Instantaneous Rotation Speed Measurement System Based on Variable Reluctance Sensors for Torsional Vibration Monitoring

Addabbo, Tommaso; Marco, Mauro Di; Fort, Ada; Landi, Elia; Mugnaini, Marco; Ferretti, Gianluca

doi:10.1109/tim.2018.2877808

Cited by 26 publications

(10 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As a signal gauged from the gear axle, torsional vibration conveys the operational information of the gearbox as well (Addabbo et al, 2019). Assuming that all the gears of a planetary gear set are isotropic on the circumference, the propagation distance from the meshing locations of each gear pair to the torsional vibration sensor is invariant.…”

Section: Introductionmentioning

confidence: 99%

“…Then the free vibration characteristics of a 2K-H planetary gearbox were investigated. Subsequently, the nonlinear dynamical behavior was studied, and the comparison with a 2D finite element model was carried out to prove the effectiveness of the lumped-parameter model (Ambarisha and Parker, 2007). Li et al (2014) developed a dynamic model for a multistage planetary gear train and analyzed the influences of damping, backlash, and excitation frequency on system dynamic characteristics.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Dynamic modeling and vibration analysis of a cracked 3K-II planetary gear set for fault detection

et al. 2021

View full text Add to dashboard Cite

Abstract. The 3K planetary gear system is a basic planetary transmission structure with many advantages over the 2K-H planetary gear system. However, the vibration characteristics will be more complicated due to the increase of central gears meshing with each planet gear simultaneously. In this paper, a lumped-parameter model for a 3K-II planetary gear set was developed to simulate the dynamic response. The time-varying stiffness of each meshing pair for different gear tooth root crack faults is calculated via the finite element method. By considering the effect of time-varying transmission paths, the transverse synthetic vibrations are obtained. Subsequently, the feasibilities of transverse synthetic vibration signals and output torsional vibration signals as reference for fault diagnosis are analyzed by studying the time-domain and frequency-domain characteristics of these two vibration signals. The results indicate that both the transverse synthetic vibration signals and output torsional vibration signals can be used for fault identification and localization of the 3K-II planetary gear train, and yet they both have their limitations. Some results of this paper are available as references for the fault diagnosis of 3K planetary gear trains.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Dynamic modeling and vibration analysis of a cracked 3K-II planetary gear set for fault detection

et al. 2021

View full text Add to dashboard Cite

show abstract

“…The speed measurement and assessment are vital in different applications with translational motion such as for railway (Fig. 1 a)) and rotating motion for control, maintenance and protection purposes [Addabbo 2019]. Various methods and technologies are currently used for the speed measurements such as optical sensors, capacitive sensors, magnetic reluctance and eddy current saliency based sensors.…”

Section: Introductionmentioning

confidence: 99%

A Novel Eddy Current Speed Sensor With a Ferrite E-Core

2020

View full text Add to dashboard Cite

This letter presents a novel speed sensor based on the motion induced eddy currents in conductive moving parts. The magnetic yoke is Ferrite core with E shape. The excitation coil is wound around the centre leg of the E-core and two antiserially connected pick up coils are located on the side legs. Solid iron and aluminum materials are considered for the moving part in the simulations and measurements. 2D and 3D finite element methods are used for the detailed analysis and the parametric calculations of the sensor. Excellent linearity is shown despite the sensor simple construction. The analysis and measurements are performed at different speeds and excitation frequencies to evaluate the sensor performance. The minimum achieved linearity error is 0.5%.

show abstract

“…HE SPEED sensors are key component of control and monitoring systems in linear and rotating machines [1]- [2]. Optical speed sensors are representatives of wellestablished nonmagnetic technology.…”

Section: Introductionmentioning

confidence: 99%

Rotational Eddy Current Speed Sensor

et al. 2019

View full text Add to dashboard Cite

A novel eddy current speed sensor is develope d to measure rotational speed of conductive o bj e ct s. Th e s e nso r co ns ist s o f o n e e xcitation coil and two pick up coils around rotating cylinder or rod. The sensor does not use magnetic y o ke. Fo r t h e a n aly si s a n d e xperimental verification we used 30 mm diameter non-magnetic aluminum and also magnetic solid iron cylinders. The calculated and me asured speed range is until 1200 rpm. 2D analytical method is developed to calculate sensor performance. 2D finite element i s a l so use d for simulations to compare results with 2D analytical method. 3D finite elemen t a n a lys is i s requ ired t o t a k e i nt o a cco u nt significant 3D effects due to the air coils configuration. The experimental results are presented at different steady s t a te s pe eds. Th e calculations results are compared with measurements to validate theoretical models and sensor performance. The eddy current s pe ed se nsor shows high linearity even at low speeds. For ferromagnetic rods we suggest novel double-layer configura t io n: n on-m ag net ic conductive ring or shell on top of the iron rod minimizes the influence of the permeability changes. The main advantage o f t h e n o vel se nsor is that it has neither mechanical nor electrical contact to the rotating rod.

show abstract

Instantaneous Rotation Speed Measurement System Based on Variable Reluctance Sensors for Torsional Vibration Monitoring

Cited by 26 publications

References 37 publications

Dynamic modeling and vibration analysis of a cracked 3K-II planetary gear set for fault detection

Dynamic modeling and vibration analysis of a cracked 3K-II planetary gear set for fault detection

A Novel Eddy Current Speed Sensor With a Ferrite E-Core

Rotational Eddy Current Speed Sensor

Contact Info

Product

Resources

About