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Robust filter-based fault detection method for positive linear network control system

A network control system and fault detection technology, applied in general control systems, control/regulation systems, adaptive control, etc., can solve problems such as network channel quality and network traffic congestion

Active Publication Date: 2020-01-24
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

This delay may depend on variable network conditions such as network channel quality and network traffic congestion due to the limited bandwidth of the communication network

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  • Robust filter-based fault detection method for positive linear network control system
  • Robust filter-based fault detection method for positive linear network control system
  • Robust filter-based fault detection method for positive linear network control system

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Embodiment Construction

[0049] In order to describe the technical solution disclosed in the present invention in detail, further elaboration will be made below in conjunction with the accompanying drawings and specific implementation methods.

[0050] A fault detection method for a positive linear network control system based on a robust filter, comprising the following steps:

[0051] The first step is to set the discrete model of the positive linear networked control system, and then design the corresponding robust filter;

[0052] In the second step, an augmented system is established by combining the discrete model and the designed filter to generate residuals;

[0053] The third step is to select an appropriate residual evaluation function and threshold, and give a fault detection scheme;

[0054] The fourth step is to use the upper and lower bound information of uncertain parameters to derive the augmented system as a positive system, which is stable and satisfies l 1 / l - Sufficient conditi...

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Abstract

The invention discloses a robust filter-based fault detection method for a positive linear network control system. The method comprises the following steps of: establishing a discrete model of the positive linear network control system according to the current situation of the network control system with time delay and uncertainty, and designing a corresponding robust filter; establishing an augmented system according to the discrete model and the filter so as to generate a residual error; scaling upper and lower bounds of uncertain parameters to derive the augmented system as a positive system, wherein the augmented system is stable and meets the sufficient condition of 1 / l (robustness / fault sensitivity) performance; and solving filter parameters by an iterative algorithm and combining an optimization target, namely realizing fault detection of the positive linear network control system while considering the robustness and the fault sensitivity. By the iterative algorithm, the application range is greatly widened, the fault detection efficiency is improved, and the method can be applied to various sensor-based / sensorless fault systems with uncertain parameters.

Description

technical field [0001] The invention relates to the field of system control, in particular to a fault detection method of a positive linear network control system based on a robust filter. Background technique [0002] A network control system (NCS) refers to the connection between the controlled object and the controller through a network. Its characteristic is that information such as system input and output is exchanged between system components (sensors, controllers, and actuators) through the network. NCS is playing an increasingly important role in social infrastructure, such as smart homes, smart grids, and modern public transportation systems. In the past decade, researchers of systems and control have developed mechanism systems science and control engineering methods, such as frequency domain method, time domain method, state space method, robust control method, stochastic control method, etc., and computer science and Network researchers have achieved remarkable ...

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Application Information

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IPC IPC(8): G05B13/04
CPCG05B13/042
Inventor 沈俊蒋靖雯
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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