A new feedforward and feedback hybrid active noise control system for excavator interior noise

Sun, M.; Lu, Chihua; Liu, Zhien; Chen, Wan; Shen, Cunrui; Chen, Hao

doi:10.1016/j.apacoust.2022.108872

Cited by 10 publications

(2 citation statements)

References 22 publications

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“…In the feedforward active control algorithm, the filtered-x least mean square algorithm has wide applications because of its simple structure, easy realization, and good noise reduction effect [9][10][11]. When primary noise cannot be acquired, but the expected signal and error signal can be obtained simultaneously through the error sensor, the feedback system is used in active noise control [12,13]. In addition, this method has been successfully applied in some engineering projects, such as active noise reduction earplugs [14,15] and active noise reduction headrests [16,17].…”

Section: Introductionmentioning

confidence: 99%

A Simplified Frequency-Domain Feedback Active Noise Control Algorithm

Gao,

Yu,

Gao

2024

Applied Sciences

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When the adaptive filter length is increased, the calculation complexity increases rapidly because the relationship between the calculation and the adaptive filter length N contains a power function with no secondary path identification algorithm. Under the basic premise of unreduced noise reduction, herein, a simplified frequency-domain feedback active noise control algorithm is proposed. To reduce the computation complexity, the total delay is adopted as the estimated secondary path; the filtered reference signal is produced in the frequency domain by using multiplication to replace convolution calculation in the time domain and then updating the adaptive filter coefficients in the frequency domain. Therefore, the computational complexity has a logarithmic function with the increased adaptive filter length in the proposed algorithm. If the adaptive filter length is 512, the existing WSMANC algorithm’s calculation is 271,360 real number multiplications, while that of the proposed algorithm is only 38,912 real number multiplications. To verify the proposed algorithm’s stability, convergence speed, and noise reduction, the single-frequency noise, narrowband white noise, and narrowband pink noise, respectively, are used as the primary noise types in the simulations. The results show that (1) the proposed SFDFBANC algorithm can obtain similar noise reduction performance to existing algorithm, (2) the convergence rate is faster than existing algorithm, and (3) if the adaptive filter length is more than 64, the proposed algorithm exhibits a lower computational complexity.

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Section: Introductionmentioning

confidence: 99%

A Simplified Frequency-Domain Feedback Active Noise Control Algorithm

Gao,

Yu,

Gao

2024

Applied Sciences

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“…LFN is highly pervasive in buildings and is magnified by the modal field of enclosed spaces. The ANC principle has been widely adapted for LFN mitigation in rooms [6,7] and vehicles [8][9][10]. A thorough survey on ANC research and applications during the past decade can be found in [11,12].…”

Section: Introductionmentioning

confidence: 99%

Active Low-Frequency Noise Control Implementing Genetic Algorithm on Mode Coupling of a Compound Source

2023

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A system for low-frequency noise control in small, enclosed sound fields is proposed, using compound sound sources optimized by a genetic algorithm (GA). It is the integration of the developed low-Bl driver compound sources with a GA computer program in the Python language, aiming to control the modal field. The lack of appropriate free space in small rooms is critical for positioning the secondary sound sources; therefore, the proposed system has been designed to adapt to any available position. Two quadrupole topologies of the secondary compound source are applied and examined in a room. The convergence of the algorithm to the optimal solutions is attained through parametric configuration. The spatial radiation of the compound source at a single fixed position is adapted to couple with the modal noise field and attenuate it. The experimental results indicate that the proposed system can successfully control resonances of different low frequencies down to 50 Hz at multiple positions. The tonal noise attenuation reaches up to 32 dB at 100 Hz, confirming the applicability of the small subwoofer loudspeaker configurations for low-frequency control. This new method offers a practical and effective alternative to the typical abatement techniques that use distributed monopole sources in limited spaces.

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A hybrid feedforward/feedback multi-channel active control system with optimization for cancelling road noise inside a vehicle cabin

Zhang

Meng

2022

Applied Acoustics

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A new feedforward and feedback hybrid active noise control system for excavator interior noise

Cited by 10 publications

References 22 publications

A Simplified Frequency-Domain Feedback Active Noise Control Algorithm

A Simplified Frequency-Domain Feedback Active Noise Control Algorithm

Active Low-Frequency Noise Control Implementing Genetic Algorithm on Mode Coupling of a Compound Source

A hybrid feedforward/feedback multi-channel active control system with optimization for cancelling road noise inside a vehicle cabin

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