Dr. Amrita Kumar Profile

Dr. Amrita Kumar

Executive Vice President

SPIE Involvement:

Author

Area of Expertise:

Structural Health Monitoring

Proceedings Article | 9 April 2010 Paper

Autonomous self-powered structural health monitoring system

Xinlin Qing, Steven Anton, David Zhang, Amrita Kumar, Daniel Inman, Teng Ooi

Proceedings Volume 7650, 765011 (2010) https://doi.org/10.1117/12.847171

KEYWORDS: Structural health monitoring, Solar cells, Sensors, Energy harvesting, Phase modulation, Diagnostics, Composites, Computing systems, Sensor networks, Amplifiers

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Proceedings Article | 8 April 2008 Paper

SMART solutions for composite structures

David Zhang, Paul Liu, Shawn Beard, Peter Qing, Amrita Kumar, Lien Ouyang

Proceedings Volume 6934, 69341C (2008) https://doi.org/10.1117/12.778468

KEYWORDS: Sensors, Composites, Structural health monitoring, Damage detection, Sensor networks, Metals, Temperature metrology, Diagnostics, Detection and tracking algorithms, Switches

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Proceedings Article | 27 April 2007 Paper

A new SMART sensing system for aerospace structures

David Zhang, Pin Yu, Shawn Beard, Peter Qing, Amrita Kumar, Fu-Kuo Chang

Proceedings Volume 6561, 656107 (2007) https://doi.org/10.1117/12.720124

KEYWORDS: Sensors, Composites, Sensing systems, Diagnostics, Structural health monitoring, Inspection, Data acquisition, Unmanned vehicles, Unmanned aerial vehicles, Sensor networks

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Proceedings Article | 19 April 2007 Paper

Responsive satellites and the need for structural health monitoring

Brandon Arritt, Amrita Kumar, Steven Buckley, Robert Hannum, Jeffry Welsh, Shawn Beard, Xinlin Qin, Peter Wegner

Proceedings Volume 6531, 653109 (2007) https://doi.org/10.1117/12.714424

KEYWORDS: Satellites, Structural health monitoring, Sensors, Space operations, Connectors, Satellite communications, Diagnostics, Signal processing, Analytical research, 3D displays

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Proceedings Article | 10 May 2006 Paper

Impact detection and analysis/health monitoring system for composites

James Child, Amrita Kumar, Shawn Beard, Peter Qing, Don Paslay

Proceedings Volume 6222, 62220G (2006) https://doi.org/10.1117/12.669525

KEYWORDS: Composites, Sensors, Rockets, Calibration, Manufacturing

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Proceedings Article | 30 March 2006 Paper

In situ monitoring of the integrity of bonded repair patches on aircraft and civil infrastructures

Amrita Kumar, Dennis Roach, Shawn Beard, Xinlin Qing, Robert Hannum

Proceedings Volume 6179, 61790M (2006) https://doi.org/10.1117/12.657681

KEYWORDS: Sensors, Ferroelectric materials, Structural health monitoring, Inspection, Diagnostics, Data centers, Composites, Signal processing, Adhesives, Metals

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Monitoring the continued health of aircraft subsystems and identifying problems before they affect airworthiness has been a long-term goal of the aviation industry. Because in-service conditions and failure modes experienced by structures are generally complex and unknown, conservative calendar-based or usage-based scheduled maintenance practices are overly time-consuming, labor-intensive and expensive. Metal structures such as helicopters and other transportation systems are likely to develop fatigue cracks under cyclic loads and corrosive service environments. Early detection of cracks is a key element to prevent catastrophic failure and prolong structural life. Furthermore, as structures age, maintenance service frequency and costs increase while performance and availability decrease. Current non-destructive inspection (NDI) techniques that can potentially be used for this purpose typically involve complex, time-intensive procedures, which are labor-intensive and expensive. Most techniques require access to the damaged area on at least one side, and sometimes on both sides. This can be very difficult for monitoring of certain inaccessible regions. In those cases, inspection may require removal of access panels or even structural disassembly. Once access has been obtained, automated inspection techniques likely will not be practical due to the bulk of the required equipment. Results obtained from these techniques may also be sensitive to the sweep speed, tool orientation, and downward pressure. This can be especially problematic for hand-held inspection tools where none of these parameters is mechanically controlled. As a result, data can vary drastically from one inspection to the next, from one technician to the next, and even from one sweep to the next. Structural health monitoring (SHM) offers the promise of a paradigm shift from schedule-driven maintenance to condition-based maintenance (CBM) of assets. Sensors embedded permanently in aircraft safety critical structures that can monitor damage can provide for improved reliability and streamlining of aircraft maintenance. Early detection of damage such as fatigue crack initiation can improve personnel safety and prolong service life. This paper presents the testing of an acousto-ultrasonic piezoelectric sensor based structural health monitoring system for real-time monitoring of fatigue cracks and disbonds in bonded repairs. The system utilizes a network of distributed miniature piezoelectric sensors/actuators embedded on a thin dielectric carrier film, to query, monitor and evaluate the condition of a structure. The sensor layers are extremely flexible and can be integrated with any type of metal or composite structure. Diagnostic signals obtained from a structure during structural monitoring are processed by a portable diagnostic unit. With appropriate diagnostic software, the signals can be analyzed to ascertain the integrity of the structure being monitored. Details on the system, its integration and examples of detection of fatigue crack and disbond growth and quantification for bonded repairs will be presented here.

Proceedings Article | 17 May 2005 Paper

High speed hybrid active system

Ignacio Gonzalez, Fu-Kuo Chang, Peter Qing, Amrita Kumar, David Zhang

Proceedings Volume 5765, (2005) https://doi.org/10.1117/12.601476

KEYWORDS: Sensors, Actuators, Fiber optics sensors, Diagnostics, Fiber Bragg gratings, Ferroelectric materials, Aluminum, Optical filters, Aerospace engineering, Ultrasonics

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Proceedings Article | 5 May 2005 Paper

Practical issues in real-world implementation of structural health monitoring systems

Shawn Beard, Amrita Kumar, Xinlin Qing, H. Chan, Chang Zhang, Teng Ooi

Proceedings Volume 5762, (2005) https://doi.org/10.1117/12.605757

KEYWORDS: Sensors, Structural health monitoring, Composites, Calibration, Sensor networks, Reliability, Actuators, Inspection, Active remote sensing, Environmental sensing

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Proceedings Article | 14 July 2004 Paper

Potential applications of SMART Layer technology for homeland security

Amrita Kumar, H. Felix Wu, Mark Lin, Shawn Beard, Xinlin Qing, Chang Zhang, Michael Hamilton, Roy Ikegami

Proceedings Volume 5395, (2004) https://doi.org/10.1117/12.537064

KEYWORDS: Sensors, Homeland security, Composites, Missiles, Diagnostics, Manufacturing, Actuators, Metals, Inspection, Radar

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Proceedings Article | 14 August 2003 Paper

Monitoring the integrity of filament-wound structures using built-in sensor networks

Mark Lin, Amrita Kumar, Xinlin Qing, Shawn Beard, Samuel Russell, James Walker, Thomas Delay

Proceedings Volume 5054, (2003) https://doi.org/10.1117/12.483877

KEYWORDS: Composites, Sensors, Sensor networks, Rockets, Manufacturing, Diagnostics, Inspection, Domes, Aluminum, Prototyping

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Proceedings Article | 15 July 2002 Paper

Advances in utilization of structurally integrated sensor networks for health monitoring in commercial applications

Mark Lin, Amrita Kumar, Xinlin Qing, Shawn Beard

Proceedings Volume 4701, (2002) https://doi.org/10.1117/12.474698

KEYWORDS: Sensors, Composites, Structural health monitoring, Manufacturing, Fiber optics sensors, Inspection, Sensor networks, Aerospace engineering, Actuators, Diagnostics

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Proceedings Article | 14 June 2001 Paper

SMART Layer and SMART Suitcase for structural health monitoring applications

Mark Lin, Xinlin Qing, Amrita Kumar, Shawn Beard

Proceedings Volume 4332, (2001) https://doi.org/10.1117/12.429646

KEYWORDS: Diagnostics, Sensors, Composites, Actuators, Interfaces, Signal processing, Inspection, Sensor networks, Structural health monitoring, Safety

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Showing 5 of 12 publications

Conference Committee Involvement (20)

NDE 4.0, Predictive Maintenance, Communication, and Energy Systems: The Digital Transformation of NDE

14 March 2023 | Long Beach, California, United States

NDE 4.0, Predictive Maintenance, and Communication and Energy Systems in a Globally Networked World

8 March 2022 | Long Beach, California, United States

NDE 4.0 and Smart Structures for Industry, Smart Cities, Communication, and Energy

8 March 2021 | Online Only, California, United States

Smart Structures and NDE for Industry 4.0, Smart Cities, and Energy Systems

27 April 2020 | Online Only, California, United States

Smart Structures and NDE for Energy Systems and Industry 4.0

4 March 2019 | Denver, Colorado, United States

Smart Structures and NDE for Industry 4.0

5 March 2018 | Denver, Colorado, United States

Industrial and Commercial Applications of Smart Structures Technologies XI

26 March 2017 | Portland, Oregon, United States

Industrial and Commercial Applications of Smart Structures Technologies X

21 March 2016 | Las Vegas, Nevada, United States

Industrial and Commercial Applications of Smart Structures Technologies IX

9 March 2015 | San Diego, California, United States

Industrial and Commercial Applications of Smart Structures Technologies VIII

11 March 2014 | San Diego, California, United States

Industrial and Commercial Applications of Smart Structures Technologies VII

10 March 2013 | San Diego, California, United States

Industrial and Commercial Applications of Smart Structures Technologies VI

12 March 2012 | San Diego, California, United States

Nondestructive Characterization for Composite Materials, Aerospace Engineering, Civil Infrastructure, and Homeland Security V

7 March 2011 | San Diego, California, United States

Industrial and Commercial Applications of Smart Structures Technologies V

7 March 2011 | San Diego, California, United States

Nondestructive Characterization for Composite Materials, Aerospace Engineering, Civil Infrastructure, and Homeland Security IV

8 March 2010 | San Diego, California, United States

Industrial and Commercial Applications of Smart Structures Technologies IV

8 March 2010 | San Diego, California, United States

Nondestructive Characterization for Composite Materials, Aerospace Engineering, Civil Infrastructure, and Homeland Security III

9 March 2009 | San Diego, California, United States

Industrial and Commercial Applications of Smart Structures Technologies III

9 March 2009 | San Diego, California, United States

Industrial and Commercial Applications of Smart Structures Technologies II

10 March 2008 | San Diego, California, United States

Industrial and Commercial Applications of Smart Structures Technologies

19 March 2007 | San Diego, California, United States

Showing 5 of 20 Conference Committees

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