A Self-Sensing and Self-Actuating Active Rotor With an Algorithmic Direct Search Controller

Jiménez, Samuel; Keogh, Patrick

doi:10.1109/tmech.2017.2668762

Cited by 3 publications

(2 citation statements)

References 21 publications

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“…Baghli et al [9] developed a wireless instantaneous torque meter using MEMS accelerometers and the experimental study verifies the accuracy of this wireless torque meter. Jiménez et al [10,11] obtained the rotor orbit and rotating speed information using internal MEMS accelerometers and then an active control strategy leads to intelligent rotors with time-varying characteristics. Elnady et al [12,13] installed a MEMS accelerometer on a shaft for investigating the critical speeds of rotating machines.…”

Section: Introductionmentioning

confidence: 99%

Orthogonal On-Rotor Sensing Vibrations for Condition Monitoring of Rotating Machines

Xu¹,

Tang²,

Feng³

et al. 2021

JDMD

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Thanks to the fast development of Micro-Electro-Mechanical Systems (MEMS) technologies, MEMS accelerometers show great potentialities for machine condition monitoring. To overcome the problems of a poor signal to noise ratio, complicated modulation, and high costs of vibration measurement and computation using conventional Integrated Electronics Piezo-Electric (IEPE) accelerometers, a triaxial MEMS accelerometer based On-Rotor Sensing (ORS) technology was developed in this study. With wireless data transmission capability, the ORS unit can be mounted on a rotating rotor to obtain both rotational and transverse dynamics of the rotor with a high signal to noise ratio. The orthogonal outputs lead to a construction method of analytic signals in the time domain, which is versatile in fault detection and diagnosis of rotating machines. Two case studies based on an induction motor were carried out, which demonstrated that incipient bearing defect and half broken rotor bar can be effectively diagnosed by the proposed measurement and analysis methods. Comparatively, vibration signals from transitional on-casing accelerometers are less capable of detecting such faults. This demonstrates the superiority of the ORS vibrations in fault detection of rotating machines.

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Section: Introductionmentioning

confidence: 99%

Orthogonal On-Rotor Sensing Vibrations for Condition Monitoring of Rotating Machines

Xu¹,

Tang²,

Feng³

et al. 2021

JDMD

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show abstract

“…The sensing and control of rotor vibration using rotormounted actuators and sensors can extend functionality and peformance in smart machine systems (Jiminez and Keogh, 2017;Jimenez et al, 2016;Lees and Friswell, 2016;Zhou and Shi, 2001). For flexible rotors, the application of piezoceramic laminates can provide vibration control capabilities without adding significantly to the mass or complexity of the structure.…”

Section: Introductionmentioning

confidence: 99%

Piezo-based flexural vibration suppression for an annular rotor via rotating-frame H2 control optimization

Brand

Cole

2021

Journal of Intelligent Material Systems and Structures

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Elastic vibration can arise in annular and thin-walled rotor structures, impacting on operating performance and the risk of failure. Feedback control to reduce flexural vibration can be realized using lightweight actuators and sensors embedded in the rotor structure. To design optimal controllers, rotating-frame models of both the structural dynamics and sources of excitation are required. This paper describes a solution to this problem for the case of an annular rotor equipped with piezo patch actuators and sensors. To account for space-fixed external excitation sources, a forcing function is considered involving specified spatial and frequency domain distributions. A model-based [Formula: see text] synthesis is used to compute optimal control solutions. These are tested experimentally on a thin-walled cylindrical steel rotor for cases with narrowband and broadband excitation sources, applied from the fixed frame. The results show that frequency-splitting within the rotating-frame dynamics plays a key role in predicting and controlling resonance. The effectiveness of the optimal control methodology in reducing circumferential vibration of the annular rotor is also confirmed.

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Diagnosis of Motor Bearing Faults Using the Vibration of an On-Rotor Sensing Method

Shi

Wang

et al. 2023

Mechanisms and Machine Science

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A Self-Sensing and Self-Actuating Active Rotor With an Algorithmic Direct Search Controller

Cited by 3 publications

References 21 publications

Orthogonal On-Rotor Sensing Vibrations for Condition Monitoring of Rotating Machines

Orthogonal On-Rotor Sensing Vibrations for Condition Monitoring of Rotating Machines

Piezo-based flexural vibration suppression for an annular rotor via rotating-frame H2 control optimization

Diagnosis of Motor Bearing Faults Using the Vibration of an On-Rotor Sensing Method

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