Virtual Sensing of Acoustic Potential Energy Through a Kalman Filter for Active Control of Interior Sound

2014 ◽  
pp. 221-241 ◽  
Author(s):  
A. Kumar ◽  
S. V. Modak
Keyword(s):  
Kalman Filter ◽  
Potential Energy ◽  
Active Control ◽  
Virtual Sensing

scholarly journals Generation of Vertical Fine Structure by the Internal Waves with the Regard for Turbulent Viscosity and Diffusion

2021 ◽  
Vol 28 (1) ◽  
Author(s):  
S. G. Demyshev ◽  
N. A. Evstigneeva ◽  
D. V. Alekseev ◽  
O. A. Dymova ◽  
N. A. Miklashevskaya ◽  
...  
Keyword(s):  
Kalman Filter ◽  
Data Assimilation ◽  
Potential Energy ◽  
Black Sea ◽  
Anticyclonic Eddy ◽  
Shear Instability ◽  
Optimal Interpolation ◽  
Open Boundary ◽  
The Black Sea ◽  
Coastal Circulation

Purpose. The study is aimed at evaluating effectiveness of the procedure of the observational data assimilation using the Kalman filter algorithm as compared to sequential analysis of the hydrophysical fields based on the optimal interpolation method, and at analyzing the mesoscale features of coastal circulation near the western Crimea coast and in the Sevastopol region. Methods and Results. Based on the hydrodynamic model adapted to the Black Sea coastal zone conditions including the open boundary and on the temperature and salinity data from the hydrological survey in 2007, the dynamic and energy characteristics of the Black Sea coastal circulation were calculated with high spatial resolution (horizontal grid is ~ 1.6 × 1.6 km and 30 vertical horizons). The hydrophysical fields were reconstructed using two algorithms of data assimilation: the sequential optimal interpolation and the modified Kalman filter. The kinetic energy changed mainly due to the wind action, vertical friction and the work of pressure forces; the potential energy – due to the potential energy advection and the horizontal turbulent diffusion. The following circulation features were reconstructed: the anticyclonic eddy with the radius about 15 km in the Kalamita Bay in the water upper layer, the anticyclonic eddy with the radius about 15 km between 32.2 and 32.6° E in the whole water layer, the intense current near Sevastopol and along the Crimea western coast directed to the north and northwest, and the submesoscale eddies of different signs of rotation in the upper layer. Conclusions. It is shown that having been taken into account, heterogeneity and non-isotropy of the error estimates of the temperature and salinity fields relative to the correlation function lead to qualitative and quantitative differences in the hydrodynamic fields (amplification of currents, change of the currents’ direction and eddy formations were better pronounced). At the same time, the mean square errors of the thermohaline fields’ estimates decreased. Formation of the anticyclonic eddy with the radius about 15 km in the Kalamita Bay could be related to the current shear instability. Submesoscale eddies with the diameters less than 5 km were formed when the current flowed around the coastline and the bottom topography inhomogeneities.

scholarly journals A Kalman filter approach to virtual sensing for active noise control

2008 ◽  
Vol 22 (2) ◽  
pp. 490-508 ◽  
Author(s):  
Cornelis D. Petersen ◽  
Rufus Fraanje ◽  
Ben S. Cazzolato ◽  
Anthony C. Zander ◽  
Colin H. Hansen
Keyword(s):  
Kalman Filter ◽  
Noise Control ◽  
Active Noise Control ◽  
Active Noise ◽  
Virtual Sensing ◽  
Filter Approach

scholarly journals Feedforward multichannel virtual-sensing active control of noise through an aperture: Analysis on causality and sensor-actuator constraints

2020 ◽  
Vol 147 (1) ◽  
pp. 32-48 ◽  
Author(s):  
Dongyuan Shi ◽  
Woon-Seng Gan ◽  
Bhan Lam ◽  
Rina Hasegawa ◽  
Yoshinobu Kajikawa
Keyword(s):  
Active Control ◽  
Sensor Actuator ◽  
Virtual Sensing ◽  
Actuator Constraints

Errata to “A Kalman filter approach to virtual sensing for active noise control” [Mech. Syst. Sig. Process. 22(2) (2007) 490–508]

2019 ◽  
Vol 127 ◽  
pp. 610
Author(s):  
Cornelis D. Petersen ◽  
Rufus Fraanje ◽  
Ben S. Cazzolato ◽  
Anthony C. Zander ◽  
Colin H. Hansen
Keyword(s):  
Kalman Filter ◽  
Noise Control ◽  
Active Noise Control ◽  
Active Noise ◽  
Virtual Sensing ◽  
Filter Approach

scholarly journals Analysis of the Dynamic and Energy Characteristics of Water Circulation near the Western Crimea Coast and in the Sevastopol Region Based on the Observational Data Assimilation in the Numerical Model of the Black Sea Dynamics

2021 ◽  
Vol 37 (1) ◽  
Author(s):  
S. G. Demyshev ◽  
N. A. Evstigneeva ◽  
D. V. Alekseev ◽  
O. A. Dymova ◽  
N. A. Miklashevskaya ◽  
...  
Keyword(s):  
Kalman Filter ◽  
Data Assimilation ◽  
Potential Energy ◽  
Observational Data ◽  
Black Sea ◽  
Anticyclonic Eddy ◽  
Optimal Interpolation ◽  
The Black Sea ◽  
Coastal Circulation ◽  
Energy Characteristics

Purpose. The study is aimed at evaluating effectiveness of the procedure of the observational data assimilation using the Kalman filter algorithm as compared to sequential analysis of the hydrophysical fields based on the optimal interpolation method, and at analyzing the mesoscale features of coastal circulation near the western Crimea coast and in the Sevastopol region. Methods and Results. Based on the hydrodynamic model adapted to the Black Sea coastal zone conditions including the open boundary and on the temperature and salinity data from the hydrological survey in 2007, the dynamic and energy characteristics of the Black Sea coastal circulation were calculated with high spatial resolution (horizontal grid is ~1.6×1.6 km and 30 vertical horizons). The hydrophysical fields were reconstructed using two algorithms of data assimilation: the sequential optimal interpolation and the modified Kalman filter. The kinetic energy changed mainly due to the wind action, vertical friction and the work of pressure forces; the potential energy – due to the potential energy advection and the horizontal turbulent diffusion. The following circulation features were reconstructed: the anticyclonic eddy with the radius about 15 km in the Kalamitsky Bay in the water upper layer, the anticyclonic eddy with the radius about 15 km between 32.2 and 32.6° E in the whole water layer, the intense current near Sevastopol and along the Crimea western coast directed to the north and northwest, and the submesoscale eddies of different signs of rotation in the upper layer. Conclusions. It is shown that having been taken into account, heterogeneity and non-isotropy of the error estimates of the temperature and salinity fields relative to the correlation function lead to qualitative and quantitative differences in the hydrodynamic fields (amplification of currents, change of the currents’ direction and eddy formations were better pronounced). At the same time, the mean square errors of the thermohaline fields’ estimates decreased. Formation of the anticyclonic eddy with the radius about 15 km in the Kalamitsky Bay could be related to the current shear instability. Submesoscale eddies with the diameters less than 5 km were formed when the current flowed around the coastline and the bottom topography inhomogeneities

Active Control of Sound Radiation Into an Enclosure Using Different Number of Actuators

2013 ◽  
Vol 313-314 ◽  
pp. 1299-1303
Author(s):  
Huai Feng Cui ◽  
Nan Chen
Keyword(s):  
Potential Energy ◽  
Active Control ◽  
Noise Level ◽  
Sound Radiation ◽  
Coupled System ◽  
Point Force ◽  
Contour Plot ◽  
Control Mechanisms ◽  
Simply Supported ◽  
Flexible Plates

This paper presents an investigation into the active control of structural-acoustic coupled system of a rectangular enclosure involving two simply supported flexible plates. One of the two plates is driven by a point force. The locations of actuators are determined by considering contour plot of the optimal potential energy. The control mechanisms for this enclosure are analyzed when one, two and three actuators are applied on one of the plates. Results obtained demonstrate that the control mechanisms for Panelaare always modal restructuring; those for Panelbare dominantly modal suppression when a different number of actuators is applied to reduce the noise level.

Virtual Sensing in Local Active Suppression on Pressure Fluctuations for Controlling Flow-Induced Vibration in Hard Disk Drives

2012 ◽  
Author(s):  
Hequn Min ◽  
Xiaoyang Huang ◽  
Qide Zhang
Keyword(s):  
Active Control ◽  
Control Strategy ◽  
Pressure Fluctuations ◽  
Hard Disk Drives ◽  
Hard Disk ◽  
Feedback Signal ◽  
Spatial Average ◽  
Disk Drives ◽  
Virtual Sensing ◽  
Active Control Strategy

Numerical simulations are presented on a feedback active control strategy for flow-induced off-track vibration of the head gimbals assembly (HGA) supporting the slider in hard disk drives, through suppressing pressure fluctuations around the HGA. A virtual sensing method is employed to enable the feedback signal changeable from pressure fluctuations at the physical sensor position to those at single “virtual sensor” positions closely around the HGA or a spatial average of pressure fluctuations along an HGA surface. Based on a linear control methodology, performance of the proposed active control strategy with different feedback signals has been investigated in two-dimensional simulations, where a physical pressure sensor and a pressure actuator are assumed on the inner-surface of the HDD cover to detect the pressure fluctuations and to actuate active pressure oscillations into HDD space respectively. The results show effective control on the HGA off-track vibration when the feedback signal is configured to minimize pressure fluctuations at specific positions closely around the HGA, such as the wake region. It is also shown that satisfying control effect can be achieved on the HGA off-track vibration in the global spectrum when the feedback signal is configured to minimize the spatial average of pressure fluctuations along the upper surface of the HGA.

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