Fault-tolerant method of redundant sensor measurement system

A sensor and measurement equation technology, applied in the field of sensor measurement, can solve problems such as failure to diagnose real-time faults, system loss, and large human subjective factors, so as to avoid subjectivity and untimelyness, ensure measurement accuracy, and improve reliability. sexual effect

Inactive Publication Date: 2017-06-09
JIANGSU UNIV OF SCI & TECH +1
View PDF3 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are the following three problems in the detection and isolation techniques of these three types of fault sensors: (1) The first and third methods all need to set a threshold value, and the value of the threshold value is an empirical value, which leads to artificial subjective The factor is relatively large; (2) The initial error of the sensor in the second method has a great influence on its performance; (3) These three methods all need an observation period, when the sensor output in this period is not normal , it can be judged that the sensor is faulty, and the existence of this observation period makes it impossible to perform fault diagnosis in real time
[0003] However, none of the above three sensor fault detection and isolation methods can make the redu

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Fault-tolerant method of redundant sensor measurement system
  • Fault-tolerant method of redundant sensor measurement system
  • Fault-tolerant method of redundant sensor measurement system

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0039] The main purpose of the present invention is to improve the reliability of the redundant sensor measurement system. The present invention proposes a fault tolerance method for redundant sensors. The method uses drift state estimation and state feedback technology to compensate for fault drift in real time. The drift fault sensor is no longer isolated but compensated in real time, thereby maintaining the redundancy of the system. It is very suitable for measurement systems with high reliability requirements.

[0040] like figure 1 As shown, it is a fault-tolerant method for a redundant sensor measurement system proposed by the present invention, and the specific steps are as follows:

[0041] Step 1. Determine the measurement equation of the redundant sensor measurement system according to the sensor arrangement in the redundant sensor measurement system:

[0042] m=Hω+ε (1)

[0043] where m is the measurement vector, H is the n×3-dimensional sensor measurement matrix...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The present invention provides a fault-tolerant method of a redundant sensor measurement system. The method comprises the steps of obtaining a measurement equation of the redundant sensor measurement system; determining a parity vector and a voting matrix; establishing a state equation and a measurement equation of a fault-tolerant system; obtaining the drift state estimated values of the sensors of the redundant sensor measurement system; according to the drift state estimated values, determining the drift factors; carrying out the feedback compensation on the drift state estimated values of the faulted sensors; taking the compensated sensor output as the system output. The fault-tolerant method can compensate the drifts of the faulted sensors real-timely, guarantees the redundancy characteristic of the system, at the same time, can realize the fault-tolerant operation without needing the threshold values and the observation cycles any more, enables the system to operate stably even though all sensors generate the fault drift, and has a better robustness.

Description

technical field [0001] The invention relates to the technical field of sensor measurement, in particular to a fault-tolerant method for a redundant sensor measurement system. Background technique [0002] Fault-tolerant design is an important means to improve the reliability of the sensor measurement system. The most important method is to use the geometric redundancy design, that is, to use the redundant configuration of the sensor to improve the overall reliability of the sensor measurement system. This fault-tolerant design requires the sensor measurement system to have reasonable fault detection and elimination techniques. When there is a sensor fault, the faulty sensor can be detected in time, and its fault can be eliminated from the measurement system where it is located to ensure that the measurement system can work normally. At present, there are three main detection and isolation technologies for fault sensors: the first is a fault detection and isolation method ba...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G01D21/00G01D18/00
CPCG01D21/00G01D18/00
Inventor 戴晓强吴飞章建峰万振刚赵强袁文华
Owner JIANGSU UNIV OF SCI & TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products