Chia Yu Lin and Steven L. Manley. Bromoform production from - ASLO

Workshop 9: Passive Nonlinear Targeted Energy
Transfer in Coupled Oscillators
Sunday, August 28, 2011
8:00am–12:00pm Location: Concord
Instructors: Alexander F. Vakakis
(avakakis@illinois.edu)
Lawrence A. Bergman
(lbergmany@illinois.edu)
D. Michael McFarland
(dmmcf@illinois.edu)
Overview:
In this tutorial, the presenters will discuss the fundamentals and
some applications of a new, fully passive, paradigm for
protecting critical systems from destructive force and motion
inputs: targeted energy transfer (TET). The novelty of this
approach is its applicability to wide-band and transient inputs,
as well as the usual narrow-band and steady-state excitations.
The method represents a new and unique application of strong
intentional nonlinearity, the nonlinear energy sink (NES), a local,
simple, lightweight subsystem capable of completely altering
the global behavior of the primary system to which it is attached.
The underlying mechanism, a series of transient resonance
captures and escapes, combined with nonlinear beating
phenomena associated with excitation of special impulsive
orbits which comprise the bridges to TET, provides an entirely
different passive approach to quickly, efficiently, and nearly
irreversibly moving vibration energy in a preferred, a priori
selected direction from the primary system to an NES where it
can be localized and harmlessly dissipated. Some first
applications of TET through the use of both smooth and
discontinuous NESs will be demonstrated in the areas of
aeroelastic flutter suppression, vibration and shock isolation,
blast protection and seismic mitigation. Additional potential
applications of the technology currently under investigation,
such as vibration control of bluff bodies in flow, broadband
acoustic attenuation, and broadband vibration amplification for
energy harvesting will be discussed.
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Workshop 10: Creative Design of Parallel
Mechanisms
Sunday, August 28, 2011
1:00pm–5:00pm Location: Congressional B
Instructors: Xianwen Kong (x.kong@hq.ac.uk)
Clement Gosselin
(gosselin@gmac.ulaval.ca)
WORKSHOPS
Overview:
During the past decade, significant progress has been made in
the type synthesis (creative design or conceptual design) of
parallel mechanisms. These advances have led to a concise
approach – the virtual-chain approach – to the type synthesis of
parallel mechanisms. In this approach, parallel mechanisms can
be constructed using several compositional units. Unfortunately,
it is not well realized that the virtual-chain approach can be
applied by engineers and researchers with basic knowledge in
mathematics and mechanisms (mechanics) taught in
undergraduate courses. In order to fill the gap between research
and practice, this tutorial aims at presenting the fundamental
principles of the virtual-chain approach to the type synthesis of
parallel mechanisms and at illustrating step by step how parallel
mechanisms are constructed using this approach. As a byproduct,
one can carry out the mobility analysis of parallel
mechanisms following the reverse process of the type synthesis.
Then the type synthesis of translational parallel manipulators
with linear input-output equations will be discussed. Some open
issues in the type synthesis of parallel mechanisms, especially
parallel mechanisms with multiple operation modes and
compliant translational parallel manipulators, will also be
presented.