On the effect of multiple parallel nonlinear absorbers in palliation of torsional response of automotive drivetrain

Haris, Ahmed; Motato, Eliot; Mohammadpour, Mahdi; Theodossiades, Stephanos; Rahnejat, Homer; Mahony, M. O’; Vakakis, Alexander F.; Bergman, Lawrence A.; McFarland, D. Michael

doi:10.1016/j.ijnonlinmec.2017.06.008

Cited by 54 publications

(29 citation statements)

References 30 publications

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“…The structure diagram of the laser gyro IMU assembly is shown in Figure 1. Frequency-domain analytical methods focus on the analysis and optimization of the modal and frequency response for the mechatronic systems, which have been widely used in multiple precision manufacturing fields, that is, the dynamic analysis and optimization of the high-performance machine tools [28], the design of the active vibration isolators for the precision instruments [29], and the NVH (noise, vibration, and harshness) analysis of the vehicle [30], among others. In this paper, the vibration frequency response characteristics of the laser gyro IMU are taken as the focus point, and the multi-rigid body dynamic model of IMU for the frequency response analysis is established to clearly describe the multi-DOF coupled vibration behavior in IMU under gyro dither excitation.…”

Section: Structure Components Of Laser Gyro Imumentioning

confidence: 99%

“…Therefore, frequency-domain-analysis based modelling and optimization methods [27] may become the new key techniques for the vibration decoupling and optimization of the laser gyro IMU. Frequency-domain analytical methods focus on the analysis and optimization of the modal and frequency response for the mechatronic systems, which have been widely used in multiple precision manufacturing fields, that is, the dynamic analysis and optimization of the high-performance machine tools [28], the design of the active vibration isolators for the precision instruments [29], and the NVH (noise, vibration, and harshness) analysis of the vehicle [30], among others.…”

Section: Introductionmentioning

confidence: 99%

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Coupled Dynamic Analysis and Decoupling Optimization Method of the Laser Gyro Inertial Measurement Unit

Fang

Zeng

2019

Sensors

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The mechanical dithered ring laser gyro (RLG) effectively overcomes the lock-in effect and ensures the sensitive accuracy of the low angular rate for the gyro. However, in the inertial measurement unit (IMU) system, the dither excitation of three RLGs causes the coupled vibration of the IMU structure, which could seriously limit the measuring accuracy of RLGs. In this paper, the vibration frequency response characteristic of laser gyro IMU is taken as the focus point, and the method of multi-rigid body dynamics is used to establish the dynamic model of IMU suitable for vibration frequency response analysis. On the basis of the model, the multi-degree-of-freedom coupling vibration of IMU with the gyro dither excitation is clearly described. A new IMU dynamic decoupling optimization method is proposed to minimize the coupled vibration frequency response, and compared with the previous optimal design method. The prototype experimental test results show that the coupled vibration of IMU is restrained more effectively by the proposed new method than by the previous optimal design method. Finally, on the basis of this new method, the measuring accuracy of the RLGs in the IMU system is improved, which is quite useful for practical engineering application.

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Section: Structure Components Of Laser Gyro Imumentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Coupled Dynamic Analysis and Decoupling Optimization Method of the Laser Gyro Inertial Measurement Unit

Fang

Zeng

2019

Sensors

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“…The DMF was a subject of intensive research [1][2][3][4][5][6][7][8], and has been used in passenger car since the 1980s [9]. To increase the quality of vibration attenuation, the concept of a DMF began to be modified by incorporating additional spring-mass components by combining with a so-called centrifugal pendulum vibration absorber, and additional absorbers with smooth and non-smooth nonlinearities [9][10][11][12][13][14]. Interesting research is ongoing on the development of controlled DMF for torsional vibration attenuation in powertrain systems using controllable magnetorheological elastomeric springs and an appropriate controller design [15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Weight-Vibration Pareto Optimization of a Triple Mass Flywheel for Heavy-Duty Truck Powertrains

Berbyuk

2020

Machines

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Enhanced efficiency of heavy-duty truck powertrains with constraints imposed on noise, vibration, and harshness requires novel solutions for torsion vibrations attenuation. In the paper, the weight-vibration Pareto optimization problem for a novel vibration absorber, a triple mass flywheel, for application in heavy-duty truck powertrains is considered. Global sensitivity analysis and Pareto optimization method are used to design a novel vibration absorber. The optimization method attempts to minimize oscillations of the torque at the transmission input shaft as well as to minimize total mass inertia of the absorber. It is shown that there exists a Pareto front between the measure of the attenuation of oscillations of the torque and the total mass inertia of a triple mass flywheel. The optimized design parameters for the absorber are obtained that provide the best attenuation of oscillations of the torque at the transmission input shaft for different mean values of the engine driving torque. The analysis shows real evidence of the feasibility of the application of this concept of vibration absorbers in heavy-duty truck powertrains. It is also shown that optimized design parameters of a triple mass flywheel put this concept in a superior position in comparison with a dual mass flywheel.

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“…Nonlinear dynamics of PGT with piecewise nonlinearities of SOWCs under the influences of floating sun gear, floating planet carrier, and floating ring gear of the PGT are unknown. Additionally, attenuation of torsional oscillations is important in automotive powertrains [23][24][25][26]. Optimal design of the stiffness and damping of a clutch is one method to reduce torsional oscillations [27][28][29].…”

Section: Introductionmentioning

confidence: 99%

Nonlinear Dynamics of a Power-Split Transmission Unit with a Planetary Gear Train and Selectable One-Way Clutches

Jia

2020

Complexity

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A Planetary Gear Train (PGT) can be used in series-parallel transmission to redistribute powers. Selectable one-way clutches (SOWCs), compared with traditional friction clutches, can simplify controls and diversify patterns especially for hybrid transmissions. In this paper, a nonlinear torsional model of a power-split PGT coupled with three SOWCs is proposed. Piecewise nonlinearities of SOWCs as well as clearance, time-varying mesh stiffness, and synthetic transmission error of the PGT are considered. With a specified group of comprehensive evaluation indices, influences of piecewise nonlinearities of SOWCs are explored. Simulation results show that the piecewise nonlinearities of SOWCs can diminish collision range and reduce resonances of the PGT. Further research studies on parameter configurations of each SOWC reveal that of the three SOWCs, stiffness and radius of the SOWC connected to the sun gear of the PGT are dominant factors. Large stiffness and effective radius of the SOWC render the PGT fall into chaos on lower meshing frequencies; however, enormous impact vibrations occur to the SOWC if it gets too soft. Additionally, the increase of the damping ratio of the SOWC connected to sun gear can distinctly reduce the vibration and maximum dynamic load of the system on the entire working range.

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On the effect of multiple parallel nonlinear absorbers in palliation of torsional response of automotive drivetrain

Cited by 54 publications

References 30 publications

Coupled Dynamic Analysis and Decoupling Optimization Method of the Laser Gyro Inertial Measurement Unit

Coupled Dynamic Analysis and Decoupling Optimization Method of the Laser Gyro Inertial Measurement Unit

Weight-Vibration Pareto Optimization of a Triple Mass Flywheel for Heavy-Duty Truck Powertrains

Nonlinear Dynamics of a Power-Split Transmission Unit with a Planetary Gear Train and Selectable One-Way Clutches

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