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Fault isolation filter for networked control system with event-triggered sampling scheme.

Shanbin Li¹, Dominique Sauter, Bugong Xu

¹College of Automation Science and Engineering, South China University of Technology, Guangzhou 510641, China. shanbin.li@gmail.com

Sensors (Basel, Switzerland)

|February 21, 2012

Summary

This study introduces a send-on-delta scheme for efficient sensor data transmission in networked control systems. The method improves resource use by transmitting data only when significant changes occur, enhancing fault detection.

Keywords:

event-triggered sampling fault isolation filter networked control system send-on-delta

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Area of Science:

Control Systems Engineering
Signal Processing
Fault Detection and Diagnosis

Background:

Networked control systems (NCS) face challenges in resource utilization due to continuous data transmission.
Event-triggered sampling strategies offer a way to reduce data transmission in NCS.
Accurate fault detection and isolation are critical for the reliable operation of NCS.

Purpose of the Study:

To develop an efficient fault isolation filter for discrete-time NCS with multiple faults.
To improve resource utilization in NCS using a send-on-delta scheme.
To maintain graceful fault estimation performance while reducing data transmission.

Main Methods:

Implementation of a send-on-delta scheme for event-triggered sensor data transmission.
Development of a modified fault isolation filter based on a Kalman filter.
Application to discrete-time networked control systems with multiple faults.

Main Results:

The proposed method significantly improves resource utilization by reducing data transmission.
The fault isolation filter effectively handles multiple faults in the system.
Graceful degradation of fault estimation performance is observed, balancing efficiency and accuracy.

Conclusions:

The send-on-delta scheme combined with the modified Kalman filter provides an efficient solution for fault isolation in NCS.
The approach offers a practical method for enhancing NCS reliability and resource management.
The illustrative example confirms the effectiveness and efficiency of the proposed fault isolation strategy.