Inexpensive computation and ubiquitous embedded sensing, actuation, and communication provide tremendous opportunities for societal impact, but also great challenges in the design of networked control systems, because the traditional unity feedback loop that operates in continuous time or at a fixed sampling rate is not adequate when sensor data arrives from multiple sources, asynchronously, delayed, possibly corrupted, and — especially important for this project — the different entities that participate in the control system do not share a common clock.
Submitted by Joao Hespanha on January 22nd, 2019
Effective integration of large amounts of renewable energy into the grid is of utmost importance for sustainable future and greener smart cities. Due to the unpredictable variations in weather, over 80% of the available renewable energy from solar and wind sources cannot be harnessed effectively.
Submitted by Anonymous on January 22nd, 2019
Sponsor(s)
National Science Foundation
Contributor(s)
Nasim Uddin
Mohammad Haider
Remote Video
Submitted by Nassim Uddin on January 9th, 2018
This proposal is for research on the Mobile Automated Rovers Fly-By (MARS-FLY) for Bridge Network Resiliency. Bridges are often in remote locations and the cost of installing electricity and a data acquisition system in hundreds of thousands of bridges is prohibitive. The MARS-FLY project will develop a cyber-physical system (CPS) designed to monitor the health of highway bridges, control the loads imposed on bridges by heavy trucks, and provide visual inspectors with quantitative information for data-driven bridge health assessment requiring no electricity and a minimum of data acquisition electronics on site. For fly-by monitoring, GPS-controlled auto-piloted drones will periodically carry data acquisition electronics to the bridge and download the data from the sensors at a close range. Larger Imaging drones carrying infrared (IR) cameras will be used to detect detail damages like concrete delamination. The research objectives will be accomplished first, by wireless recharging of remote sensor motes by drone to enhance the sensor operational lifetime whereas wireless recharging of drone battery will extend the operational efficiency, payload, and drone range. The novel multi-coil wireless powering approach will provide an investigation of an engineered material i.e. metamaterial with the resonant link to enhance the power level and link distance, otherwise unachievable. Next, by a major scientific breakthrough in the utilization of small quantities of low quality sensor data and IR images to determine damage information at all levels: detection of a change in behavior, location, and magnitude; streamlining of reliability analysis to incorporate the new information of damage into the bridge's reliability index based on combined numerical and probabilistic approaches such as Ensemble Empirical Mode Decomposition with the Hilbert Transform; and finally detection of nonlinearities in the signals in a Bayesian Updating framework. Moreover, an instrumented drive-by vehicle will complement damage detection on the bridge. A Bayesian updating framework will be used to update the probability distribution for bridge condition, given the measurements. Image processing of the infrared images to distinguish between the environmental effects and the true bridge deterioration (e.g. delamination in concrete) will be used to develop a better method of site-specific and environment-specific calibration.
Award Number
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Institution
University of Alabama at Birmingham
Lead PI
Nassim Uddin
Performance Period
-
Sponsor
National Science Foundation
Co-PIs (text)
Mohammad Haider
Submitted by Nassim Uddin on November 28th, 2017
ABSTRACT
Submitted by Nassim Uddin on November 28th, 2017
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