Detection and monitoring of coupling misalignment in rotors using torque measurements

Reddy, M. Chandra Sekhar; Sekhar, A. S.

doi:10.1016/j.measurement.2014.10.031

Cited by 56 publications

(9 citation statements)

References 17 publications

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“…Chacon et al [60] conducted an experimental investigation using Acoustic Emission (AE) technique, to detect shaft angular misalignment. Reddy and Sekhar [61] presented an alternative method to detect misalignment using torque measurement and observed that angular misalignment torque signature and parallel misalignment torque signatures are having different spectral characteristics. Another misalignment detection tool was introduced by Fatima et al [62,63], by measuring the rate of temperature rise of shaft coupling through thermal imaging.…”

Section: Diagnostic Analysis and Experimental Investigationmentioning

confidence: 99%

Vibration characteristics of a rotor-bearing system caused due to coupling misalignment – a review

Kumar¹,

Sathujoda²,

Ranjan³

2021

Vib. proced.

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In this paper, the authors presented various insights into theoretical and experimental analysis carried out in past, to understand the vibration characteristics of a misaligned rotor-bearing system. The literature presented by various researchers was reviewed methodically. Firstly, the literature review based on theoretical vibration analysis of misaligned rotor system with emphasis on finite element method has been presented. Secondly, various vibration-based analysis methods and the description of experimental measurement techniques have been discussed in detail. Apart from the above, distinct tools used for the detection of fault analysis of the rotor system is also reviewed systematically, which may be useful for preventive maintenance of the rotating machinery used in several industries.

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Section: Diagnostic Analysis and Experimental Investigationmentioning

confidence: 99%

Vibration characteristics of a rotor-bearing system caused due to coupling misalignment – a review

Kumar¹,

Sathujoda²,

Ranjan³

2021

Vib. proced.

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“…Reddy and Sekhar [25] developed a method using strain sensors for the detection of shaft misalignment at low speed. Wang et al [26] used the torque signal for the detection of coupling misalignment in the rotor. Wang and Jiang [27] used laser measurements to detect misalignment.…”

Section: Related Workmentioning

confidence: 99%

Faults Detection and Classification under Variable Condition Using Intrinsic Time - Scale Decomposition and Neural Network

Leddine¹,

Chamceddine²,

Zenasni³

2021

JESA

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Misalignment and unbalance are a common fault occurring in the rotor system. A new approach for detecting misalignment and unbalance problems combining the intrinsic time - scale decomposition (ITD), the root mean square (RMS) and perceptron multilayer network (MLP) is proposed in this paper. Vibration signals of normal condition, misalignment horizontal, misalignment vertical and unbalance with different level are collected under different speed. ITD, nonlinear analysis of signals, was applied to decompose the vibration signals into 8 proper rotation components. The RMS values of 8 components are calculated and using as features vector. Last, the perceptron multilayer network was used for fault identification and classification. The proposed approach accurately classified and detection of unbalance and misalignment; the average accuracy achieved is 97.99%.

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“…Furthermore, especially for the vertical reducer detector with a torque sensor in the measuring chain, the additional sensors mounted on the mechanism can cause a series of problems such as signals acquired to vary according to the positioning of sensors [28,29], onefold information acquisition [30], and additional cost. Some scholars and experts have made some progress on the research of detection and monitoring of coupling misalignment based on torque signal [31]. However, their work only shows the possibilities of torque measurements as a valuable technique for detecting misalignment, and more theoretical studies are needed to show the relationship between the coupling misalignment and the ripple of torque.…”

Section: Introductionmentioning

confidence: 99%

Diagnosis of the Misaligned Faults of the Vertical Test Instrument of High‐Precision Industrial Robot Reducer

Zhang

2021

Shock and Vibration

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High-precision reducer is the core component of industrial robots. In order to achieve the comprehensive performance testing of precision reducers, an instrument with a vertical layout and a cylindrical structure is designed. As a rotating machine, the inevitable coupling misalignment of the instrument can lead to vibration faults which lead to errors in the test. So it is pretty necessary to diagnose and monitor the coupling misalignment while the instrument is working. The causes of the coupling misaligned fault of the instrument and the relationship between the misalignment fault and torque ripple are analyzed in this paper. A method of using the torque transducer in the measurement chain of the instrument to diagnose the coupling misalignment is proposed in this paper. Many experiments have been done to test the capability of detecting the coupling misalignment using this method. Experimental results show that the amplitude of torque ripple of the shaft is linearly related to the coupling misalignment and is quadratically related to the rotation speed of the shaft when the misalignment exists in the shaft. The combination of components at the rotation frequency (fr) and the additional components can be used to diagnose faults due to coupling misalignment.

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Detection and monitoring of coupling misalignment in rotors using torque measurements

Cited by 56 publications

References 17 publications

Vibration characteristics of a rotor-bearing system caused due to coupling misalignment – a review

Vibration characteristics of a rotor-bearing system caused due to coupling misalignment – a review

Faults Detection and Classification under Variable Condition Using Intrinsic Time - Scale Decomposition and Neural Network

Diagnosis of the Misaligned Faults of the Vertical Test Instrument of High‐Precision Industrial Robot Reducer

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