Prof. Dongyan Xu Profile

Prof. Dongyan Xu

Professor at Purdue Univ

SPIE Involvement:

Author

Proceedings Article | 2 May 2019 Presentation + Paper

Sensitivity-based dynamic control frequency scheduling of quadcopter MAVs

Matthew Eagon, Zhan Tu, Fan Fei, Dongyan Xu, Xinyan Deng

Proceedings Volume 11009, 110090A (2019) https://doi.org/10.1117/12.2519105

KEYWORDS: Control systems, Micro unmanned aerial vehicles, Computing systems, Reliability, System identification, Vehicle control, Reverse modeling

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Micro aerial vehicles (MAVs), in particular, quadcopters, have seen increasing adoption in many application domains due to their flexible operations and versatile functions. By taking advantages of the inherent system inertia properties of the physical platform during MAV operations, satisfactory flight performance of the vehicle can be achieved despite a variety of internal and external disturbances including environment perturbations and cyber-physical attacks, provided the fault detection and control strategy is maintained with a proper lower bound of its operating frequency. From the control design perspective, such frequency bound depends heavily on the sensitivity of the system response to its dynamic properties including inertia and dynamic couplings. For a cyber-physical system, which is subject to various cyber and physical attacks, there is usually a large sensitivity difference between physical time scale and cyber time scale. With this fact, a properly designed fault-tolerant and control strategy can leverage the inertia property of the system to arrive at an optimal control frequency to save computational power while maintaining the flight performance. For many current MAVs, their control programs are usually executed at a fixed high-frequency, which provides no significant performance gains at most of the time. In this work, we perform a sensitivity analysis and quantification of the vehicle system to guide the design and optimization of customized on-board control and computational resources. By quantifying system sensitivity and its variation across different control channels (DOFs), the computational resources can be re-distributed and optimized to detect and reject cyber-physical attacks more efficiently. With the proposed method, the cyber and physical resources of the vehicle can be allocated by system demands, which can further enhance vehicle reliability and accomplish complicated security tasks. To demonstrate the effectiveness of the proposed method, we have conducted the simulated flight test with the real vehicle parameters.

Proceedings Article | 17 January 2005 Paper

Verifying data integrity in peer-to-peer media streaming

Ahsan Habib, Dongyan Xu, Mikhail Atallah, Bharat Bhargava, John Chuang

Proceedings Volume 5680, (2005) https://doi.org/10.1117/12.587201

KEYWORDS: Forward error correction, Receivers, Stars, Computer security, Data communications, Computing systems, Tolerancing, Switches, Data modeling, Computer simulations

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Proceedings Article | 7 January 2003 Paper

Analysis of a hybrid architecture for cost-effective streaming media distribution

Dongyan Xu, Heung-Keung Chai, Catherine Rosenberg, Sunil Kulkarni

Proceedings Volume 5019, (2003) https://doi.org/10.1117/12.484077

KEYWORDS: Computer simulations, Video, Computer architecture, Network architectures, Internet, Astatine, Quantitative analysis, Distributed computing, Multimedia, Computer engineering

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Proceedings Article | 10 December 2001 Paper

Finding service paths in a media service proxy network

Dongyan Xu, Klara Nahrstedt

Proceedings Volume 4673, (2001) https://doi.org/10.1117/12.449978

KEYWORDS: Multimedia, Network architectures, Image enhancement, Computer simulations, Composites, Video, Image compression, Algorithms, Video compression, Image quality

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Proceedings Article | 22 January 1999 Paper

Providing seamless QoS for multimedia multicast in wireless packet networks

Dongyan Xu, Baochun Li, Klara Nahrstedt, Jane Liu

Proceedings Volume 3528, (1999) https://doi.org/10.1117/12.337424

KEYWORDS: Multimedia, Switches, Forward error correction, Automatic repeat request, Video, Computer programming, Error control coding, Thulium, Receivers, Computer simulations

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Proceedings Article | 16 December 1998 Paper

End-to-end QoS support for adaptive applications over the Internet

Baochun Li, Dongyan Xu, Klara Nahrstedt, Jane Liu

Proceedings Volume 3529, (1998) https://doi.org/10.1117/12.333707

KEYWORDS: Optical tracking, Control systems, Detection and tracking algorithms, Internet, Algorithm development, Fuzzy logic, Systems modeling, Algorithms, Visual process modeling, Video

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Showing 5 of 6 publications

Conference Committee Involvement (5)

Multimedia Computing and Networking 2009

19 January 2009 | San Jose, California, United States

Multimedia Computing and Networking 2008

30 January 2008 | San Jose, California, United States

Multimedia Computing and Networking 2006

18 January 2006 | San Jose, California, United States

Multimedia Computing and Networking 2004

21 January 2004 | San Jose, California, United States

Multimedia Computing and Networking 2003

23 January 2003 | Santa Clara, CA, United States

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