based on the average residence time is characterized by converting the influence of uncertain and randomly-changing time delay and packet loss on dynamic property of a network control system into a kind of discrete switching event, and establishing a discrete switching control model of the network control system allowing to comprise an unstable subsystem; ensuring that the network-induced time delay is always smaller than one sampling period, and meanwhile, guaranteeing that a new control variable in the current sampling period can be acted on a controlled object by utilizing an improved initiative variable sampling hybrid node driving mechanism; and providing a sufficient condition for solving the existence of a modal dependence switching controller based on a multiple-Lyapunov function method, and providing a design method of the switching controller meeting indefinite subsystem switching sequence allowing the average residence time by adopting an optimal cycle algorithm, and ensuring the stability of the network control system under the condition of limited communication and incomplete information.

Description

technical field [0001] The present invention relates to the field of automatic control, in particular to a network control system dynamic switching control method based on average dwell time, aiming at the network control system after the sampling discretization of the dynamic characteristics caused by the uncertain change of time delay and packet loss after the introduction of the network The stochastic uncertainty that changes with the sampling period, based on the average dwell time method, the switching control model of the network control system that allows unstable subsystems is established, and the discrete network with time delay and packet loss is given by the multi-Lyapunov function method The sufficient conditions for the existence of mode-dependent switching controllers of the control system are given, and a switching control method satisfying the switching order of unrestricted subsystems with allowable average dwell time is given. Background technique [0002] ...

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Problems solved by technology

[0003] However, while the introduction of the network has brought various advantages to the control system, it has also brought new challenging problems to the system and control theory, mainly including: (1) Multiple users share the communication line and the flow rate changes Rules and different network protocols will inevitably lead to network-induced delays of different nature (2) Network congestion, connection interruption and channel interference will inevitably lead to timing disorder and packet loss of network data packets

The introduction of these random and variable factors has greatly increased the complexity of system analysis and design, because: (1) the arrival of data is no longer constant and regular, resulting in the loss of system stability; (2) Loss or error may occur during the transmission process, resulting in the loss of data integrity; (3) The uncertainty of data transmission time and the randomness of packet loss lead to the loss of system determinism

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