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This lecture will highlight the computational and experimental
efforts at the University of Michigan to better understand the
impact of large deformations on the aeroelastic characteristics
of these flexible vehicles, in particular, an experimental program
to evaluate in flight some of the unusual aircraft behaviors that
can be predicted by our codes. The unmanned aerial vehicle,
known as X-HALE, has been designed and built to be
aeroelastically representative of (HALE) very flexible aircraft.
The objective of this test bed is to fundamentally understand
the physics involved in the presence of geometric nonlinearities,
collect unique data of the geometrically nonlinear aeroelastic
response coupled with the flight dynamics in support to code
validation, and as an inexpensive platform for nonlinear control
exploration. An outlook on the remaining challenges and future
activities will conclude the lecture.
Bio: Carlos E. S. Cesnik is the Clarence L. “Kelly” Johnson
Collegiate Professor of Aerospace Engineering and the
founding Director of the Active Aeroelasticity and Structures
Research Laboratory. He also directs the Airbus-Michigan
Center for Aero-Servo-Elasticity of Very Flexible Aircraft
(CASE-VFA). His research interests have focused on
computational and experimental aeroelasticity of very flexible
aircraft; coupled nonlinear aeroelasticity and flight dynamic
response in high-altitude long-endurance (HALE) aircraft and
advanced jet transport aircraft; aerothermoelastic modeling,
analysis, and simulation of hypersonic vehicles; and active
vibration and noise reductions in helicopters.
Professor Cesnik is a Fellow of the American Institute of
Aeronautics and Astronautics (AIAA) and a Fellow of the
Royal Aeronautical Society. He serves as AIAA’s Director for
the Aerospace Design and Structures Group and is an elected
member of AIAA’s Council of Directors. He has over 300
publications as archival journal and conference papers, and
several invited lectures in the areas of aeroelasticity, smart
structures, structural mechanics, and structural health
monitoring.
Track 3: Advances in Aerospace Technology
3-1-2: ADVANCES IN AEROSPACE TECHNOLOGY
Monday, November 11, 9:45AM–10:30AM
Room 255C, Journal of Structural Health Monitoring. He is also a Fellow
Calvin L. Rampton Salt Palace Convention Center
Design of Advanced Multifunctional Composites for
Fly-by-Feel Autonomous Electric Vehicles
(IMECE2019-13994)
Fu-Kuo Chang
Stanford University
xxxvi Abstract: It is envisioned that the next generation aerospace
vehicles will be eco-friendly and designed towards being
fully autonomous and highly intelligent to achieve optimal
performance with highest safety assurance for all operational
conditions. The vehicles will be equipped with high-resolution
state-sensing and self-awareness capabilities to diagnose their
health and operating states on a real-time basis, mimicking the
sensory skins of biological systems and enabling “fly-by-feel”
capabilities. In addition, the vehicles will be powered by hybrid
or electric propulsion systems using energy provided by
advanced high-energy batteries.
In this presentation, a robust and cost-effective manufacturing
technique is proposed to create a new class of Multifunctional
Energy Storage Composites (MESC) that can be used to
design specifically for the next generation autonomous electric
vehicles. The MES Composites will be built with distributed
stretchable sensors/electronics networks and embedded
lithium-ion batteries to form a completely integrated intelligent
material system. Utilizing novel microfabrication methods,
the sensor networks can be fabricated in nano/micro scales
and then be stretched in several orders of magnitude to be
embeddable into composite structures. A novel interlocking
fabrication technique is developed to seamlessly integrate
lithium-ion batteries into composites without sacrificing the
structural integrity of the host while maintaining the energy
capacity and electrical performance of the original battery
materials. The fly-by-feel technology concept was successfully
demonstrated in real time in a wind tunnel experiment on a
composite wing with integrated sensor networks. At the same
time, the health of the integrated batteries could be monitored
simultaneously using the built-in sensor networks. Prototypes
of the multifunctional energy-storage composites were
fabricated and demonstrated the feasibility of providing up
to 40% weight savings on the combined battery and structural
weight of existing commercial electric vehicles.
Bio: Fu-Kuo Chang is a Professor in the Department of
Aeronautics and Astronautics at Stanford University. His
primary research interest is in the areas of multi-functional
materials and intelligent structures with particular emphases
on structural health monitoring, self-sensing diagnostics,
intelligent sensor networks, and multifunctional energy
storage composites for transportation vehicles as well
safety-critical assets. Dr. Chang is a recipient of the SHM
Lifetime Achievement Award (2004), SPIE NDE Lifetime
Achievement Award (2010), and the PHM lifetime Achievement
Award (2018). He is the Editor-in-Chief of the International
of AIAA and ASME.