Author: Cole V. Duke
Publisher:
ISBN:
Category : Electronic dissertations
Languages : en
Pages : 74
Book Description
Active noise control (ANC) has been implemented using analog filters to reduce broadband noise from a small axial cooling fan. Previous work successfully attenuated narrow-band, tonal portions of the noise using a digital controller. The practical performance limits of this system were reached and it was desirable to attenuate the noise further. Additional research, therefore, sought to attenuate broadband noise from the fan using digital controller, but performance was limited by the group delay inherent in the digital signal processor (DSP). Current research attempts to further attenuate broadband noise and improve performance of the system by combining the tonal controller with an analog feedback controller. An analog controller is implemented in parallel with the digital controller without degrading the performance of either individual controller. Broadband noise is attenuated in a certain frequency region, but at the expense of increasing noise in adjacent frequency regions. Results show that a single-input single-output (SISO) controller is preferable to a multiple-input multiple-output (MIMO) controller for this system.
Analog Feedback Control of Broadband Fan Noise
Author: Cole V. Duke
Publisher:
ISBN:
Category : Electronic dissertations
Languages : en
Pages : 74
Book Description
Active noise control (ANC) has been implemented using analog filters to reduce broadband noise from a small axial cooling fan. Previous work successfully attenuated narrow-band, tonal portions of the noise using a digital controller. The practical performance limits of this system were reached and it was desirable to attenuate the noise further. Additional research, therefore, sought to attenuate broadband noise from the fan using digital controller, but performance was limited by the group delay inherent in the digital signal processor (DSP). Current research attempts to further attenuate broadband noise and improve performance of the system by combining the tonal controller with an analog feedback controller. An analog controller is implemented in parallel with the digital controller without degrading the performance of either individual controller. Broadband noise is attenuated in a certain frequency region, but at the expense of increasing noise in adjacent frequency regions. Results show that a single-input single-output (SISO) controller is preferable to a multiple-input multiple-output (MIMO) controller for this system.
Publisher:
ISBN:
Category : Electronic dissertations
Languages : en
Pages : 74
Book Description
Active noise control (ANC) has been implemented using analog filters to reduce broadband noise from a small axial cooling fan. Previous work successfully attenuated narrow-band, tonal portions of the noise using a digital controller. The practical performance limits of this system were reached and it was desirable to attenuate the noise further. Additional research, therefore, sought to attenuate broadband noise from the fan using digital controller, but performance was limited by the group delay inherent in the digital signal processor (DSP). Current research attempts to further attenuate broadband noise and improve performance of the system by combining the tonal controller with an analog feedback controller. An analog controller is implemented in parallel with the digital controller without degrading the performance of either individual controller. Broadband noise is attenuated in a certain frequency region, but at the expense of increasing noise in adjacent frequency regions. Results show that a single-input single-output (SISO) controller is preferable to a multiple-input multiple-output (MIMO) controller for this system.
Active Control of Fan-generated Plane Wave Noise
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 32
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 32
Book Description
Analog Feedback Control of an Active Sound Transmission Control Module
Author: Jason Derek Sagers
Publisher:
ISBN:
Category : Electronic dissertations
Languages : en
Pages : 226
Book Description
An experimental proof-of-concept module was constructed using two 10 cm diameter loudspeaker drivers, two accelerometers, and other off-the-shelf materials. The two analog feedback controllers used in the module were designed and built using measured frequency response function techniques. The passive and active transmission loss of the module was measured using a plane-wave tube. Transmission loss of broadband random-noise in excess of 50 dB was achieved between 100 Hz and 2 kHz. The experimental transmission loss results validated the numerical model and showcased the transmission loss performance of the new module design.
Publisher:
ISBN:
Category : Electronic dissertations
Languages : en
Pages : 226
Book Description
An experimental proof-of-concept module was constructed using two 10 cm diameter loudspeaker drivers, two accelerometers, and other off-the-shelf materials. The two analog feedback controllers used in the module were designed and built using measured frequency response function techniques. The passive and active transmission loss of the module was measured using a plane-wave tube. Transmission loss of broadband random-noise in excess of 50 dB was achieved between 100 Hz and 2 kHz. The experimental transmission loss results validated the numerical model and showcased the transmission loss performance of the new module design.
Broadband Noise Control Using Predictive Techniques
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 26
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 26
Book Description
Method for Obtaining Noise Patterns Entering a Feedback Control System Using Analog Techniques
Author: Andrew Alfonso Frank
Publisher:
ISBN:
Category : Servomechanisms
Languages : en
Pages : 100
Book Description
Publisher:
ISBN:
Category : Servomechanisms
Languages : en
Pages : 100
Book Description
Scientific and Technical Aerospace Reports
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 994
Book Description
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 994
Book Description
LEOS 1992 Summer Topical Meeting Digest on Broadband Analog and Digital Optoelectronics ... Optical Multiple Access Networks ... Integrated Optoelectronics ... Smart Pixels
Author:
Publisher: Institute of Electrical & Electronics Engineers(IEEE)
ISBN:
Category : Computer networks
Languages : en
Pages : 342
Book Description
Publisher: Institute of Electrical & Electronics Engineers(IEEE)
ISBN:
Category : Computer networks
Languages : en
Pages : 342
Book Description
The Journal of the Acoustical Society of America
Author: Acoustical Society of America
Publisher:
ISBN:
Category : Acoustical engineering
Languages : en
Pages : 988
Book Description
Publisher:
ISBN:
Category : Acoustical engineering
Languages : en
Pages : 988
Book Description
Proceedings of NOISE-CON ...
Author:
Publisher:
ISBN:
Category : Noise
Languages : en
Pages : 404
Book Description
Publisher:
ISBN:
Category : Noise
Languages : en
Pages : 404
Book Description
The Shock and Vibration Digest
Author:
Publisher:
ISBN:
Category : Shock (Mechanics)
Languages : en
Pages : 576
Book Description
Publisher:
ISBN:
Category : Shock (Mechanics)
Languages : en
Pages : 576
Book Description