Membership Project Updates
Integrated, optimized, and robust nonlinear energy harvesting solutions for self-powered system condition monitoring sensors
Ryan Harne, PhD, assistant professor in the Department of Mechanical and Aerospace Engineering serves as PI for the project Integrated, optimized and robust nonlinear energy harvesting solutions for self-powered system condition monitoring sensors. This project delivers localized electric power sources for numerous sensors and devices by converting the kinetic energies of the vehicles into sufficient DC power for the local electronics. The technical challenges surrounding this project involve establishing robust methods that effectively capture and convert the vibration energies available despite the time-varying nature of the vehicle and sub-system motions. Harne and his team use theoretical, simulation and experimental methods to illuminate the complex, electromechanical dynamic framework at hand, and consider realistic input vibrations, such as those measured from vehicles in motion, to characterize the optimality of the DC power delivery from such vibration energy harvesters.
The demands of light-weighting and material efficiency for vehicle systems encourage the innovative use of all energy resources available, said Harne.
Beyond PKI: Enhanced Cybersecurity via MIMO
Emre Koksal, PhD, associate professor in the Department of Electrical and Computer Engineering serves as PI for the project Beyond PKI: Enhanced Cybersecurity via MIMO. MIMO, or, multiple input, multiple output, is an antenna technology for wireless communications where multiple antennas are used at both the source (transmitter) and the destination (receiver).
The untethered nature of the open wireless medium of V2X communication opens the door for a wide range of cybersecurity vulnerabilities, said Koksal. Message authentication in V2X communication is based on public key infrastructure (PKI) where a certificate authority is responsible for issuing, managing, distributing and revoking certificates.
In this project, Koksal and his team first develop a physical-layer assisted enhancement to PKI-based message authentication via the use of a receive antenna-array. The scheme makes use of the information contained in DSRC beacon messages to validate the claimed GPS location information with the Angle of Arrival information obtained at the physical layer. The proposed scheme offers a signal processing tool for physical cross verification in order to integrate the existing conventional PKI message authentication with the available physical-layer information. Next, they will extend the idea of the use of the antenna array for cybersecurity to provide a novel secret key agreement protocol. And finally, the team will implement their algorithms in software-defined radios and conduct high-mobility experimentation on TRC grounds. Learn more>>