Design of a Novel Quasi-Zero-Stiffness Based Sensor
System for Measurement of Absolute Vibration
Motion*
Yu Wang
1
1 Department of Mechanical Engineering
The Hong Kong Polytechnic University
Hong Kong, PR China
Xingjian Jing
1,2
2 Hong Kong Polytechnic University Shenzhen Research
Institute, Shenzhen, PR China
xingjian.jing@polyu.edu.hk
Abstract— This study presents the analysis and design of a
novel quasi-zero-stiffness (QZS) based vibration sensor system
for measuring absolute displacement of vibrating platforms. The
QZS property is employed to create a broadband vibration-free
point for the absolute displacement measurement. Theoretic
analysis is conducted for understanding of the influence of
critical structure parameters on system measurement
performance. Experimental testing results with a prototype
verify the effectiveness of this novel sensor system.
Keywords— Quasi-zero-stiffness system, Vibration
measurement, Displacement sensor systems, Nonlinear stiffness
I. INTRODUCTION
Vibration problems are commonly existing in industrial
fields, which may cause mechanical structure damage and/or
un-comfort to users. Different methods have been developed
for vibration isolation including passive, active and semi-active
methods [16,17]. Usually, isolation systems composed by
simple springs and dampers are very popular in engineering
practice as a cheap and passive vibration isolation method.
There are also many studies on how to improve these passive
vibration isolation systems by using novel structures [1-3]. In
active or semi-active vibration isolation, magnetorheological
fluid (MRF) dampers are extensively studied [4-6]. However,
to apply active vibration isolation, one key factor is to acquire
accurate vibration signals including amplitude, velocity,
acceleration and/or frequency. For example, in automotive
industry, acceleration sensors are used widely as the
measurement of vibration motion. However, this method often
faces problems such as time delay and error accumulation. In
order to achieve the absolute vertical displacement of a vehicle,
the signal from the acceleration sensor needs to be integrated to
acquire the velocity signal. One more time of integration gives
the position signal. The problem is that accumulative errors
could be very too big to be used and the time delay may
deteriorate the measurement result seriously. For a dynamic
system, the introduced time delay will also bring complexity
for data reorganization and analysis, and also leads to
instability of the feedback control loop. Some researchers
proposed to use laser distance sensors [7] or GPS devices to
measure absolute displacement, but the cost and space needed
to install them may be a handicap.
Several quasi-zero-stiffness (QZS) systems have been
studied as alternative and excellent passive vibration isolation
methods in the literature [8, 9]. Recently, the feasibility of
application of the QZS systems to vibration measurement has
been theoretically investigated by the authors in [10]. Based on
the QZS characteristic [11], the QZS based sensor can create
an absolute stable point in a broadband frequency domain
which can thus be possibly employed for vibration
measurement very well. This method can solve the problems of
time delay and cumulative errors mentioned above since the
relative displacement between the created stable point and
other vibrating points can be easily measured by using various
sensors such as load cells. Based on this idea, a novel QZS-
based sensor system is developed, analyzed, and tested
systematically in this study. It is shown that the QZS system
can be well employed for absolute displacement measurement
in vibrating platforms such as vehicles with rather high
accuracy in a broadband frequency domain. Different from the
theoretical results in [11], critical design factors (including pre-
deformation ratios, frictions, linkage mass etc) which affect the
accuracy of this novel sensor system in application are
investigated carefully with experiment validations. The
measurement signal with this sensor can be applied to active
vibration isolation/control systems such as active suspensions
or semi-active suspensions on vehicles [13-15]. The proposed
system is easy to design and fabricate, and corresponding
design parameters can be adjusted conveniently to fulfil
measurement accuracy.
II. THE
PROPOSED SENSOR SYSTEM
In the proposed model showed in Fig. 1, two extension
springs hook the upper surface and bottom surface of the mass
separately to limit the mass to vibrate in the vertical direction
and provide positive stiffness. This layout also offers the
advantage of more stability because extension springs do not
have the problem of bending as compression springs. Four
arms with compression springs are distributed around the mass.
The springs are assembled with pre-deformation which offers
the feature of negative stiffness. Each arm are designed to have
sharp ends which can be inserted into the grooves on the mass
and mounting plates to reduce friction and limit the vibration
amplitude of the mass. This feature can also help to limit
rotational motion. Screws are used on the outside of the arms
*The work is partially supported by a NSFC project of China (No
61374041) and a GRF project of Hong Kong RGC (No.15206514).
978-1-4799-7862-5/15/$31.00 © 2015 IEEE
资源评论
weixin_38531210
- 粉丝: 2
- 资源: 917
最新资源
- blender做的路径跟随
- GeoGebra绘制并计算定积分的源文件
- Pycharm官网-重新格式化并重新排列代码.pdf
- FileZilla下载安装
- proteus基于stm32仿真的H桥电机控制
- 阿里云通用文本批量翻译API测试脚本
- 广告活动数据集，广告投放数据，广告绩效效果数据，适用于营销分析、绩效预测的机器学习模型
- 微软亚洲研究院出租车轨迹数据集
- cmake的学习之cmake的源文件
- 咖啡优惠数据集，营销活动数据，包含了关于咖啡店客户奖励优惠的详细信息，包括优惠详情、客户人口统计信息以及客户活动事件
- Python 3.13.1版本常见问题解答文档（中文完整版）
- 三维GIS+CesiumLab+3dTiles格式转换
- 基于Matlab Simulink的锂离子电池SOC估计技术研究：采用卡尔曼滤波、扩展卡尔曼滤波与无迹卡尔曼滤波方法，结合二阶RC等效电路模型实现高精度SOC估计,Matlab Simulink卡尔曼
- 基于Matlab的七自由度车辆模型与主动控制悬架系统：参数可调的仿真研究,基于matlab的七自由度车辆模型，七自由度悬架主动控制，matlab simulink七自由度车辆模型，悬架具有主动控制力的
- ,【四自由度半车主动悬架PID和LQG控制建模与仿真】 【车辆工程专业本科毕设】 题目：基于主动悬架的车辆平顺性优化研究 模型：在Simulink中搭建车辆四自由度状态空间方程模型，包含车身垂向运动
- "基于Matlab的多能源微网双层调度模型：多时间尺度滚动优化交互控制框架及其实证研究",基于Matlab的多时间尺度滚动优化的多能源微网双层调度模型，建立了一个基于交互控制的双层两阶段框架，以实现互
资源上传下载、课程学习等过程中有任何疑问或建议，欢迎提出宝贵意见哦~我们会及时处理！
点击此处反馈
