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

A technology for network control systems and fault detection, applied in general control systems, control/adjustment systems, test/monitoring control systems, etc., can solve problems such as aggravated network-induced delays, data packet loss, limited network bandwidth waste, etc., to achieve Reduce conservatism, solve fault detection problem, strong robustness effect

Active Publication Date: 2022-02-22
NORTHEASTERN UNIV LIAONING
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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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  • Fault detection method for nonlinear networked control systems based on event-triggered mechanism
  • Fault detection method for nonlinear networked control systems based on event-triggered mechanism
  • Fault detection method for nonlinear networked control systems based on event-triggered mechanism

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Embodiment Construction

[0056] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0057] In this embodiment, the fault detection method of the nonlinear network control system based on the event-triggered mechanism of the present invention is used to detect the fault of the nonlinear network control system.

[0058] Fault detection methods for nonlinear networked control systems based on event-triggered mechanisms, such as figure 1 shown, including the following steps:

[0059] Step 1: For a nonlinear networked control system with process faults, sensor faults and output disturbances, the Takagi-Sugeno (T-S) fuzzy model method is used for modeling and analysis, and the T-S fuzzy model of the nonlinear networked control system is established;

[0060] ...

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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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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L41/0631H04L41/0695H04L41/14G05B23/02
CPCH04L41/0631H04L41/0695H04L41/145G05B23/0254
Inventor 王迎春郑龙飞杨东升庞萌萌谷永强王占山会国涛刘振伟
Owner NORTHEASTERN UNIV LIAONING
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