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Dr. Stanislaw Wrona
Institute of Automatic Control, Silesian University of Technology, Akademicka 16, 44-100 Gliwice, Poland

Basic Info


Research Keywords & Expertise

0 Acoustics
0 Adaptive Control
0 Optimization
0 Mathematical Modelling
0 piezoelectric actuators

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Optimization
Active Noise Control
Adaptive Control
Active vibration control

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Journal article
Published: 14 August 2021 in Applied Sciences
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Testing the quality of manufactured products based on their sound expression is becoming popular nowadays. To maintain low production costs, the testing is processed at the end of the assembly line. Such measurements are affected considerably by the factory noise even though they are performed in anechoic chambers. Before designing the quality control algorithm based on a convolutional neural network, we do not know the influence of the factory noise on the success rate of the algorithm that can potentially be obtained. Therefore, this contribution addresses this problem. The experiments were undertaken on a synthetic dataset of heat, ventilation, and air-conditioning devices. The results show that classification accuracy of the decision-making algorithm declines more rapidly at a high level of environmental noise.

ACS Style

Jan Sikora; Renata Wagnerová; Lenka Landryová; Jan Šíma; Stanislaw Wrona. Influence of Environmental Noise on Quality Control of HVAC Devices Based on Convolutional Neural Network. Applied Sciences 2021, 11, 7484 .

AMA Style

Jan Sikora, Renata Wagnerová, Lenka Landryová, Jan Šíma, Stanislaw Wrona. Influence of Environmental Noise on Quality Control of HVAC Devices Based on Convolutional Neural Network. Applied Sciences. 2021; 11 (16):7484.

Chicago/Turabian Style

Jan Sikora; Renata Wagnerová; Lenka Landryová; Jan Šíma; Stanislaw Wrona. 2021. "Influence of Environmental Noise on Quality Control of HVAC Devices Based on Convolutional Neural Network." Applied Sciences 11, no. 16: 7484.

Journal article
Published: 26 May 2021 in Journal of Sound and Vibration
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Semi-active control approaches have been developed and employed for a variety of vibration-reduction applications, including adaptive vehicle suspensions, earthquake protection for civil structures, and more. These semi-active systems require significantly less energy than the corresponding active solutions, while continuing to provide a high level of performance, therefore they are an attractive approach. In the context of noise reduction barriers, semi-active control often refers to piezoelectric patches or stacks connected to shunt electric circuits in order to transform and dissipate mechanical energy. However, a different type of semi-active actuators can also be used to adapt the mechanical features of noise barriers in order to deal with varying noise properties. This paper proposes a novel semi-active actuator with tunable mass moment of inertia. When attached to a noise barrier, it can alter the resonant frequencies and mode shapes of the barrier in order to reduce acoustic radiation at dominant frequencies in the noise. As the presented results show, this actuator can enhance the transmission loss of a noise barrier for time-varying narrow-band noise by more than 10 dB in targeted frequency bands. Alternatively, the proposed actuator can be used to optimize acoustic radiation from a panel acting as a sound source. Both scenarios are considered and analyzed in this paper by employing mathematical modeling, experimental validation and numerical investigation.

ACS Style

Stanislaw Wrona; Marek Pawelczyk; Li Cheng. A novel semi-active actuator with tunable mass moment of inertia for noise control applications. Journal of Sound and Vibration 2021, 509, 116244 .

AMA Style

Stanislaw Wrona, Marek Pawelczyk, Li Cheng. A novel semi-active actuator with tunable mass moment of inertia for noise control applications. Journal of Sound and Vibration. 2021; 509 ():116244.

Chicago/Turabian Style

Stanislaw Wrona; Marek Pawelczyk; Li Cheng. 2021. "A novel semi-active actuator with tunable mass moment of inertia for noise control applications." Journal of Sound and Vibration 509, no. : 116244.

Journal article
Published: 04 April 2021 in Sensors
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Noise and vibration are common issues that may have a negative impact on human’s’ health. To minimize their consequences, several vibroacoustical methods may be employed. One well-known method is Piezoelectric Shunt Damping (PSD). Over the years, many approaches have been investigated, from passive, state switching circuits to active pulse-switching. In this paper, the authors propose three PSD implementations—passive Synchronized Switch Damping on Inductor (SSDI), semi-active SSDI and active Synchronized Switch Damping on Voltage source (SSDV)—for a single-panel structure mounted on a rigid-frame casing. The nine Macro Fiber Composite (MFC) elements were mounted on the plate based on preliminary simulations in FreeFEM. Then, the theoretical results were validated by an identification experiment. The main research is concentrated on the Sound Pressure Level (SPL) and structural vibrations reduction for selected frequencies. The active method provided the highest reduction of vibration—up to 5.5 dB for maximal possible loudspeaker level without overdrive and up to 7.5 dB for lower excitation levels.

ACS Style

Krzysztof Mazur; Jaroslaw Rzepecki; Anna Pietruszewska; Stanislaw Wrona; Marek Pawelczyk. Vibroacoustical Performance Analysis of a Rigid Device Casing with Piezoelectric Shunt Damping. Sensors 2021, 21, 2517 .

AMA Style

Krzysztof Mazur, Jaroslaw Rzepecki, Anna Pietruszewska, Stanislaw Wrona, Marek Pawelczyk. Vibroacoustical Performance Analysis of a Rigid Device Casing with Piezoelectric Shunt Damping. Sensors. 2021; 21 (7):2517.

Chicago/Turabian Style

Krzysztof Mazur; Jaroslaw Rzepecki; Anna Pietruszewska; Stanislaw Wrona; Marek Pawelczyk. 2021. "Vibroacoustical Performance Analysis of a Rigid Device Casing with Piezoelectric Shunt Damping." Sensors 21, no. 7: 2517.

Journal article
Published: 04 January 2021 in Mechanical Systems and Signal Processing
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Active control methods have shown their effectiveness in reducing noise transmitted through single- or double-panel barriers. However, when the availability of high-performance processors and energy sources is limited, it is worth considering alternative solutions, including semi-active methods. They can offer considerable levels of noise reduction with limited resources and lower application costs. This paper investigates a novel semi-active control approach for double-panel noise barriers, where bistable links mounted between the panels are structurally coupled, when turned on, or decoupled, when turned off. These semi-active links only require energy when switching between states. The structural couplings significantly alter natural frequencies and mode shapes of the vibroacoustic system. This enables an adaptation of structural response dependent on the noise spectrum, i.e. minimizing the radiation in the targeted frequency bands. Such an approach is especially feasible in case of non-stationarynarrow-band noise, which is very common in real-life. Analysis of experimental results shows that the acoustic radiation of the a noise barrier can be reduced by as much as 16 dB for targeted resonance frequencies.

ACS Style

Stanislaw Wrona; Marek Pawelczyk; Li Cheng. Semi-active links in double-panel noise barriers. Mechanical Systems and Signal Processing 2021, 154, 107542 .

AMA Style

Stanislaw Wrona, Marek Pawelczyk, Li Cheng. Semi-active links in double-panel noise barriers. Mechanical Systems and Signal Processing. 2021; 154 ():107542.

Chicago/Turabian Style

Stanislaw Wrona; Marek Pawelczyk; Li Cheng. 2021. "Semi-active links in double-panel noise barriers." Mechanical Systems and Signal Processing 154, no. : 107542.

Journal article
Published: 18 December 2020 in Composite Structures
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The focus of this paper is to investigate numerically the vibro-acoustic responses of functionally graded lightweight square panel (FGLSP) made from Al/Al2O3 with various boundary conditions (BCs). The approach of analysis is restricted to low and mid-frequency regions. First-order shear deformation theory and finite element method are employed to model the vibro-acoustic response of the FGLSP. Its properties vary along its thickness and are obtained by the Voigt’s rule of mixture as well as a simple power law distribution. Modal responses of pristine aluminium material (PAM) obtained analytically and experimentally are used to validate the numerical approximation of modal responses of PAM. These results are used to compare the numerical results of FGLSP and the first twelve mode shapes are obtained for all BCs. A comparison of the result shows that at low and mid-frequency regions, the sound transmission loss of FGLSP is higher than the conventional PAM. The study reveals that FGLSP can compete favourably with their pristine material counterparts. This material are particularly useful for noise reducing casings which surround noisy devices, household appliances or industrial machines, and limit noise transmission to the environment.

ACS Style

Chukwuemeke William Isaac; Stanislaw Wrona; Marek Pawelczyk; N.B. Roozen. Numerical investigation of the vibro-acoustic response of functionally graded lightweight square panel at low and mid-frequency regions. Composite Structures 2020, 259, 113460 .

AMA Style

Chukwuemeke William Isaac, Stanislaw Wrona, Marek Pawelczyk, N.B. Roozen. Numerical investigation of the vibro-acoustic response of functionally graded lightweight square panel at low and mid-frequency regions. Composite Structures. 2020; 259 ():113460.

Chicago/Turabian Style

Chukwuemeke William Isaac; Stanislaw Wrona; Marek Pawelczyk; N.B. Roozen. 2020. "Numerical investigation of the vibro-acoustic response of functionally graded lightweight square panel at low and mid-frequency regions." Composite Structures 259, no. : 113460.

Journal article
Published: 07 July 2020 in Mechanical Systems and Signal Processing
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Active Structural Acoustic Control (ASAC) is mostly performed using a passive noise barrier, vibration actuators, sensors and a control system. ASAC reduces or alters the vibration of the barrier structure in a way that blocks the noise propagation through it. However, it is crucial that the actuators are appropriately arranged to be able to effectively control the vibration of the barrier. If the actuators were not optimally arranged, then certain modes of the structure may be uncontrollable, or require a very high control effort. Hence, the locations of the actuators should be determined by a careful optimization process employing a model of the structure. A common approach is to maximize the controllability of the system over a defined frequency range of operation. However, such an optimisation procedure often results in a solution that considers numerous vibration modes, only some of which are acoustically-relevant. That is, certain structural modes may vibrate considerably, but their contribution to the noise transmission and radiation would be negligible. Therefore, in the presented research a new acoustic radiation-based approach to the optimisation of the arrangement of actuators is proposed. A model of acoustic radiation is introduced and new cost functions are formulated to focus on modes that strongly contribute to noise transmission or radiation by the noise barrier. For the considered system, this enables an increase in the controllability measure of more than 5 dB for acoustically-relevant modes, which is similar to the level of improvement achieved when the number of actuators is doubled.

ACS Style

Stanislaw Wrona; Marek Pawelczyk; Jordan Cheer. Acoustic radiation-based optimization of the placement of actuators for active control of noise transmitted through plates. Mechanical Systems and Signal Processing 2020, 147, 107009 .

AMA Style

Stanislaw Wrona, Marek Pawelczyk, Jordan Cheer. Acoustic radiation-based optimization of the placement of actuators for active control of noise transmitted through plates. Mechanical Systems and Signal Processing. 2020; 147 ():107009.

Chicago/Turabian Style

Stanislaw Wrona; Marek Pawelczyk; Jordan Cheer. 2020. "Acoustic radiation-based optimization of the placement of actuators for active control of noise transmitted through plates." Mechanical Systems and Signal Processing 147, no. : 107009.

Conference paper
Published: 24 June 2020 in Advances in Intelligent Systems and Computing
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The investigated method enables precise shaping of acoustic radiation of a vibrating plate, i.e. it allows one to relocate or create resonances and anti-resonances for selected frequencies, simultaneously altering their acoustic radiation efficiency in a desired manner. The method can be very beneficial for plates used as noise barriers, both in passive and active applications. The acoustic radiation shaping method involves mounting several additional ribs and masses to the plate surface at locations followed from an optimization process (sensors and actuators can also be included, if active control is considered). The optimization process requires a model of the vibroacoustic system, a cost function corresponding to the considered objective, and an optimization algorithm. In this paper, an introduction of A-weighting to the cost functions, which reflects a human perception of the noise radiated by or transmitted through the plate, is investigated. It follows from the analysis of obtained results that the introduction of A-weighting can provide even 8 dBA better passive noise attenuation.

ACS Style

Stanislaw Wrona; Krzysztof Mazur; Jaroslaw Rzepecki; Anna Chraponska; Marek Pawelczyk. A-Weighting for Acoustic Radiation Shaping of a Vibrating Plate. Advances in Intelligent Systems and Computing 2020, 171 -183.

AMA Style

Stanislaw Wrona, Krzysztof Mazur, Jaroslaw Rzepecki, Anna Chraponska, Marek Pawelczyk. A-Weighting for Acoustic Radiation Shaping of a Vibrating Plate. Advances in Intelligent Systems and Computing. 2020; ():171-183.

Chicago/Turabian Style

Stanislaw Wrona; Krzysztof Mazur; Jaroslaw Rzepecki; Anna Chraponska; Marek Pawelczyk. 2020. "A-Weighting for Acoustic Radiation Shaping of a Vibrating Plate." Advances in Intelligent Systems and Computing , no. : 171-183.

Journal article
Published: 06 March 2020 in Journal of Sound and Vibration
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A new method is proposed for precise shaping of the acoustic radiation of a vibrating plate. The potential applications of this method are: to optimize acoustic radiation of a plate employed as a sound source; and to enhance transmission loss of a plate used as a noise barrier, both in passive or active control solutions. The proposed method is based on mounting several additional ribs and masses (passive elements) to the plate surface at locations determined by an optimization process. This optimization involves a model of the vibroacoustic system, a cost function representing the objective under consideration, and an optimization algorithm. The method is described, and results of both numerical simulation and experimental validation are presented. Analysis of results shows that the transmission loss introduced by a passive noise barrier can be enhanced by more than 7 dB in frequency bands of interest. Furthermore, these enhancements can be combined with optimized arrangements of actuators and sensors, resulting in a hybrid passive-active noise control system.

ACS Style

Stanislaw Wrona; Marek Pawelczyk; Xiaojun Qiu. Shaping the acoustic radiation of a vibrating plate. Journal of Sound and Vibration 2020, 476, 115285 .

AMA Style

Stanislaw Wrona, Marek Pawelczyk, Xiaojun Qiu. Shaping the acoustic radiation of a vibrating plate. Journal of Sound and Vibration. 2020; 476 ():115285.

Chicago/Turabian Style

Stanislaw Wrona; Marek Pawelczyk; Xiaojun Qiu. 2020. "Shaping the acoustic radiation of a vibrating plate." Journal of Sound and Vibration 476, no. : 115285.

Review
Published: 24 February 2020 in Applied Sciences
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The increasing motivation behind the recently wide industrial applications of sandwich and composite double panel structures stems from their ability to absorb sounds more effectively. Meticulous selection of the geometrical and material constituents of both the core and panels of these structures can produce highly desirable properties. A good understanding of their vibro-acoustic response and emission index such as the sound transmission loss (STL) is, therefore, a requisite to producing optimal design. In this study, an overview of recent advances in STL of sandwich and composites double panels is presented. At first, some salient explanation of the various frequency and controlled regions are given. It then critically examines a number of parameter effects on the STL of sandwich and composite structures. Literatures on the numerical, analytical and experimental solutions of STL are systematically presented. Efficient and more reliable optimization problems that maximize the STL and minimize the objective functions capable of degrading the effectiveness of the structure to absorb sounds are also provided.

ACS Style

Chukwuemeke William Isaac; Marek Pawelczyk; Stanislaw Wrona. Comparative Study of Sound Transmission Losses of Sandwich Composite Double Panel Walls. Applied Sciences 2020, 10, 1543 .

AMA Style

Chukwuemeke William Isaac, Marek Pawelczyk, Stanislaw Wrona. Comparative Study of Sound Transmission Losses of Sandwich Composite Double Panel Walls. Applied Sciences. 2020; 10 (4):1543.

Chicago/Turabian Style

Chukwuemeke William Isaac; Marek Pawelczyk; Stanislaw Wrona. 2020. "Comparative Study of Sound Transmission Losses of Sandwich Composite Double Panel Walls." Applied Sciences 10, no. 4: 1543.

Journal article
Published: 03 January 2020 in Applied Sciences
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Reduction of noise generated by devices is an important problem, both in industrial environments where high sound pressure levels may damage hearing, and in households where the sound pressure level is usually moderate, but may cause discomfort and stress. Classically used passive methods often have poor performance for low frequencies. Alternatively, active control can be used to improve noise reduction in this frequency range. In the proposed approach, noise generated by devices may be reduced by controlling vibrations of the casing. The authors previously confirmed the performance of the proposed active control approach using a dedicated noise-canceling casing. Herein, we describe further development and application of the method to an off-the-shelf washing machine. Electrodynamic actuators were installed on four walls of the washing machine. The performance of the control systems was experimentally evaluated during the real spinning phase and the results are reported here.

ACS Style

Krzysztof Mazur; Stanislaw Wrona; Marek Pawelczyk. Performance Evaluation of Active Noise Control for a Real Device Casing. Applied Sciences 2020, 10, 377 .

AMA Style

Krzysztof Mazur, Stanislaw Wrona, Marek Pawelczyk. Performance Evaluation of Active Noise Control for a Real Device Casing. Applied Sciences. 2020; 10 (1):377.

Chicago/Turabian Style

Krzysztof Mazur; Stanislaw Wrona; Marek Pawelczyk. 2020. "Performance Evaluation of Active Noise Control for a Real Device Casing." Applied Sciences 10, no. 1: 377.

Conference paper
Published: 01 May 2019 in 2019 20th International Carpathian Control Conference (ICCC)
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Semi-active control methods are well known in context of structural vibration reduction. Despite of lower efficiency in comparison to the active methods, they are still the alternatives providing several advantages. The main benefit is that no additional energy is added to the system, which guarantees stability of the whole system. In addition, semi-active methods are more efficient than passive ones, especially for the systems controlled by e.g. switching or adaptive algorithms and with non-stationary excitation or unknown excitation during the design stage. The experiments have been performed using five Macro Fiber Composite piezoelectric elements attached to a thin, steel plate, which is a front wall of a cubical, rigid casing. The placement of the elements has been optimized based on the measured mode shapes of the structure. The vibration of other walls are reduced using the passive methods. This paper is focused on experimental evaluation of structural vibration reduction, depending on excitation and configuration of piezoelectric elements. Several types of electrical circuits are considered.

ACS Style

Jaroslaw Rzepecki; Anna Chraponska; Krzysztof Mazur; Stanislaw Wrona; Marek Pawelczyk. Semi-active reduction of device casing vibration using a set of piezoelectric elements. 2019 20th International Carpathian Control Conference (ICCC) 2019, 1 -5.

AMA Style

Jaroslaw Rzepecki, Anna Chraponska, Krzysztof Mazur, Stanislaw Wrona, Marek Pawelczyk. Semi-active reduction of device casing vibration using a set of piezoelectric elements. 2019 20th International Carpathian Control Conference (ICCC). 2019; ():1-5.

Chicago/Turabian Style

Jaroslaw Rzepecki; Anna Chraponska; Krzysztof Mazur; Stanislaw Wrona; Marek Pawelczyk. 2019. "Semi-active reduction of device casing vibration using a set of piezoelectric elements." 2019 20th International Carpathian Control Conference (ICCC) , no. : 1-5.

Journal article
Published: 13 March 2019 in Applied Sciences
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Electric appliances used in workplaces and everyday life often generate a low-frequency noise, which affects human body systems. Passive methods employed to reduce noise are not effective at low frequencies. The classical approach to active noise control practically involves the generation of local zones of quiet, whereas at other areas the noise is reinforced. Moreover, it usually requires a large number of secondary sound sources. Hence, an active casing approach has been developed. The active casing panels’ vibrations are controlled to reduce the device noise emission. Efficiency of this method has been previously confirmed by the authors and the results have been reported in multiple journal publications. However, in the previous research experiments, the active casing was placed at a distance from the enclosure walls. In this research, the active casing is located in a corner and such placement is intentionally used to facilitate the active control system’s operation. The noise reduction performance is investigated at multiple configurations, including a range of distances from the corner and different error microphone arrangements. The analysis of both primary and secondary paths is given. Advantages and drawbacks of different active casing configurations are presented and discussed.

ACS Style

Anna Chraponska; Stanislaw Wrona; Jaroslaw Rzepecki; Krzysztof Mazur; Marek Pawelczyk. Active Structural Acoustic Control of an Active Casing Placed in a Corner. Applied Sciences 2019, 9, 1059 .

AMA Style

Anna Chraponska, Stanislaw Wrona, Jaroslaw Rzepecki, Krzysztof Mazur, Marek Pawelczyk. Active Structural Acoustic Control of an Active Casing Placed in a Corner. Applied Sciences. 2019; 9 (6):1059.

Chicago/Turabian Style

Anna Chraponska; Stanislaw Wrona; Jaroslaw Rzepecki; Krzysztof Mazur; Marek Pawelczyk. 2019. "Active Structural Acoustic Control of an Active Casing Placed in a Corner." Applied Sciences 9, no. 6: 1059.

Journal article
Published: 16 November 2018 in Applied Acoustics
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An actively controlled thin barrier may provide better noise reduction results than common passive solutions. The performance of such active method has been confirmed by the authors using a dedicated noise-cancelling laboratory casing. Now, such approach is developed and applied to a real device casing, what is a significant step toward commercialisation of the active casing method. An adaptive FXLMS algorithm with practical modifications is proposed for the active control of the casing to provide noise reduction. A feed-forward structure is used, with a reference microphone located inside the real device. Additionally, an Internal Model Control system with reference signal estimation is also implemented for a comparison. The performance of the resulting control systems is experimentally verified for a real washing machine (an off-the-shelf product), using a loudspeaker placed inside the washing machine to provide reproducible noise. Obtained results are reported and discussed.

ACS Style

Krzysztof Mazur; Stanislaw Wrona; Marek Pawelczyk. Active noise control for a washing machine. Applied Acoustics 2018, 146, 89 -95.

AMA Style

Krzysztof Mazur, Stanislaw Wrona, Marek Pawelczyk. Active noise control for a washing machine. Applied Acoustics. 2018; 146 ():89-95.

Chicago/Turabian Style

Krzysztof Mazur; Stanislaw Wrona; Marek Pawelczyk. 2018. "Active noise control for a washing machine." Applied Acoustics 146, no. : 89-95.

Research article
Published: 12 November 2018 in Journal of Low Frequency Noise, Vibration and Active Control
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The active casing approach is a technique to reduce noise emission of devices and machinery by controlling vibrations of their casings. This method was successfully validated by the authors for a single-panel casing in previous publications. However, if even higher noise reduction is required, a dedicated double-panel structure can be employed. In this paper, the sound insulation efficiency of a double-panel active casing is evaluated and compared with a single-panel structure by performing a series of laboratory experiments. The least mean squares algorithm is used to adaptively update control filter parameters. A low-frequency noise in the range up to 500 Hz is considered. Advantages and limits of the proposed approach are pointed out and discussed, and conclusions for future research are given.

ACS Style

Stanislaw Wrona; Marek Pawelczyk. Feedforward control of double-panel casing for active reduction of device noise. Journal of Low Frequency Noise, Vibration and Active Control 2018, 38, 787 -797.

AMA Style

Stanislaw Wrona, Marek Pawelczyk. Feedforward control of double-panel casing for active reduction of device noise. Journal of Low Frequency Noise, Vibration and Active Control. 2018; 38 (2):787-797.

Chicago/Turabian Style

Stanislaw Wrona; Marek Pawelczyk. 2018. "Feedforward control of double-panel casing for active reduction of device noise." Journal of Low Frequency Noise, Vibration and Active Control 38, no. 2: 787-797.

Conference paper
Published: 01 September 2018 in 2018 Joint Conference - Acoustics
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The active casing approach is to reduce device noise by controlling the vibration of its casing. Its efficiency was confirmed by the authors in laboratory experiments, and it was reported in previous publications. However, the casing was distant from walls of the enclosure. Now, a new configuration is considered, when the casing is placed at a wall, and the actuators mounted on the casing from the side of the wall are also employed to actively reduce the emitted noise. In such a configuration the acoustic reflection from the wall is intentionally used. The considered wall is smooth and rigid, thus it is highly acoustically reflective. In this paper, a preliminary experimental investigation of such concept is presented. The primary and secondary paths analysis is given. Advantages and limits of the proposed approach are pointed out and discussed.

ACS Style

Anna Chraponska; Stanislaw Wrona; Jaroslaw Rzepecki; Krzysztof Mazur; Marek Pawelczyk. Secondary Paths Analysis of an Active Casing Placed at a Wall. 2018 Joint Conference - Acoustics 2018, 1 -5.

AMA Style

Anna Chraponska, Stanislaw Wrona, Jaroslaw Rzepecki, Krzysztof Mazur, Marek Pawelczyk. Secondary Paths Analysis of an Active Casing Placed at a Wall. 2018 Joint Conference - Acoustics. 2018; ():1-5.

Chicago/Turabian Style

Anna Chraponska; Stanislaw Wrona; Jaroslaw Rzepecki; Krzysztof Mazur; Marek Pawelczyk. 2018. "Secondary Paths Analysis of an Active Casing Placed at a Wall." 2018 Joint Conference - Acoustics , no. : 1-5.

Journal article
Published: 22 August 2018 in Control Engineering Practice
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Performance of an Active Noise Control (ANC) system strongly depends on sensors and actuators spatial arrangement. It determines both achieved Noise Reduction (NR) levels and spatial distribution of obtained zones of quiet, making it an essential problem. However, if the acoustic field in the enclosure can be appropriately modelled, then optimization algorithms can be employed to find efficient configuration of the ANC system, enhancing its performance according to a formulated cost function and constraints. This paper proposes a complete method for enhancing NR levels and shaping zones of quiet generated with an ANC system by optimization of sensors and actuators arrangement. A Memetic Algorithm (MA) is utilized. The MA itself and its proposed operators are described. The optimization problem formulation is derived and discussed. As a control algorithm, Distributed Multiple Error Filtered-x Least Mean Square (DMEFxLMS) is used. Extensive simulation results are presented for an exemplary real enclosure. The model of the acoustic environment has been obtained by real-world experiments, resulting in identification of 36864 acoustic responses in total. Practically feasible cost function and constraints are evaluated. Advantages and limits of the method are pointed out and discussed.

ACS Style

Stanislaw Wrona; Maria de Diego; Marek Pawelczyk. Shaping zones of quiet in a large enclosure generated by an active noise control system. Control Engineering Practice 2018, 80, 1 -16.

AMA Style

Stanislaw Wrona, Maria de Diego, Marek Pawelczyk. Shaping zones of quiet in a large enclosure generated by an active noise control system. Control Engineering Practice. 2018; 80 ():1-16.

Chicago/Turabian Style

Stanislaw Wrona; Maria de Diego; Marek Pawelczyk. 2018. "Shaping zones of quiet in a large enclosure generated by an active noise control system." Control Engineering Practice 80, no. : 1-16.

Conference paper
Published: 01 August 2018 in 2018 23rd International Conference on Methods & Models in Automation & Robotics (MMAR)
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In this paper the fundamental acoustic camera issues have been presented. First, design and construction of the 2D microphone array with a vision camera have been described. Finally, acoustic camera has been improved by the fusion of the sound map and digital image from the vision camera. The authors describe in details some fundamental issues related to the acoustic camera construction. Experiments have been performed with NI cDAQ acquisition system equipped with 4×4 microphone array including 2D vision camera. The experiments have been concentrated on the evaluation of different image fusion algorithms performance. In result, for the specific purposes, especially for noisy spaces, some alternative method of the image fusion might be more efficient than standard algorithm.

ACS Style

Jaroslaw Rzepecki; Sebastian Budzan; Stanislaw Wrona; Marek Pawelczyk. Performance Analysis of the Image Fusion Methods of the Proposed 2D Acoustic Camera. 2018 23rd International Conference on Methods & Models in Automation & Robotics (MMAR) 2018, 397 -400.

AMA Style

Jaroslaw Rzepecki, Sebastian Budzan, Stanislaw Wrona, Marek Pawelczyk. Performance Analysis of the Image Fusion Methods of the Proposed 2D Acoustic Camera. 2018 23rd International Conference on Methods & Models in Automation & Robotics (MMAR). 2018; ():397-400.

Chicago/Turabian Style

Jaroslaw Rzepecki; Sebastian Budzan; Stanislaw Wrona; Marek Pawelczyk. 2018. "Performance Analysis of the Image Fusion Methods of the Proposed 2D Acoustic Camera." 2018 23rd International Conference on Methods & Models in Automation & Robotics (MMAR) , no. : 397-400.

Journal article
Published: 01 January 2018 in Mechanical Systems and Signal Processing
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ACS Style

Krzysztof Mazur; Stanislaw Wrona; Marek Pawelczyk. Design and implementation of multichannel global active structural acoustic control for a device casing. Mechanical Systems and Signal Processing 2018, 98, 877 -889.

AMA Style

Krzysztof Mazur, Stanislaw Wrona, Marek Pawelczyk. Design and implementation of multichannel global active structural acoustic control for a device casing. Mechanical Systems and Signal Processing. 2018; 98 ():877-889.

Chicago/Turabian Style

Krzysztof Mazur; Stanislaw Wrona; Marek Pawelczyk. 2018. "Design and implementation of multichannel global active structural acoustic control for a device casing." Mechanical Systems and Signal Processing 98, no. : 877-889.

Conference paper
Published: 07 June 2017 in Advances in Intelligent Systems and Computing
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It is possible to improve sound insulation of devices and machinery from the environment by appropriately controlling vibrations of their casings. When implementing this approach, there is a need to select efficient locations of actuators on each of the casing walls. A common solution is to employ an optimization algorithm to find favourable arrangement according to a given objective. One of the essential parameters of this process is a number of actuators to be optimized, but most often it is assumed a priori, without any proper considerations. The aim of this paper is to give an insight into the problem of defining the number of actuators for active noise reduction implementations. The optimal value depends on the particular application, its mechanical limitations, costs, considered frequency band to be controlled, etc.However, a general approach for analysis and decision making can be formulated. As an exemplary structure, a light-weight device casing is considered. The relationships between the number of actuators, the considered frequency band, and obtained values of the optimization index are given.

ACS Style

Stanisław Wrona; Krzysztof Mazur; Marek Pawelczyk. Defining the Optimal Number of Actuators for Active Device Noise Reduction Applications. Advances in Intelligent Systems and Computing 2017, 577, 291 -300.

AMA Style

Stanisław Wrona, Krzysztof Mazur, Marek Pawelczyk. Defining the Optimal Number of Actuators for Active Device Noise Reduction Applications. Advances in Intelligent Systems and Computing. 2017; 577 ():291-300.

Chicago/Turabian Style

Stanisław Wrona; Krzysztof Mazur; Marek Pawelczyk. 2017. "Defining the Optimal Number of Actuators for Active Device Noise Reduction Applications." Advances in Intelligent Systems and Computing 577, no. : 291-300.

Journal article
Published: 01 January 2017 in Measurement
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ACS Style

Józef Wiora; Stanislaw Wrona; Marek Pawelczyk. Evaluation of measurement value and uncertainty of sound pressure level difference obtained by active device noise reduction. Measurement 2017, 96, 67 -75.

AMA Style

Józef Wiora, Stanislaw Wrona, Marek Pawelczyk. Evaluation of measurement value and uncertainty of sound pressure level difference obtained by active device noise reduction. Measurement. 2017; 96 ():67-75.

Chicago/Turabian Style

Józef Wiora; Stanislaw Wrona; Marek Pawelczyk. 2017. "Evaluation of measurement value and uncertainty of sound pressure level difference obtained by active device noise reduction." Measurement 96, no. : 67-75.