Active Torque Cancellation for Transmitted Vibration Reduction of Low Cylinder Count Engines

Ayana, Elias; Plahn, P.; Wejrzanowski, Krzysztof; Mohan, Ned

doi:10.1109/tvt.2011.2159255

Cited by 11 publications

(10 citation statements)

References 9 publications

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“…Indeed, the idea of coupling engines to reduce torque variations is not new. Multi-cylinder internal combustion engines reduce torsional vibrations [6,7]. However, exploring this principle for inertia-less operation of gyrating engines is new and may help elucidate the functionality of certain biomolecular gyrating engines.…”

Section: Introductionmentioning

confidence: 99%

Inertialess Gyrating Engines

Siches¹,

Miangolarra²,

Taghvaei³

et al. 2022

Preprint

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A typical model for a gyrating engine consists of an inertial wheel powered by an energy source that generates an angle-dependent torque. Examples of such engines include a pendulum with an externally applied torque, Stirling engines, and the Brownian gyrating engine. Variations in the torque are averaged out by the inertia of the system to produce limit cycle oscillations. While torque generating mechanisms are also ubiquitous in the biological world, where they typically feed on chemical gradients, inertia is not a property that one naturally associates with such processes. In the present work, seeking ways to dispense of the need for inertial effects, we study an inertia-less concept where the combined effect of coupled torque-producing components averages out variations in the ambient potential and helps overcome dissipative forces to allow sustained operation for vanishingly small inertia. We exemplify this inertia-less concept through analysis of two of the aforementioned engines, the Stirling engine and the Brownian gyrating engine. An analogous principle may be sought in biomolecular processes as well as in modern-day technological engines, where for the latter, the coupled torque-producing components reduce vibrations that stem from the variability of the generated torque.

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Section: Introductionmentioning

confidence: 99%

Inertialess Gyrating Engines

Siches¹,

Miangolarra²,

Taghvaei³

et al. 2022

Preprint

View full text Add to dashboard Cite

show abstract

“…Besides, many researchers have also been trying to proposing active mitigation of the vibration. Ayana et al 22 designed an effectively active torque cancellation scheme to reduce transmitted vibration by an order of magnitude at targeted frequencies which does not require the over sizing of machine or power electronics components. To quickly evaluate the electromagnetic vibration emitted by a PMSM in a fractionalhorsepower drive, Torregrossa et al 23 proposed a novel approach based on field reconstruction method, which reduce the vibration in the targeted machine by 35%.…”

Section: Introductionmentioning

confidence: 99%

“…Ayana et al. 22 designed an effectively active torque cancellation scheme to reduce transmitted vibration by an order of magnitude at targeted frequencies which does not require the over sizing of machine or power electronics components. To quickly evaluate the electromagnetic vibration emitted by a PMSM in a fractional-horsepower drive, Torregrossa et al.…”

Section: Introductionmentioning

confidence: 99%

Multi-objective robust optimization design for powertrain mount system of electric vehicles

Xin

Qian

et al. 2017

Journal of Low Frequency Noise, Vibration and Active Control

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A multi-objective robust optimization scheme for the powertrain mount system of an electric vehicle is proposed in this paper. A permanent magnet synchronous motor model is established by taking account of the effects of magnetic saturation and space harmonics, in which the d-q-axis inductance and the flux linkage excited by permanent magnet were obtained by finite element method. The rippled output torque of the permanent magnet synchronous motor mixed with harmonic components is obtained with the New European Driving Cycle as the running condition of the electric vehicle. A six degree-of-freedoms (DOFs) powertrain mount system is established and the response of the system is obtained with the rippled torque as the excitation input. A multi-objective optimization model of the powertrain mount system is built with the stiffness's of the mounts as the design variables, and with the goal of maximizing the decoupling rates and minimizing the dynamic reaction forces of the mounts acting on the car body. Genetic algorithm is used to conduct the global optimization and all the Pareto optimal solutions are found out based on the optimization theory, and the solution with the optimal robustness of dynamic reaction force is obtained by Latin hypercube sampling method. The results show that with the proposed multi-objective robust optimization scheme applied for the parameters optimization of the motor mount system, the decoupling rates increase obviously, the dynamic reaction force decreases apparently, and the optimization result shows good robustness. The optimization results can make the powertrain mount system of electric vehicles processing of optimal dynamic response characteristics correspondingly.

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“…This usually compromises the noise performance. Yet another solution would be to attenuate the roll motion (around the crank shaft axis) of the engine by using Active Torque Cancellation (ATC) [2]. If the roll motion of the engine is the cause for exciting the offending vibration mode, ATC could be used to cancel the roll motion at the specific frequency using an electric machine that is coupled to the crankshaft.…”

Section: Introductionmentioning

confidence: 99%

Torque impulse for experimental modal analysis in transmitted vibration study of engine-generators

Ayana

Seidlitz

Cheah

et al. 2010

2010 Twenty-Fifth Annual IEEE Applied Power Electronics Conference and Exposition (APEC)

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Experimental modal analysis is used to measure the dynamic characteristics of a structure. Traditionally, excitation is provided with either a shaker or an impulse hammer. An alternative approach is to use power electronics for powering the generator; generating a torque impulse. This torque excitation replicates much of the engine's excitation, emphasizing the vibrational modes that are assorted with the generator set's transmitted vibration. Basic system setup for modal analysis using torque impulse, comparison with conventional impulse hammer test, and illustrations of some of the flexibilities inherent in torque impact testing are included.

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Active Torque Cancellation for Transmitted Vibration Reduction of Low Cylinder Count Engines

Cited by 11 publications

References 9 publications

Inertialess Gyrating Engines

Inertialess Gyrating Engines

Multi-objective robust optimization design for powertrain mount system of electric vehicles

Torque impulse for experimental modal analysis in transmitted vibration study of engine-generators

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