Experimental Investigations of Noise Control in Planetary Gear Set by Phasing

Gawande, S. H.; Shaikh, S. N.

doi:10.1155/2014/857462

Cited by 13 publications

(5 citation statements)

References 16 publications

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“…Experimental investigation and validation of the benefits of planet phasing were carried out by Gawande and Shaikh. 11 The results show that the dynamic planetary gear response can be minimized using such phasing.…”

Section: Introductionmentioning

confidence: 96%

Simulation study of active vibration control of planetary gear: Theoretical and numerical analysis using pole placement

Olanipekun

Rustighi

Ferguson

2023

Journal of Low Frequency Noise, Vibration and Active Control

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This paper presents analytical and numerical studies on the active assignment of poles to a planetary gear system for vibration control in order to avoid resonance. This involves feeding back the displacement and velocity to add active stiffness and damping, respectively. A rotating frame of reference has been adopted in order to describe the dynamics over a broad range of rotational speed. As an illustration, the closed loop poles were assigned to the translational directions of the sun gear first and thereafter the carrier. This can be achieved by placing the actuators on the outer race of their bearings mounted onto their shafts. The controller was designed such that the closed loop poles can be assigned considering the rotational speed. In this way, it is possible to apply a robust pole-placement that is insensitive to the rotational speed. Numerical examples, where sensors and actuators were collocated, are presented to demonstrate the feasibility of the method when applied to a physical system. The results shows that the active control force and power required for the system, when rotating, can be determined using a rotating frame of reference and transformed for practical implementation. In addition, the same conjugate poles were assigned to the carrier and sun gear and the optimal place to apply control forces was discovered. This depends upon the control power required to shift the poles from one location to another. The results show that more control power will be required to shift the poles of the system when poles were assigned to the sun gear, where higher active bearing stiffness was required. Therefore, the optimal place to assign poles in this case is the carrier due to lower control power required to shift the system poles.

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Section: Introductionmentioning

confidence: 96%

Simulation study of active vibration control of planetary gear: Theoretical and numerical analysis using pole placement

Olanipekun

Rustighi

Ferguson

2023

Journal of Low Frequency Noise, Vibration and Active Control

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show abstract

“…They varied several factors including the contact ratio of tooth profile and approach of finishing the gears, for them to be able to evaluate the measured data. Gawande and Shaikh [16] conducted an experimental investigation of noise reduction in planetary gear set by application of phasing. When results obtained by application of phasing system and without application of phasing system at 1200 rpm are compared, it is revealed that when meshing phase is applied, the level of noise recorded in the planetary gear set was significantly lower than the one in the planetary gear set without a meshing phase.…”

Section: Introductionmentioning

confidence: 99%

Reducing instabilities of mesh stiffness variation in two-stage gear using phasing method

Gawande

Palande

2020

JMST Adv.

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Mesh stiffness variation is a phenomenon that occurs in a mechanical system when there is a change in number of teeth within the system. This phenomenon leads to parametric instabilities and can cause gear systems to experience severe vibration. This paper investigates the effect of mesh stiffness parameters like mesh phasing and contact ratios, in reducing vibrations, when applied to two-stage gear train. Each gear pair is replaced by two gear pairs, each having half the width as that of primary gear pair. The present study has adopted a systematic approach to develop theoretical expressions for evaluation of instability regions that are created by the connections formed between stiffness variations present at the two meshes and four meshes of the primary gear pairs and replaced gear pairs, respectively. The paper has also studied primary instability, secondary instability and combined instability. Required mesh phasing to eliminate instability regions for four gear meshes was found numerically using MATLAB. It is observed that replaced four gear pairs with proper mesh phasing eliminate the instability regions of original two gear pairs of two stage gear train.

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“…Although the nature of parametric vibration is a well-known and investigated phenomenon [24][25][26], this problem is remaining a challenge. Some methods are proposed of gears profile modification [27] and gears phasing [9,28] with taking into account contact friction and transmission errors [29]. Those methods are applicable only at the design stage.…”

Section: Introductionmentioning

confidence: 99%

Dynamical processes in a multi-motor gear drive of heavy slabbing mill

Krot¹

2019

J. vibroeng.

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A real case study is represented of abrupt failures in a new multi-motor gear drive of vertical rolls in the heavy slabbing mill. Modal analysis is conducted, and the lowest torsional vibration modes are verified by the data from an industrial plant. Conditions of parametric resonances due to variable stiffness of teeth are determined within the range of working speed. The branched gear drive is investigated by the non-linear dynamical model with backlashes. It is shown that instantaneous dynamic loads in driveline are strongly dependent on the difference in gap sizes and phase shift between two intermediate gears in the output gear wheel coupling. Deviation in electrical parameters by 0.5 % is considered as the additional cause of not equal load sharing of parallel motors. Results of this research allowed preventing further failures of the gearbox and optimizing slabbing mill control. The proposed approach can be used in other multi-motor machines.

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Experimental Investigations of Noise Control in Planetary Gear Set by Phasing

Cited by 13 publications

References 16 publications

Simulation study of active vibration control of planetary gear: Theoretical and numerical analysis using pole placement

Simulation study of active vibration control of planetary gear: Theoretical and numerical analysis using pole placement

Reducing instabilities of mesh stiffness variation in two-stage gear using phasing method

Dynamical processes in a multi-motor gear drive of heavy slabbing mill

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