Inexpensive Implementation of Active Noise Control Systems for Acoustic Duct with Application to a Ventilation System

Kobayashi, Yasuhide; Fujioka, Hisaya

doi:10.1299/kikaic.72.3751

Cited by 3 publications

(6 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In this section, both adaptive and robust controllers are examined, where each adaptive controller for cases (a) and (b) is determined as a fixed 100th IIR filter by using the filtered-U RLMS method (see [2] for design process in detail), while the controller for case (c) is determined as a single-input-double-output fixed 100th IIR filter by using the multiple-channel filtered-U RLMS method [6]. Figure 6 shows adaptive and robust controllers for cases (a) and (b).…”

Section: Comparison Of Controllersmentioning

confidence: 99%

“…In the previous study [2], by assuming that temperature variation is small as in recent energy-efficient houses so that time-invariant controller can achieve sufficient performance, two types of time-invariant low-order controllers are compared: one is based on the conventional adaptive filter (the filtered-U recursive LMS algorithm) but the coefficients are fixed by the stationary values. Another is obtained by a robust control method (sampled-data H ∞ control).…”

Section: Introductionmentioning

confidence: 99%

“…It would be worth mentioning that there have been many studies that deal with the design problem for duct active noise control systems not only in the adaptive control framework [1,6] but also in the robust control framework [7][8][9][10] under the simple duct setup, while the comparison of the adaptive and robust control with a real ventilation system has been firstly reported in [2]. Furthermore, robust control system with Swinbanks' source has not been studied yet.…”

Section: Introductionmentioning

confidence: 99%

“…Figure 1 and Table 1 show the block diagram and instalments of the experimental apparatus which are the same in [2] except that SPK3 and the corresponding D/A channel are attached so that Swinbanks' source is composed of the pair of loudspeakers, SPK2 and SPK3. In addition, for simplicity of robust control design in this paper, SPK1 is used as a noise source in the modeling stage of robust control design to examine frequency response of the plant model, while in [2] actual fan noise is used. Figure 2 shows the configuration of the ventilation system installed in a two-stored real house which is also the same as in [2].…”

Section: Introductionmentioning

confidence: 99%

“…In addition, for simplicity of robust control design in this paper, SPK1 is used as a noise source in the modeling stage of robust control design to examine frequency response of the plant model, while in [2] actual fan noise is used. Figure 2 shows the configuration of the ventilation system installed in a two-stored real house which is also the same as in [2]. The grilles are attached to the ceiling of each floor, and the ANC system is connected between fresh-air grilles and the ventilation fan.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Active Noise Cancellation for Ventilation Ducts Using a Pair of Loudspeakers by Sampled‐Data ℋ_∞ Optimization

Kobayashi

Fujioka

2008

Advances in Acoustics and Vibration

Self Cite

View full text Add to dashboard Cite

We deal with the design of active noise control systems for ventilation ducts with a pair of loud-speakers based on sampleddata H ∞ optimization, in order to improve our previous study with a single loudspeaker. The resultant controller requires lower computational complexity for the implementation, compared to the standard time-varying adaptive controllers, since it is time-invariant and the order is comparable. Moreover, the effect of Swinbanks' source is automatically recovered by the H ∞ optimization. The benefit of the proposed method is also confirmed from experimental results for a real house, where the achieved noise attenuation level is about twice as much as that of the single loudspeaker case.

show abstract

Section: Comparison Of Controllersmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Active Noise Cancellation for Ventilation Ducts Using a Pair of Loudspeakers by Sampled‐Data ℋ_∞ Optimization

Kobayashi

Fujioka

2008

Advances in Acoustics and Vibration

Self Cite

View full text Add to dashboard Cite

show abstract

Acoustic radiation at opening with movable louver ANC system

Yanagimoto¹,

Watanabe²,

Suzuki³

et al. 2016

Transactions of the JSME (In Japanese)

View full text Add to dashboard Cite

This paper describes an active noise control technique to suppress the transmitted sound from a movable louver that is attached to a ventilation aperture and machinery opening. In this experimental study, proposed ANC (Active Noise Control) system is independent parallel control system using two IMC (Internal Model Control) feedback ANC systems. Each system is controlled using filtered-X LMS algorithm to minimize sound pressure at error microphone. One of them, louver-ANC system which secondary noise source is set at each bottom side of the louver vane. An opening of each movable louver vane is one-dimensional space similarly a duct. Transmitted sound is attenuated in this area which error microphone was set on outside near louver opening. The other one is slit-ANC system that is installed on an opening of machinery wall. The slit-ANC system is combined a slit resonator with active noise control. The slit resonator with ventilation aperture composed of thin air layer expanded with very short wall width is useful to reduce leakage noise at machinery wall. The thin air layer acts an acoustic resistance, inertance and capacitance. The secondary noise source oscillates the air layer with appropriate amplitudes and phases. The error microphone is located same position in case of the louver-ANC system. The rectangular slit resonator is designed to reduce resonant frequencies of an enclosure box in this experiment. Noise reduction is visualized by sound intensity measurement system, and sound power is calculated by distribution of sound intensity. The experimental results show that noise reduction is obtained from 5 dB to 13 dB of sound power in sound field on this proposed ANC system. And it is expected that the transmission loss of movable louver will be able to improve by using independent parallel control system of louver-ANC and slit-ANC.

show abstract

Experience and perspectives of using active noise and vibration control for reduction of low frequency noise and vibration in gas guide systems of power plants

Vasilyev¹

2020

Vib. proced.

View full text Add to dashboard Cite

One of the main reasons of generation of intensive noise and vibration in low frequency range are gas pressure pulsations (oscillations) in gas guide systems of power plants. Active noise and vibration control now is considered as efficient method of low frequency noise and vibration for different applications, including reduction of low frequency noise and vibration in gas guide systems of power plants. Results of analysis of application of active noise and vibration control systems for the reduction of power plants low frequency noise and vibration are described. The examples are showing high possibilities and efficiency of active noise and vibration control method. In a meantime, existing constructions of ANVC systems are having some drawbacks. Author’s experience of development of constructions and technical solutions of ANVC systems for reduction of low frequency noise and vibration in power plants gas guide systems is presented. Further perspectives of increasing of efficiency of ANVC control of low frequency noise and vibration reduction generated by power plants are discussed.

show abstract

Inexpensive Implementation of Active Noise Control Systems for Acoustic Duct with Application to a Ventilation System

Cited by 3 publications

References 0 publications

Active Noise Cancellation for Ventilation Ducts Using a Pair of Loudspeakers by Sampled‐Data ℋ_∞ Optimization

Active Noise Cancellation for Ventilation Ducts Using a Pair of Loudspeakers by Sampled‐Data ℋ_∞ Optimization

Acoustic radiation at opening with movable louver ANC system

Experience and perspectives of using active noise and vibration control for reduction of low frequency noise and vibration in gas guide systems of power plants

Contact Info

Product

Resources

About

Inexpensive Implementation of Active Noise Control Systems for Acoustic Duct with Application to a Ventilation System

Cited by 3 publications

References 0 publications

Active Noise Cancellation for Ventilation Ducts Using a Pair of Loudspeakers by Sampled‐Data ℋ∞ Optimization

Active Noise Cancellation for Ventilation Ducts Using a Pair of Loudspeakers by Sampled‐Data ℋ∞ Optimization

Acoustic radiation at opening with movable louver ANC system

Experience and perspectives of using active noise and vibration control for reduction of low frequency noise and vibration in gas guide systems of power plants

Contact Info

Product

Resources

About

Active Noise Cancellation for Ventilation Ducts Using a Pair of Loudspeakers by Sampled‐Data ℋ_∞ Optimization

Active Noise Cancellation for Ventilation Ducts Using a Pair of Loudspeakers by Sampled‐Data ℋ_∞ Optimization