Page 22 - ASME DSCC 2015 Program

Technical Program

efficient aeroelastic energy harvesting from hVac ducts The effects of Turbulence Length Scale on the perfomance of
Invited session paper. DSCC2015-9851 Piezoelectric Harvetsers
xiaokun Ma, Pennsylvania State University, University Park, PA, United Invited session paper. DSCC2015-9934
States, Christopher D. Rahn, Pennsylvania State University, State College, Yiannis Andreopoulos, oleg Goushcha, niell Elvin, City College of New
PA, United States York, New York, NY, United States, Amir Danesh-Yazdi, City College of New
York, Woodside, NY, United States
Piezoelectric energy harvesters can be used to scavenge energy for un-
attended sensors in heating ventilation and air conditioning (HVAC) ducts. The Effects of Turbulence Length Scale on the Performance of Piezoelectric
In this paper, an aeroelastic energy harvester using a pinned-pinned beam Harvetsers
is designed, modeled, and analyzed. To obtain the desired model, we use
Anchorless Design of Electromagnetic Vibration Energy Harvester for
nonlinear Euler-Bernoulli beam theory, a linear piezoelectric constitutive law,
Railroad
and nonlinear pressure dynamics. Compared with the traditional cantilever
Invited session paper. DSCC2015-9940
beam used by previous researchers, the pinned-pinned beam has a higher
Teng lin, Stony Brook University, Stony Brook, NY, United States,
frequency limit cycle and more efficient mode shape, which ensure higher
lirong Wang, lei Zuo, Virginia Tech, Blacksburg, VA, United States
power output at the same strain level. The pinned-pinned boundary condi-
tion also self-limits the response amplitude, limiting strain in the piezoelectric An electromagnetic energy harvester features anchorless mounting is
beam and premature failure. Simulation results show that the pinned-pinned designed and analyzed. It can harness electrical energy from railroad track
beam can harvest at least 4 times more average power than a cantilever deflections induced by passing trains. Anchorless mounting is designed to
beam with the same maximum strain. be easily installed on railroad sleepers without any change to the original
foundation, it utilize a spring reset mechanism to capture track motion.
optimize the Energy Harvesting Via Varying the Radius of Curvature of
This structure eliminates the need of anchoring on the railroad and further
a Piezoelectric Thunder
reduces any potential risk to change the railroad construction. An energy
Invited session paper. DSCC2015-9890
harvesting mechanism named mechanical motion rectifier (MMR) is created
fengxia Wang, Wei Wu, Vahid Alizadehyazdi, Amin Abedini, to overcome challenge in harnessing energy from the high pulse-like impact
Southern Illinois University Edwardsville, Edwardsville, IL, United States
and to transform bidirectional linear vibration into uni-directional rotational
In this work the energy harvesting performance of a piezoelectric curved motion at high efficiency. Dynamic modeling of MMR and harvester are
energy generator (THUNDER) is studied via experimental and analytical developed to reveal the working principle and verify overall design. The har-
methods. The analytical model of the THUNDER is created based on the vester is targeting at powering major track-side accessories or to be used as
linear mechanical electrical constitutive law of the piezoelectric material, the back-up power source to enhance track operational safety.
linear elastic constitutive law of the substrate, and the Euler-Bernoulli beam
ConTRIBuTED SESSIon
theory. With these linear modal functions, the Rayleigh-Ritz approach was
1-34-2 WA5 Advances in Robotics
used to then obtain the reduced mechanical electrical coupled modulation
Emerson Burkhart A 10:00am–12:00pm
equations. The analytical model is verified by the experimental results. Both
the experimental and analytical results of the THUNDER’s AC power output,
DC power output with Rectifier Bridge and a capacitor, as well as the power Session Chair: xinmin Liu, University of Chicago
output with a microcontroller energy harvesting circuit are reported. Based Session Co-Chair: Maria Castano, Michigan State University
on the theoretical model, the analytical solution of the DC power is derived A natural user Interface to Drive a Robotic fish
in terms of the vibration amplitude, frequency, and the electrical load. To
Contributed regular paper. DSCC2015-9749
harvest energy from low frequency vibration source by a piezoelectric
generator requires the piezoelectric device possessing low resonance Mauro de Bellis, paul phamduy, Maurizio porfiri, New York University
Polytechnic School of Engineering, Brooklyn, NY, United States
frequency and good flexibility. The THin layer UNimorph DrivER (THUNDER)
developed by Langley Research Center exhibits high power when it is used This study explores the use of natural user interfaces to engage users in an
as an energy generator and large displacement when it is used as an actu- interactive activity and excite them about the possibility of a robotics career.
ator. Compared to the less flexible PZT, although THUNDER is more difficult In this work, we propose a novel natural user interface platform for en-
to model, THUNDER has better vibration absorption capacity and higher hancing participant interaction by controlling a robotic fish in a set of tasks.
energy recovery efficiency. The effect of the THUNDER’s radius of curvature Specifically, we develop and characterize a new platform, which utilizes a
on energy harvesting efficiency is mainly investigated. We set the THUN- Microsoft Kinect and an ad-hoc communication protocol. Preliminary studies
DER’s radius of curvature as a dynamic tuning parameter which can tune the are conducted to assess the usability of the platform.
piezoelectric generators’ frequency with the source excitation frequency.

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