Active Noise Control Using a Body-Mounted Vibration Actuator to Enhance the Interior Sound of Vehicle

Chang, Kyoung-Jin; Park, Dong Chul; Lee, Young-Sup

doi:10.1007/s12239-022-0030-1

Cited by 4 publications

(3 citation statements)

References 6 publications

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“…Chang's research, there is a problem with the long impulse response function of the secondary path due to the excitation of the vehicle body panel degrading control stability. 9 So this study will focus on the ANC method that excites around the engine mounts.…”

Section: Comparison With the Case Of Exciting Body Panelsmentioning

confidence: 99%

“…Chang's study, where vibration actuators are attached to body panels near a passenger compartment that are effective for sound radiation, such as cowl top panels, and error microphones are set up in the vehicle to apply the Filtered-x Least Mean Square (FxLMS) algorithm. 9 This method has the advantage of being able to control structure borne noise with a small number of vibration actuators. However, since the secondary path is long and different from the primary path, various supplementary algorithms are necessary to improve control stability in vehicles.…”

Section: Introductionmentioning

confidence: 99%

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Development of a Systematic Methodology for Active Noise Control with Vehicle Engine Mounts Excitation

Chang,

Roberts

2023

The International Journal of Acoustics and Vibration

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Active noise control (ANC) technology using speakers as actuators has an excellent performance, but since it generates anti-noise signals in a path completely different from the vehicle's noise source, performance can be greatly reduced at a location far from the error sensor, and this problem can get worse as the frequency to be controlled increases. Another approach is the vibration-based ANC technology that excites the body member around the engine mount and reduces acoustic error signals in a passenger compartment. This approach has the advantage of being effective even at a distance from the error sensor and reducing vibration and noise together when trying to cancel out the structure borne noise generated by the engine because the paths from the primary source and the secondary source to the interior are almost identical. This paper presents a systematic methodology for this vibration-based ANC technology to achieve high performance in vehicles. First, through noise reduction simulation, the number of error sensors, the location of actuators, the force requirements, and an appropriate system are proposed. Next, to improve performance even with a small number of actuators and limited power when applying this technology in vehicles, an algorithm using the control effort weighting parameter is introduced into the existing FxLMS algorithm and modelled on the controller. Finally, a noise reduction control test is performed in a vehicle under static and driving conditions, and the results are reviewed.

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Section: Comparison With the Case Of Exciting Body Panelsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Development of a Systematic Methodology for Active Noise Control with Vehicle Engine Mounts Excitation

Chang,

Roberts

2023

The International Journal of Acoustics and Vibration

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“…The simulation results verify the passability of the proposed scheme. Chang et al 18 investigated a sound generation method using vibration actuators and microphones in order to fit to obtain similar engine sounds in an electric vehicle. The results show that the method can perform noise cancellation well and will be a new form of sound system for modifying noise to achieve the target sound.…”

Section: Introductionmentioning

confidence: 99%

Research on active sound control in EV in-vehicle based on engine order sound fitting

Zhang

Cao

et al. 2023

Advances in Mechanical Engineering

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In order to upgrade the comfort and dynamic feeling of the sound in the cabin of electric vehicle acceleration and uniform driving, this paper conducted a study on active sound making control in EVs based on sound fitting. Sound fitting was analyzed by short-time Fourier technique (STFT), sound extraction and synthesis was tested by STFT and synthesis method was conducted by Kaiser window function. A study on the sound requirements of a Class A EV was completed, in which a sound design method integrated three objective dimensions of sound amplitude strengthening, energy distribution, and order composition in the vehicle speed range, so as to determine the sound design scheme of accelerated driving with both comfort and dynamic sense. By comparing the characteristics of two kinds of engine sound extraction, the correlation between dynamic sensation and engine sound amplitude was analyzed, and the active sound parameter selection was confirmed under two conditions of acceleration and uniform speed. Efforts were devoted to conduct the active sound system program workflow diagram and system hardware design and testing, and to complete the active sound generation system (ASGS) formation and accuracy testing of the electric vehicle based on the audio system speaker, and additionally the sound calibration and target verification of the ASGS under the static conditions of the real vehicle were carried out. The objective test shows that the ASGS reduces the sharpness under the two working conditions of acceleration and constant speed to 1.0 and 0.52 acum respectively, which effectively alleviates the uncomfortable feeling brought by the high-frequency order sound, and proves that the ASGS can enhance the comfort and dynamic quality characteristics of the electric vehicle interior sound.

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Semi-Adaptive Vibration Controller for Generating the Target Acceleration of the Subsystem in a Prototype Car

Jung,

Lee,

et al. 2024

SAE Technical Paper Series

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<div class="section abstract"><div class="htmlview paragraph">This research aims to develop an inverse controller to track target vibration signals for the application to car subsystem evaluations. In recent times, perceptive assessments of car vibration have been technically significant, particularly parts interacting with passengers in the car such as steering wheels and seats. Conventional vibration test methods make it hard to track the target vibration signals in an accurate manner without compensating for the influence of the transfer function. Hence, this paper researched the vibration tracking system based on inverse system identification and digital signal processing technologies. Specifically, the controller employed a semi-active algorithm referring to both the offline modeling of the inverse system and the adaptive control. The semi-active controller could reconstruct the target vibration signal in a more efficient and safer way. The proposed methodology was first confirmed through computation simulations using Simulink. The simulation results verified that the semi-active controller could outperform the conventional active controller with respect to converging speed and stability. Following the simulation studies, actual vibration tests validated the suggested method in a steering wheel. A weight disturbance of about 0.24 kg was attached to the steering wheel to realize the possible change in the system characteristics. The semi-active controller could successfully track target vibration, such as a single or a dual harmonic signal, at the target spot of the steering wheel within the control error of about 1.6 dB regardless of the variation of the system transfer function. The proposed semi-active controller will provide an accurate, efficient tracking of vibrations in the evaluation of car subsystems.</div></div>

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Active Noise Control Using a Body-Mounted Vibration Actuator to Enhance the Interior Sound of Vehicle

Cited by 4 publications

References 6 publications

Development of a Systematic Methodology for Active Noise Control with Vehicle Engine Mounts Excitation

Development of a Systematic Methodology for Active Noise Control with Vehicle Engine Mounts Excitation

Research on active sound control in EV in-vehicle based on engine order sound fitting

Semi-Adaptive Vibration Controller for Generating the Target Acceleration of the Subsystem in a Prototype Car

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