Feedback control of sound transmission through a double glazed window

Kaiser, Oliver; Pietrzko, Stanislaw; Morari, Manfred

doi:10.1016/s0022-460x(02)01259-2

Cited by 60 publications

(39 citation statements)

References 10 publications

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“…Many researchers focused on the approaches of compensating or eliminating the modelling error to achieve a better performance and faster convergence by adding extra filters for error compensation (Zhang et al, 2001, Zhang et al, 2003, Lan et al, 2002b, Lan et al, 2002a, Akhtar et al, 2004, Akhtar et al, 2005, Akhtar and Mitsuhashi, 2009 and modifying the LMS algorithm which is used for identification (Akhtar, Abe et al 2004;Akhtar, Abe et al 2005;Akhtar and Mitsuhashi 2009) There may also be computation and measurement errors and system uncertainties. The IMC (Tseng et al, 1998, Kaiser et al, 2003, Lin and Luo, 2002 and H ∞ optimal control (Bai and Lin, 1997, Bai and Lin, 1998, Petersen and Pota, 2002, Wu and Lee, 2005, Yuan, 2003 have been successfully applied in the design of robust ANC systems in ducts. Both simulated and experimental results show these approaches are effective for noise cancellation with plant uncertainties.…”

Section: Practical Problems 231 Effects Of Secondary Pathmentioning

confidence: 99%

Active control of pressure pulsation in a switched inertance hydraulic system

Pan

Johnston

Hillis

2013

Proceedings of the Institution of Mechanical Engineers, Part I:

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The nature of digital hydraulic systems may cause pressure pulsation problems. For example, switched inertance hydraulic systems (SIHS), which are applied to adjust or control flow and pressure by a means that does not rely on dissipation of power, have noise problems due to the pulsed nature of the flow. An effective method to reduce the pulsation is important to improve system performance and increase efficiency. Although passive systems to reduce the noise have been shown to be effective in many situations, their attenuation frequency range is limited and they may be bulky. Furthermore, attenuation devices based on expansion chambers, accumulators or hoses are likely to be unsuitable for SIHS as they add compliance to the system and would impair the dynamic response. This thesis is concerned with issues relating to the development of an active noise canceller for attenuating the pressure pulsation which is caused primarily by pulsed flow from high-speed valves in SIHS.Active control methods are widely and successfully applied in the area of structureborne noise (SBN) and air-borne noise (ABN) cancellation. The idea is using the intentional superposition of waves to create a destructive interference pattern such that a reduction of the unwanted noise occurs. However, applications for fluid-borne noise (FBN) attenuation based on the 'Active noise control (ANC) principle' are rare due to the restriction of the hardware and experimental apparatus in previous researches.In this thesis, an adaptive controller has been developed for active control of pressure pulsation in hydraulic system. The principle of the adaptive LMS filter and details of the controller design are described and the implementation was carried out through simulation. The designed controller was applied on a vibration test rig initially prior to the hydraulic testing in order to investigate its advantages and limitations in practice.Extensive testing on a switched inertance hydraulic rig proved that the controller, which used a piezoelectric valve with fast response and good bandwidth, is effective and that it has several advantages over previous methods, being effective for low frequency cancellation, with a quick response, and is robust and versatile. II A novel method for the accurate measurement of unsteady flowrate in a pipe was proposed. This was applied and validated on a pipe, and was shown to give good results. This method solves the difficulty for measuring the unsteady flowrate currently by using easy-measured signals, such as pressures. It can be used widely for predicting the unsteady flowrate along the pipe. III ACKNOWLEDGEMENTS

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Section: Practical Problems 231 Effects Of Secondary Pathmentioning

confidence: 99%

Active control of pressure pulsation in a switched inertance hydraulic system

Pan

Johnston

Hillis

2013

Proceedings of the Institution of Mechanical Engineers, Part I:

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“…Other works by (Kaiser et al, 2003) suggest an ANC approach through the positioning of both loudspeakers and sensors inside air cavities; and (Zhu et al, 2004) place monitoring sensors outside windows. Instead, most of the recent research was developed to verify the performances of the control provided by PZT patch actuators on opaque surfaces, both for building walls and for helicopter and airplane envelopes: in the contributions of (Kaiser et www.intechopen.com al., 2003) and (Bao and Pan, 1997) it is shown that using ANC control systems for double walls needs cavities wider than 0.1 m thick, which is not usual for standard double glazed panels.…”

Section: Active Noise Control In Glazed Enclosuresmentioning

confidence: 99%

An Active Technology for Improving the Sound Transmission Loss of Glazed Facades

Naticchia¹,

Carbonari²,

Spadoni³

2008

Robotics and Automation in Construction

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“…In [1] several approaches for active control of double panels are described: in some cases they are based on the production of a canceling wave that interferes destructively with the disturbing one; in other cases control is performed acting directly on the vibration field of structures radiating noise (ASAC). Other researchers [2] apply actuators on a double glazed window in order to control its vibrations: they suggest the use of a feedback controller, which only uses sensors and actuators in the cavity of the double glazed window, thus overcoming the problems tied to the placement of noise sensors outside the windows, suggested by [3] and [4], which is practically infeasible. This solution also requires the use of glazed facades having thick cavities which allow the insertion of loudspeakers within the same.…”

Section: Introductionmentioning

confidence: 99%

Integration of an Automated Active Control System in Building Glazed Facades for Improving Sound Transmission Loss

Naticchia¹,

Carbonari²

2005

Proceedings of the 22nd International Symposium on Automation and Robotics in Construction

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Abstract-In buildings, windows and glazed facades are often the weak link in protecting the interior from exterior noise. Since passive means for improving the Sound Transmission Loss (STL) of glazed facades are very expensive and are effective only at high frequencies, an active controller that increases the STL in the low frequency range is an attractive approach to reducing the noise level in buildings with glazed facades, guaranteeing the performance required by the 89/106/CEE European Directive, which made protection against noise a compulsory requirement for buildings. Several kinds of active control system of Sound Transmission were recently studied, whose two main applications are known as Active Noise Control (ANC) and Active Structural Acoustic Control (ASAC) systems. This paper concerns the second approach: it is based on the reduction of structural vibration, through the use of actuators bonded on the vibrating surfaces, driven by an automated control system, whose task is minimizing those vibrations, and consequently, radiated sound. A technological study aimed at choosing a suitable solution for the integration of such automated control systems in buildings with glazed facades is studied, and future research developments are planned.

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Feedback control of sound transmission through a double glazed window

Cited by 60 publications

References 10 publications

Active control of pressure pulsation in a switched inertance hydraulic system

Active control of pressure pulsation in a switched inertance hydraulic system

An Active Technology for Improving the Sound Transmission Loss of Glazed Facades

Integration of an Automated Active Control System in Building Glazed Facades for Improving Sound Transmission Loss

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