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WORLD CONGRESS ON SMART MATERIALS AND STRUCTURES
&
3
rd
International Conference on
POLYMER CHEMISTRY AND MATERIALS ENGINEERING
November 21-22, 2019 | Singapore
Joint event on
Materials Science and Nanotechnology | Volume: 03
Modeling and control of a shock absorber with tunable inertance and damping
An-Ding Zhu
1
, Li-Jun Qian
1
, Xian-Xu Bai
1
, Wei-Min Zhong
1
and
Norman M Wereley
2
1
Hefei University of Technology, China
2
University of Maryland, USA
I
nerter is a two-terminal mass element and the forces
applied at its two terminals are proportional to the
relative acceleration between the two terminals. The
proportional coefficient is called the inertance. The topic
of the inerter has received extensive attention because of
its unique advantages, such as small weight and no ground
restriction of the capacitor in the corresponding circuit
system counterpart as compared to the conventional mass
element. Inerter has been applied or studied as a passive
device in various vibration isolation systems. Aiming at
further improving the vibration isolation performance of the
systems, the topic of controllable inerter has received much
attention. The vibration isolation system with controllable
inertance and/or controllable damping has shown obvious
advantages compared with the conventional passive inerter-
spring-damper system.
Based on the structural design concept of “functional
integration”, we proposed and designed a shock absorber
with both controllable inertance and damping. The proposed
shock absorber is composed of a magnetorheological (MR)
damper, a MR clutch, a flywheel, a ball screw mechanism, a
spring and a housing. The controllable inertance is realized by
the coordination between the MR clutch and the flywheel.
The ball screw drives the flywheel to rotate together when a
certain current is applied to theMR clutch, that is, the inerter
works. The ball screw is disengaged from the flywheel when
applied no current and the inerter stops working. Thereby,
the switching of the working state of the inerter (inertance)
is realized by the applied current. In this paper, the shock
absorber is modeled, including the controllable inertance of
the MR inerter and the controllable damping force of the MR
damper. The controllable mechanical properties of the shock
absorber are analysed and evaluated. Nonlinear controller
for a 1/4 car system using the shock absorber is proposed
and verified.
Biography
An-Ding Zhu and Li-Jun Qian, currently working at Hefei University of
Technology, China. This presentation is part of a collaboration they
continued with Xian-Xu Bai who joined Hefei University of Technology
in 2013 and founded Laboratory for Adaptive Structures and Intelligent
Systems (LASIS) in 2016. His research interests are focused in two areas.
(i) Design, optimization, dynamics, and control of smart structures based
on smart materials, including magnetorheological fluids/elastomers
and magnetostrictive materials, applied to automotive and aerospace
systems, and (ii) Newmechatronics-based vehicle dynamics and control
in emphasis on intelligent/unmanned vehicles. He has authored over
50 international journal and conference articles. He is an inventor on 16
issued Chinese patents and 2 PCT US patents (pending). Currently, he
serves as an Associate Editor of Journal of Intelligent Material Systems
and Structures. He is a Committee Member of Adaptive Structures and
Materials System Branch of Aerospace Division of ASME. He is a peer
reviewer of over 30 international journals. He is a member of ASME,
SAE China and IEEE.
e:
bai@hfut.edu.cnMater Sci Nanotechnol, Volume: 03