Page 70 - ASME DSCC 2015 Program

Technical Program

Rapid Structure optimization of Multiple-Planetary-Gear Power-Split ConTRIBuTED SESSIon
Hybrid Powertrains 1-27-1 fA5 Modelling and Validation 1
Contributed regular paper. DSCC2015-9977 Emerson Burkhart A 10:00am–12:00pm
Weichao Zhuang, Nanjing University of Science and Technology, Ann Arbor,
MI, United States, xiaowu Zhang, huei peng, University of Michigan, Ann Session Chair: John Wagner, Clemson University
Arbor, MI, United States, liangmo Wang, Nanjing University of Science and Session Co-Chair: Shinhoon Kim, University of Waterloo
Technology, Nanjing, Jiangsu, China
Validation of fingertip force in the ACT Hand Index finger and Bond
In recent years, clutches have been used to create multi-mode power-split
Graph Tendon Model
hybrid electric vehicles (HEVs). Designing an HEV for optimal performance is
Contributed regular paper. DSCC2015-9620
computationally intensive because of the enormous design space. For sin-
gle planetary gear (PG) or a double-PG hybrid powertrains, the design with Raymond King, Stephen Mascaro, University of Utah, Salt Lake City, UT,
the best fuel economy and launching performance can be identified through United States, Taylor niehues, Prashant Rao, Ashish Deshpande,
The University of Texas at Austin, Austin, TX, United States
exhaustive search. Exhaustive search for a hybrid powertrain with 3PGs is
computationally expensive, because of the astronomical number of design The Anatomically Correct Testbed (ACT) Hand was designed to allow
candidates. To address the design problem with extremely large design researchers to explore the properties of the human hand without the need
space, a rapid structure optimization method is proposed, which is based on for cadaver specimens. Previous experiments to validate the anatomical
combining different operating modes. A case study compares several differ- accuracy of the ACT Hand have been performed to comparing the moment
ent schemes against the results of the exhaustive search. The results show arms, the mechanical advantage of the tendons on each joint, to cadaver
that the proposed mode combination method can identify almost 90% of the studies. Here, an experiment involving the individual tendon loading of the
best designs. The proposed method shows great potential when applied to ACT index finger was performed as additional anatomical validation of the
hybrid systems with three or more PGs. ACT Hand. These experiments were used to compare the ACT index finger
online Power Management With Embedded optimization for a to an index finger cadaver study and validate a bond graph model of the
Multi-Source Hybrid With Dynamic Power Sharing Between index finger tendon system. The results showed agreement (less than two
Components standard deviations) between the fingertip forces of the ACT index finger
Contributed regular paper. DSCC2015-9758 and cadaver studies. The results also showed agreement (less than one
standard deviation) between the fingertip forces of the ACT index finger and
Bedatri Moulik, dirk Söffker, University of Duisburg-Essen, Duisburg, NRW, the presented bond graph tendon model.
Germany
Dynamic Model of launching Process for novel Gas Gun and Its
Online Power Management with Embedded Optimization for a Multi-source
Validation
Hybrid with Dynamic Power Sharing Between Components
Contributed regular paper. DSCC2015-9631
Li feng, Bai yun Shan, Zhu yongqing, Institute of System Engineering,
China Academy of Engineering Physics, Mianyang, China
Launching process of gas gun involves valve opening, gas flowing, and
bullet moving, etc, which is complex and difficult to describe clearly, and
establishing an accurate dynamic model of the process is meaningful to
gas gun design and analysis. The dynamic model of launching process for
a novel gas gun is originally posted in this paper, which is described with a
series of equations according to mass conservation equations, gas equation
of state, Newton’s second law, relationship of movement and space. And
the key parameters such as muzzle velocity, gas pressure, and time taken to
open valve are calculated based on the dynamic model above-mentioned.
Then, the bullet launching experiment was designed and implemented, and
muzzle velocity of the bullet was measured. The deviation of the muzzle ve-
locity calculated based on the dynamic model and the velocity measured in
the experiment is less than 3 percents, which shows that the dynamic model
established could describe the launching process of the gas gun accurately.

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