Multi-harmonic active structural acoustic control of a helicopter main transmission noise using the principal component analysis

Bélanger, Pierre; Berry, Alain; Pasco, Yann; Robin, Olivier; St-Amant, Yves; Rajan, Sreeraman

doi:10.1016/j.apacoust.2007.12.007

Cited by 31 publications

(11 citation statements)

References 7 publications

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“…In the automotive environment a variety of active control systems have been proposed for both engine [2] and road noise control [3]. More broadly, active control technology has been applied to fan noise [4], active earmuffs [5], noise transmission through windows [6], sound radiation from a helicopter transmission [7] and diesel generator noise in the master cabin of a luxury yacht [8].…”

Section: Introductionmentioning

confidence: 99%

A Local Active Noise Control System Based on a Nonlinear Sensing Technique for Yacht Applications

Mylonas¹,

Erspamer²,

Paradisiois³

et al. 2020

XI International Conference on Structural Dynamics

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Section: Introductionmentioning

confidence: 99%

A Local Active Noise Control System Based on a Nonlinear Sensing Technique for Yacht Applications

Mylonas¹,

Erspamer²,

Paradisiois³

et al. 2020

XI International Conference on Structural Dynamics

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“…Published studies directly or indirectly use the structure and excitation symmetries to capture vibration nature. The studies can be roughly considered in three groups: typical vibration modes [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21], planet phasing [1,3,[22][23][24][25][26][27][28][29][30][31][32][33][34][35], and sideband [35][36][37][38][39][40][41][42][43][44], where the first group relates free vibration, but the last two link forced and parametric ones induced by the mesh or planet-pass excitations. Regardless of excitation patterns, free or forced, rigid or elastic, or even rigid-elastic coupling vibrations, motivations on the problem-solution method or physical explanations on the vibrations...…”

Section: Introductionmentioning

confidence: 99%

Investigation on Mesh and Sideband Vibrations of Helical Planetary Ring Gear Using Structure, Excitation and Deformation Symmetries

Wang

Meesap

2018

Chin. J. Mech. Eng.

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Time-variant excitations in planetary gear trains can cause excessive noise and vibration and even damage the system on a permanent basis. This paper focuses on the elastic vibrations of a helical planetary ring gear subjected to mesh and planet-pass excitations. Motivated by the structure, excitation and deformation symmetries, this paper proposes dual-frequency superposition and modulation methods to capture the mesh and sideband vibrations. The transition between ring gear tooth and planet is introduced to address the excitations and vibrations. The phasing effect of ring gear tooth and planet on various deformations is formulated. The inherent connections between the two types of vibrations are identified. The vibrations share identical exciting rules and the wavenumber and modulating signal order both equal the linear combination of tooth and planet counts. The results cover in-plane bending and extensional, out-of-plane bending and torsional deformations. Main findings are verified by numerical calculation and comparisons with the open literature. The analytical expressions can be used to determine whether the sideband is caused by component fault or only by elastic vibration. The methods can be extended to other power-transmission systems because little restriction is imposed during the analysis. which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

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“…Feedforward control, which is more effective in the case where the deterministic or correlated information about the disturbance is known, is another popular control strategy. It was widely used in active vibration and noise control field [26,27]. However, only a few feedforward theories were utilized in structural vibration control with ACLD treatments.…”

Section: Introductionmentioning

confidence: 99%

Active Vibration Control of Plate Partly Treated with ACLD Using Hybrid Control

Zhang

Zheng

2014

International Journal of Aerospace Engineering

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A finite element model of plate partly treated with ACLD treatments is developed based on the constitutive equations of elastic, piezoelectric, viscoelastic materials and Hamilton’s principle. The Golla-Hughes-Mctavish (GHM) method is employed to describe the frequency-dependent characteristics of viscoelastic material (VEM). A model reduction is completed by using iterative dynamic condensation and balance model reduction method to design an effective control system. The emphasis is concerned on hybrid (combined feedback/feedforward) control system to attenuate the vibration of plates with ACLD treatments. The optimal linear quadratic Gaussian (LQG) controller is considered as a feedback channel and the adaptive filtered-reference LMS (FxLMS) controller is used as a feedforward channel. They can be utilized individually or in a hybrid way to suppress the vibration of plate/ACLD system. The results show that the hybrid controller which combines feedback/feedforward together can reduce the displacement amplitude of plate/ACLD system subjected to a complicated disturbance substantially without requiring more control effort. Furthermore, the hybrid controller has more rapid and stable convergence rate than the adaptive feedforward FxLMS controller. Meanwhile, perfect robustness to phase error of the cancellation path in feedforward controller and the weight matrices in feedback LQG controller is demonstrated in proposed hybrid controller. Therefore, its application in structural engineering can be highly appreciated.

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Multi-harmonic active structural acoustic control of a helicopter main transmission noise using the principal component analysis

Cited by 31 publications

References 7 publications

A Local Active Noise Control System Based on a Nonlinear Sensing Technique for Yacht Applications

A Local Active Noise Control System Based on a Nonlinear Sensing Technique for Yacht Applications

Investigation on Mesh and Sideband Vibrations of Helical Planetary Ring Gear Using Structure, Excitation and Deformation Symmetries

Active Vibration Control of Plate Partly Treated with ACLD Using Hybrid Control

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