Fault detection method for nonlinear networked control systems based on event-triggered mechanism

Abstract

The invention provides a fault detection method for a nonlinear network control system based on an event trigger mechanism, and relates to the technical field of network system fault detection. This method first establishes the T-S fuzzy model of the nonlinear network control system, sets the event trigger conditions, establishes the fuzzy fault detection filter model, establishes the fault weighting system, and then establishes the fault detection system model; and according to the fault detection system model, selects the appropriate The residual evaluation function and detection threshold of the nonlinear network control system are used to detect whether the fault occurs in the nonlinear network control system. Finally, according to the sufficient conditions for the stability of the fault detection system and the existence of the fault detection filter, the parameter matrix and event trigger matrix of the fault detection filter are further designed. The non-linear network control system fault detection method based on the event trigger mechanism provided by the present invention greatly improves the robustness to external disturbances and communication delays, and the application of the event trigger mechanism can save limited network resources and computing resources.

Description

technical field [0001] The invention relates to the technical field of network system fault detection, in particular to a fault detection method for a nonlinear network control system based on an event trigger mechanism. Background technique [0002] Due to its low cost of installation and maintenance, high security and reliability, and flexible communication structure, networked control systems have gained widespread attention in complex industrial control systems. In a networked control system, sensors, actuators, and controllers are interconnected through a shared communication network. With the increasing requirements of networked control systems for security, stability, and high performance, the problem of fault detection for networked control systems has become an important research field. [0003] Due to the introduction of the communication network and the characteristics of the network control system itself, it inevitably brings new problems and challenges to the n...

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Problems solved by technology

Therefore, time triggering is easy to cause waste of limited network bandwidth, further aggravating network-induced delay and data packet loss

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