Speaker: Naehyuck Chang
Affiliation: Korea Advanced Institute of Science and Technology
Abstract: Extended driving range of electric vehicles is one of the most demanding requirements of the current and potential electric vehicle owners, but use of a larger-capacity battery pack makes the vehicle curb weight heavier and thus the fuel efficiency worse. In this talk, we introduce system-level solutions to enhance electric vehicle fuel efficiency with the current powertrain technologies. First, we develop an instantaneous power consumption modeling of electric vehicles by the curb weights, speed, acceleration, road slope, passenger and cargo weights, motor capacity, and so on, as a battery discharge model. We ensure the model fidelity as we fabricate a lightweight custom electric vehicle perform extensive measurement. The model fidelity enables us to achieve a more accurate range estimation.
We attempt both design and runtime energy optimization using the electric-vehicle-specific energy characteristics. We emphasize that electric vehicles show completely different fuel consumption behaviors from internal combustion engine vehicles due to the significant discrepancy in the drivetrain. We introduce minimum-energy driving methods for electric vehicles, which are largely different from eco-driving methods of internal combustion engine vehicles. We also propose a rapid energy-aware electric vehicle synthesis that allows users to quickly customize their own electric vehicle powertrain specification without understanding the technology. We proved electric vehicles are capable, efficient and promising on extreme off-roads through real trail run tests.
Biography: Naehyuck Chang is a Full Professor at the Department of Electrical Engineering, Korea Advanced Institute of Science and Technology (KAIST) from 2014. Before he joined KAIST, he was with the Department of Computer Science and Engineering, Seoul National University from 1997 to 2014. Dr. Chang also served as a Vice Dean of College of Engineering, Seoul National University from 2011 to 2013. His current research interests include low-power embedded systems and Design Automation of Things such as systematic design and optimization of Cyberphysical Systems. Dr. Chang is an ACM Fellow and an IEEE Fellow for contribution to low-power systems. He was the Chair of the ACM SIGDA and is the Editor-in-Chief of the ACM Transactions on Design Automation of Electronics Systems, and an Associate Editor of IEEE Transactions on Very Large Scale Integration Systems. Dr. Chang is the Technical Program Chair of DAC (Design Automation Conference) 2016. Dr. Chang is the winner of the 2014 ISLPED Best Paper Award, 2011 SAE Vincent Bendix Automotive Electronics Engineering Award, 2011 Sinyang Academic Award, 2009 IEEE SSCS International SoC Design Conference Seoul Chapter Award, and several ISLPED Low-Power Design Contest Awards in 2002, 2003, 2004, 2007, 2012, 2014, and 2017. Dr. Chang and his colleague introduced the world’s first extreme off-road electric Jeep Wrangler and recently finished the Rubicon Trail run for the first time in the history by an electric Jeep Wrangler with just a single recharging at the Rubicon Springs Basecamp.
Date(s) - Nov 17, 2017
11:00 am - 12:30 pm
E-IV Maxwell Room #57-124
420 Westwood Plaza - 5th Flr. , Los Angeles CA 90095