Active control system for low-frequency road noise combined with an audio system

Sano, Hisashi; Inoue, Taiki; Takahashi, Akihiro; Terai, Kenichi; Nakamura, Yoshio

doi:10.1109/89.952494

Cited by 98 publications

(47 citation statements)

References 6 publications

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“…20,21 Although such controllers have been successfully applied in active noise cancelling headphones and headrests, 22 their application to active road noise systems is limited to the control of single, problematic, acoustic modes. 14,15,4 Therefore, it is interesting to first consider the performance limitations on the SISO control system shown in Figure 1b when the system is optimised to minimise a single error signal.…”

Section: Single-input Single-output Controlmentioning

confidence: 99%

“…Feedback control of road noise has been the focus of research presented by Adachi and Sano, for example, 14,15 which led to a massproduction system implemented in the Honda Accord estate car. 4 This single channel control system achieves 10 dB reduction in a narrowband 40 Hz boom in the front seats, which corresponds to the first longitudinal enclosure mode of this vehicle, whilst avoiding enhancements in the rear seat positions.…”

Section: Introductionmentioning

confidence: 99%

“…This is particularly true when the active noise control systems are integrated into the vehicle's electronic systems, for example, by employing the car audio loudspeakers. 4 Low frequency engine noise has been successfully controlled using feedforward control systems employing an engine speed reference signal, low cost microphone error sensors and the car audio loudspeakers as control sources 5 . In a feedforward control system, as illustrated in Figure 1a, the control signal is generated by filtering the reference signal, x, which is correlated with the noise to be controlled, with filters that are adapted to minimise the error signals.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The Design and Performance of Feedback Controllers for the Attenuation of Road Noise in Vehicles

Cheer¹,

Elliott²

2014

IJAV

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Active noise control systems offer a potential method of reducing the weight of acoustic treatments in vehicles and, therefore, of increasing fuel efficiency. The commercialisation of active noise control has not been widespread, however, partly due to the cost of implementation. This paper investigates the design and performance of feedback road noise control systems, which could be implemented cost-effectively by using the car audio loudspeakers as control sources and low-cost microphones as error sensors. Three feedback control systems are investigated, of increasing complexity: a single-input single-output (SISO) controller; a SISO controller employing weighted arrays of error sensors and control sources; and a fully-coupled multi-input multi-output (MIMO) controller. For each of the three controllers robustness and disturbance enhancement constraints are defined and by formulating the three controllers using an Internal Model Control (IMC) architecture, and using frequency discretisation, the constrained optimisation problems are solvable using sequential quadratic programming. The performance of the three controllers and the associated design methods are first evaluated in a simulated environment, which allows the physical limits on performance to be understood. Finally, to validate the results in the simulated environment, the performance of the three controllers has been calculated using data measured in a car cabin and it has been shown that the fully-coupled MIMO controller is able to achieve significant low frequency road noise control, at the expense of increased implementation complexity compared to the SISO and SISO weighted transducer arrays feedback controllers.

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Section: Single-input Single-output Controlmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The Design and Performance of Feedback Controllers for the Attenuation of Road Noise in Vehicles

Cheer¹,

Elliott²

2014

IJAV

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“…Low frequency noise is difficult to control using lightweight passive measures, and since active noise control systems are most effective at low frequencies and may be implemented within a car with relatively little increase in weight, they offer a convenient complementary solution. This is particularly true when the active noise control systems are integrated into the vehicle's electronic systems, for example, by employing the car audio loudspeakers [4].…”

Section: Introductionmentioning

confidence: 99%

Multichannel feedback control of interior road noise

Cheer

Elliott

2013

The Journal of the Acoustical Society of America

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Active noise control systems offer a potential method of reducing the weight of passive acoustic treatments in vehicles and, therefore, increasing a its fuel efficiency. The active control of engine noise can be implemented cost-effectively by using the car audio loudspeakers as control sources and an array of low-cost microphones as error sensors. Such systems have been commercially implemented, but without also controlling road noise their subjective benefits may be limited. The active control of road noise using a feedforward control strategy has also been practically demonstrated, but these systems require a number of accelerometers to be mounted to the vehicle's structure to obtain a coherent reference signal and, therefore, lead to a significant implementation cost. This paper describes a multichannel feedback system for the active control of road noise, which uses an array of microphones and car audio loudspeakers that are common with ta feedforward engine noise control system. The design of the multichannel feedback controller is described and its performance is validated using offline simulations employing data measured in a small city car.

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“…As a result, an active control system for low frequency interior road noise (drumming) combined with an audio system was developed and installed in a mass-production station wagon [2][3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Development of active control system for low frequency road noise: Solutions for practical use and system configuration.

Sano

Inoue

Takahashi

et al. 2001

Acoust. Sci. & Tech.

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Active control system for low-frequency road noise combined with an audio system

Cited by 98 publications

References 6 publications

The Design and Performance of Feedback Controllers for the Attenuation of Road Noise in Vehicles

The Design and Performance of Feedback Controllers for the Attenuation of Road Noise in Vehicles

Multichannel feedback control of interior road noise

Development of active control system for low frequency road noise: Solutions for practical use and system configuration.

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