A New Method for Active Cancellation of Engine Order Noise in a Passenger Car

Lee, Sang Kwon; Lee, Seungmin; Back, Jiseon; Shin, Taejin

doi:10.3390/app8081394

Cited by 41 publications

(21 citation statements)

References 22 publications

(40 reference statements)

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“…However, it can lead to performance degradation due to the low data rates and delays [3]. In powertrain noise control, the fast convergence speed of the controller is critical because the engine speed changes rapidly, such as under full-load conditions [14]- [16]. Therefore, many adaptive filters with variable step size have been proposed [17]- [19].…”

Section: Introductionmentioning

confidence: 99%

A Complementary Effect in Active Control of Powertrain and Road Noise in the Vehicle Interior

Kim

Altınsoy

2022

IEEE Access

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This study shows that a concurrent active noise control strategy for engine harmonics and road noise has a complementary effect. In particular, we found that engine booming noise is additionally attenuated when road noise control is concurrently used with engine harmonics control; an additional attenuation of 2.08 dB and 1.25 dB for the C1.5 and C2.0 orders, respectively, was achieved. A parallel multichannel feedforward controller for non-stationary narrowband engine harmonics and broadband road noise was designed and implemented to reduce noise in all four seats. Two control signals were considered independent because the reference signals, engine revolution speed for the engine harmonic controller, and acceleration signal for the road noise controller are uncorrelated. However, if the reference sensor for the road noise controller is installed along the overlapping transfer path between the engine noise and road noise, the engine noise may also be suppressed by the control signal for the road noise attenuation. Based on transfer path analyses for both engine harmonics and road noise, the optimal positions for the reference sensors were selected. In addition, we identified several overlapping transfer paths between the engine booming noise and road noise. A practical active noise control system combined with a remote microphone technique was implemented for a large six-cylinder sedan using a vehicle audio system to evaluate the noise attenuation performance. The experiments showed that the interior noise from the engine and road excitation was effectively suppressed by the proposed concurrent control strategy.

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Section: Introductionmentioning

confidence: 99%

A Complementary Effect in Active Control of Powertrain and Road Noise in the Vehicle Interior

Kim

Altınsoy

2022

IEEE Access

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“…Many researchers have used ANC techniques in the past successfully in various applications like reducing car engine noise. 6,7 Shi et al 8 observed that ANC was ideal for reducing low-frequency noise and was an incomparable addition to passive noise control. Narula et al 9 demonstrated ANC using Simulink and data acquisition toolbox; adaptive filters were used in real-time environment.…”

Section: Introductionmentioning

confidence: 99%

Design and fabrication of active noise control system for a grass cutter

Khan

Muzammil²,

Farooq³

2021

Noise & Vibration Worldwide

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Active noise control technique was used to reduce noise generated by a grass cutting machine. Grass cutting machine running on a diesel engine generates loud noise of about 105 dBA. Based on the spectral analysis of engine noise, it was observed that frequencies in the range of 440–5000 Hz were having more noise power. An active noise control circuit was designed and fabricated using operational amplifiers. The active noise control circuit was tested with the help of a duct made of thermocol. Results show that reduction in noise up to 10 dBA was obtained when the active noise control circuit was used with a duct made of thermocol, while a reduction up to 5 dBA was obtained when used on a grass cutting machine. The active noise control system developed may be used to reduce noise generated by a grass cutting machine.

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“…The undesired noise is reduced by emitting a sound signal with the same amplitude and opposite phase by means of an electroacoustic actuator [3]. Several ANC solutions have been tested in many industrial and automotive applications, e.g., portable generators [4], automotive [5,6] and locomotive [7] mufflers, car [8], aircraft [9] and yacht [10] cabins, ventilation ducts [11], power transformers [12], sound-proof windows [13], up to the well-known active headsets.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation on the potential of the Feedback Fx-LMS Active Noise Control technology for use in industrial generator sets

et al. 2021

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Active Noise Control (ANC) has been considered a promising technology for the abatement of acoustic noise from the mid-20th century. Feedback and Feedforward ANC algorithms, based on the destructive interference principle applied to acoustic waves, have been developed for different applications, depending on the spectrum of the noise source. Feedback ANC algorithms make use of a single control microphone to measure an error signal which is then employed by an adaptive filter to estimate the noise source and generate an opposite-phase control signal. The Fx-LMS (Filtered-X Least Mean Square) algorithm is mostly adopted to update the filter. Feedback ANC systems have proven to be effective for the abatement of low-frequency quasi-steady noises; however, different challenges must be overcome to realize an effective and durable system for high-temperature application. This paper aims at experimentally assessing the feasibility of a Feedback Fx-LMS ANC system with off-line Secondary Path estimation to be used in mid-size diesel gensets for the reduction of the exhaust noise. Several solutions are proposed, including the mechanical design, the development of the Fx-LMS algorithm in the LabVIEW FPGA programming language, and the key features required to prevent parts from thermal damage and fouling. The developed prototype was implemented on a 50-kW diesel genset and tested in a semi-anechoic chamber. The noise abatement inside the exhaust pipe and at different measurement points around the machine was evaluated and discussed, showing good potential for improving the acoustic comfort of genset users.

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A New Method for Active Cancellation of Engine Order Noise in a Passenger Car

Cited by 41 publications

References 22 publications

A Complementary Effect in Active Control of Powertrain and Road Noise in the Vehicle Interior

A Complementary Effect in Active Control of Powertrain and Road Noise in the Vehicle Interior

Design and fabrication of active noise control system for a grass cutter

Experimental investigation on the potential of the Feedback Fx-LMS Active Noise Control technology for use in industrial generator sets

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