Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Systems of Linear Equations in Two Variables

Systems of Linear Equations in Two Variables

Solving a system of linear equations is a fundamental concept in algebra. A system of equations consists of two or more linear equations involving the same set of variables. One of the most efficient algebraic methods for solving such systems is the substitution method. This technique involves expressing one variable in terms of the other from one equation and substituting it into the second equation. This method is particularly useful when one of the equations is easily rearranged.Consider the...

Fault Types

Fault Types

When analyzing a single line-to-ground fault from phase A to ground at a three-phase bus, it is important to consider the fault impedance. This impedance is zero for a bolted fault, equal to the arc impedance for an arcing fault, and represents the total fault impedance for a transmission-line insulator flashover. To derive sequence and phase currents, fault conditions are translated from the phase domain to the sequence domain.
For line-to-line faults occurring between phases B and C, the...

Feedback Inhibition

Feedback Inhibition

Biochemical reactions are occurring constantly in cells, converting starting substances to different products, usually with the help of enzymes that speed the reactions. Without enzymes, it would take far too long for most reactions to occur to be useful to the cell!

Feedback Loops

Feedback Loops

In most cases, excessive hormone production is prevented by negative feedback—a loop that starts with a stimulus inducing the release of a particular substance, like a hormone, to maintain a certain level before triggering a signal that results in a decrease in further release of the hormone.

Effects of feedback

Effects of feedback

Feedback in control systems plays a critical role in shaping various operational parameters, extending beyond simple error reduction to influence stability, bandwidth, gain, impedance, and sensitivity. Understanding these effects requires examining a basic feedback system characterized by defined input, output, error, and feedback signals.
Feedback significantly modifies the gain of a control system. The gain of a system without feedback is altered by a factor of one plus GH, where G represents...

Collar Bearings

Collar Bearings

Collar bearings are essential in various machines designed to support axial loads on rotating shafts. Depending on the specific application and requirements, they can be found with single or multiple collars.

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

Structure aware graph community cluster pruning for efficient neural network compression in Parkinson's disease diagnosis.

Scientific reports·2026

Same author

A distribution-level statistical framework for reliable pipeline leak detection using multi-domain signal analysis.

Scientific reports·2026

Same author

Attention mechanism-based CNN-LSTM hybrid deep learning model for industrial pipeline leak detection.

Scientific reports·2026

Same author

A multistage transfer learning framework for intelligent fault diagnosis of rotating machinery under variable operating conditions.

Scientific reports·2026

Same author

Physics guided fused image learning with enhanced squeeze excitation for failure analysis of multistage centrifugal pumps.

Scientific reports·2026

Same author

Gaussian process regression with physics-guided pseudo-sample augmentation for wear prediction under sparse measurements in milling.

Scientific reports·2026

Search research articles

Related Experiment Video

Updated: Feb 1, 2026

Three-Dimensional Imaging of Tumor-Bearing Tissue Using the Iterative Bleaching Extends Multiplexity Approach

Three-Dimensional Imaging of Tumor-Bearing Tissue Using the Iterative Bleaching Extends Multiplexity Approach

Published on: April 25, 2025

Bearing Fault Diagnosis Using an Extended Variable Structure Feedback Linearization Observer.

Farzin Piltan¹, Jong-Myon Kim²

¹Department of Electrical, Electronics and Computer Engineering, University of Ulsan, Ulsan 680⁻749, Korea. piltan_f@iranssp.org.

Sensors (Basel, Switzerland)

|December 15, 2018

Summary

A new variable structure feedback linearization observer (FLO) enhances bearing fault detection and diagnosis (FDD). This robust method improves fault estimation, ensuring safer rotating machinery operations.

Keywords:

bearing fault detection feedback linearization observer model-reference fault diagnosis proportional integral observer variable structure observer

More Related Videos

The Role of Fabric in Frictional Properties of Phyllosilicate-Rich Tectonic Faults

The Role of Fabric in Frictional Properties of Phyllosilicate-Rich Tectonic Faults

Published on: November 6, 2021

Control of Eating Behavior Using a Novel Feedback System

Control of Eating Behavior Using a Novel Feedback System

Published on: May 8, 2018

Related Experiment Videos

Last Updated: Feb 1, 2026

Three-Dimensional Imaging of Tumor-Bearing Tissue Using the Iterative Bleaching Extends Multiplexity Approach

Three-Dimensional Imaging of Tumor-Bearing Tissue Using the Iterative Bleaching Extends Multiplexity Approach

Published on: April 25, 2025

The Role of Fabric in Frictional Properties of Phyllosilicate-Rich Tectonic Faults

The Role of Fabric in Frictional Properties of Phyllosilicate-Rich Tectonic Faults

Published on: November 6, 2021

Control of Eating Behavior Using a Novel Feedback System

Control of Eating Behavior Using a Novel Feedback System

Published on: May 8, 2018

Area of Science:

Mechanical Engineering
Control Systems Engineering

Background:

Rolling element bearings are critical components in rotating machinery.
Effective bearing fault detection and diagnosis (FDD) is essential for operational safety and health.

Purpose of the Study:

To propose an enhanced observer-based FDD method using a variable structure feedback linearization observer (FLO).
To improve the robustness and reduce uncertainties in traditional feedback linearization observers for bearing fault diagnosis.

Main Methods:

Development of a variable structure feedback linearization observer (FLO).
Implementation of the FLO for fault estimation in rolling element bearings.
Validation using the Case Western University vibration dataset for outer, inner, and ball faults.

Main Results:

The proposed FLO demonstrated improved robustness in fault estimation compared to traditional methods.
The FLO outperformed the variable structure observer (VSO) by 5.5%, traditional feedback linearization observer (TFLO) by 8.5%, and proportional-integral observer (PIO) by 18.5% on average.
Successful identification of outer, inner, and ball bearing faults was achieved.

Conclusions:

The variable structure FLO is an effective and robust method for bearing fault detection and diagnosis.
This advanced observer technique enhances the reliability of rotating machinery monitoring systems.