scholarly journals Review on Development of High-Static–Low-Dynamic-Stiffness Seat Cushion Mattress for Vibration Control of Seating Suspension System

2020 ◽  
Vol 10 (8) ◽  
pp. 2887
Author(s):  
Linchuan Guo ◽  
Xu Wang ◽  
Rang-Lin Fan ◽  
Fengrong Bi
Keyword(s):  
Control System ◽  
Vibration Control ◽  
Active Control ◽  
Vibration Isolation ◽  
Dynamic Stiffness ◽  
Suspension System ◽  
Isolation Techniques ◽  
Seat Cushion ◽  
Passive Vibration Isolation ◽  
Double Diamond

This review focuses on studying passive vibration isolation techniques and their applications. Advantages and disadvantages of different vibration isolation techniques will be compared in order to find an innovative method to reduce seating suspension system vibration and improve the ride comfort of vehicles’ drivers. Quasi-zero stiffness (QZS) isolators of high-static–low-dynamic stiffness are found to have good application prospects in low-frequency vibration isolation. In order to improve the isolation performance of the seating suspension system, a specially made seat cushion will be studied where a quasi-zero stiffness (QZS) isolator such as a double-diamond isolator is selected as one of the cells/units/elements of the seat cushion mattress. The double-diamond isolator structure does not represent the whole seating suspension system. The transmissibility ratio of the double-diamond isolator is evaluated by analytical and simulation models and compared to that of a conventional linear spring isolator. Although the performance of the passive vibration isolation/control system is usually worse than that of the active or semi-active control system, the cost of the passive vibration isolation/control system is lower than that of the active and semi-active control system, and the relative simplicity of adding a vibration isolation cushion mattress in an existing passive seating suspension system makes it low in cost, easy to implement, and more attractive than the active and semi-active vibration control systems.

Hardware Design for Active Vibration Isolation Controller

2011 ◽  
Vol 211-212 ◽  
pp. 1061-1065
Author(s):  
Qiang Hong Zeng ◽  
Shi Jian Zhu ◽  
Jing Jun Lou ◽  
Shui Qing Xie
Keyword(s):  
Control System ◽  
Vibration Control ◽  
Active Control ◽  
High Speed ◽  
Vibration Isolation ◽  
Active Vibration Control ◽  
Signal Acquisition ◽  
Acceleration Sensor ◽  
Series Acceleration ◽  
Active Vibration

The active vibration control system are described in this paper, and the controller was designed for the active control system, the controller is based on ARM Cortex M3 microcontroller core, ICP series acceleration sensor is use for signal acquisition module, the A / D converter module was designed based on ADS1158 chip, the D/ A converter module was designed based on DAC8564 chip. The controller has the characteristics of high speed and versatility.

The Design and Application of Piezoelectric Friction Damper with Self-Powered and Sensing Control System

2010 ◽  
Vol 163-167 ◽  
pp. 2477-2481
Author(s):  
Na Xin Dai ◽  
Ping Tan ◽  
Fu Lin Zhou
Keyword(s):  
Control System ◽  
Vibration Control ◽  
Active Control ◽  
Mechanical Energy ◽  
Active Vibration Control ◽  
Friction Damper ◽  
Active Vibration ◽  
Self Powered ◽  
Control Equation ◽  
Converse Piezoelectric Effect

To make the active and semi-active vibration control system in civil engineering get rid of external power supply, a new piezoelectric friction damper with self-power and sensing is designed in this paper and a semi-active control system based on this damper is presented. This system includes three key parts: a piezoelectric friction damper, a power generator based on the piezoelectric stack electro-mechanical energy conversion and a control circuit. It makes full use of the direct and converse piezoelectric effect. At the same time, it also overcomes the deficiency that the frictional force as damping can not be accurately desired in semi-active vibration control system. On the basis of it, the control equation of PFD is formulated. Numerical simulations for seismic protection of story isolation equipped with this system excited by a historical earthquake are conducted by MATLAB. Skyhook control is used to command a piezoelectric friction damper in the semi-active control. It is noticed that only one accelerometer is needed to monitor the response to realize the skyhook control, which greatly simplifies the classical semi-active vibration control system.

Bridge Life Extension Using Semi-Active Vibration Control

2013 ◽  
Author(s):  
G. Nelson ◽  
R. Rajamani ◽  
A. Gastineau ◽  
A. Schultz ◽  
S. Wojtkiewicz
Keyword(s):  
Control System ◽  
Resonant Frequency ◽  
Vibration Control ◽  
Active Control ◽  
Active Vibration Control ◽  
Life Extension ◽  
Peak Strain ◽  
Steel Bridge ◽  
Active Vibration ◽  
Active Control System

The fatigue life of a bridge can be extended by fifty years just by reducing the peak strain levels it experiences by 33%. This paper utilizes a dynamic model of the Cedar Avenue tied arch steel bridge in Minnesota to investigate active control technologies for peak strain reduction. Simulations show that the use of passive structural modification devices such as stiffeners and dampers is inadequate to reduce the key resonant peaks in the frequency response of the bridge. Both active and semi-active vibration control strategies are then pursued. Active vibration control can effectively reduce all resonant peaks of interest, but is practically difficult to implement on a bridge due to power, size, and cost considerations. Semi-active control with a variable orifice damper in which the damping coefficient is changed in real-time using bridge vibration feedback can be practically implemented. Simulation results show that the proposed semi-active control system can reduce many of the resonant peaks of interest, but is unable to reduce the response at one key resonant frequency. Further analysis reveals that the location of the actuator on the bridge chosen for the semi-active controller is inappropriate for controlling the specific resonant frequency of issue. By modifying the actuator location, it would be possible to obtain control of all bridge resonant frequencies with the semi-active control system.

Design of Suspension Vibration Control System Based on ON-OFF Algorithm

2012 ◽  
Vol 482-484 ◽  
pp. 1213-1217
Author(s):  
Jie Yue ◽  
Jin Qiu Zhang ◽  
Yong Qiang Gao ◽  
Zhi Zhao Peng ◽  
Zhi Tao Shi
Keyword(s):  
Control System ◽  
Vibration Control ◽  
Suspension System ◽  
Signal Design ◽  
Single Chip ◽  
Control Effect ◽  
Damping Force ◽  
System A ◽  
Vehicle Suspension System ◽  
Control Accuracy

Aimed to satisfy damping force change requirement of vehicle MRF suspension vibration control system, a controller of MRF suspension system based on On-Off control algorithm is designed, and a control system is carried out. The system takes single chip AT90CAN128 which obey the CAN bus protocols as micro-controller, and it accomplish AD conversion of sensor signal, design of On-Off algorithm and output of PWM voltage power control signal. The system also is used in vibration control experiment of tracklayer vehicle suspension system. The experiment shows that the controller can improve control accuracy, and the control effect is obviously.

scholarly journals Analytical Investigation of MR Damper for Vibration Control: A Review

2021 ◽  
Vol 11 (1) ◽  
pp. 49-52
Author(s):  
K. Sumanth Ratna ◽  
C. Daniel ◽  
Anshika Ram ◽  
B. Siva Kumar Yadav ◽  
G. Hemalatha
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Control System ◽  
Vibration Control ◽  
Active Control ◽  
Mr Damper ◽  
Analytical Investigation ◽  
Seismic Resistance ◽  
Mr Dampers ◽  
Active Control System

Abstract In this paper, a vibration control system with magnetorheological (MR) damper investigation is reviewed. At first a MR damper is investigated analytically using various finite element method software and the performance is investigated using experimental. The MR Dampers are designed and modelled for a scaled down setup. The application is in seismic resistance of buildings, automobile, physical and biological. Finally, the damper is investigated using various technique and methods used to study the performance is reviewed. This device reduces the vibration in both active and semi active control system effectively.

Active Control for Whirling Motion of Flexible Rotor

1991 ◽  
Vol 3 (4) ◽  
pp. 360-364 ◽  
Author(s):  
Takakazu Ishimatsu ◽  
◽  
Takashi Shimomachi ◽  
Nobuyoshi Taguchi ◽  
Keyword(s):  
Control System ◽  
Vibration Control ◽  
Active Control ◽  
Active Vibration Control ◽  
Digital Controller ◽  
Flexible Rotor ◽  
Whirling Motion ◽  
Active Vibration ◽  
Electromagnetic Damper

In a rotational machine, unbalance on the rotor is formidable since it causes resonance synchronized with the rotation of the rotor. In order to suppress this unfavorable vibration, we built an active vibration control system of flexible rotor using an electromagnetic damper. Our control system is composed of a digital controller to suppress the rotationally synchronized whirling motion and also a conventional analogue controller. Using our control system, whirling motion of the rotor under various rotating speeds was suppressed significantly.

Study on the Application of Multi-Step Predictive Self-Tuning Arithmetic in Hybrid Isolation System

2009 ◽  
Author(s):  
Shifeng Hu ◽  
Shijian Zhu ◽  
MinJun Zhong ◽  
Qiwei He
Keyword(s):  
Control System ◽  
Vibration Isolation ◽  
Noise Spectrum ◽  
Well Performance ◽  
Isolation System ◽  
Isolation Technique ◽  
Vibration Isolation System ◽  
Radiated Noise ◽  
Passive Vibration Isolation ◽  
Self Tuning

The radiated noise caused by the vibration of the power plant equipment is in the low frequency band and contains discrete lines in the noise spectrum. Insertion of resilient isolators between the machinery and the base is one of the most common methods for controlling unwanted vibration and hence reducing the radiated noise. Passive and active vibration isolation systems have their own relative merits. Therefore, hybrid vibration isolation, a combination of passive and active isolation technique, is a solution to improve the vibration isolation effectiveness. In order to offset the deficiency of passive vibration isolation system of power equipment on ship, the control system of multi-step predictive self-tuning arithmetic in hybrid vibration isolation system was build. The model of the system was obtained and the design of control system was given. And the same time a example of system design was simulated and analyzed. The result showed that the control system of multi-step predictive self-tuning arithmetic in hybrid vibration isolation system can effectively offset the deficiency of passive vibration isolation system and the system have the well performance of robustness.

Integrated vibration isolation and energy harvesting via a bistable piezo-composite plate

2019 ◽  
Vol 26 (9-10) ◽  
pp. 779-789 ◽  
Author(s):  
Ze-Qi Lu ◽  
Dong Shao ◽  
Zhi-Wei Fang ◽  
Hu Ding ◽  
Li-Qun Chen
Keyword(s):  
Energy Harvesting ◽  
Composite Plate ◽  
Output Voltage ◽  
Vibration Isolation ◽  
Virtual Work ◽  
Dynamic Stiffness ◽  
Nonlinear Phenomena ◽  
Approximate Analytical Solutions ◽  
Passive Vibration Isolation ◽  
Vibration Transmissibility

In passive vibration isolation, a bistable composite plate can be used to generate high-static low-dynamic stiffness, and in vibratory energy harvesting, when used with piezoelectric film flexing, the bistable composite plate can enhance the performance via snap-through motion. In the present work, we designed a bistable piezo-composite plate for both vibration isolation and energy harvesting. The analytical model for performance prediction is derived from the virtual work principle and the composite elasticity. Displacement transmissibility and output voltage generation were analytically determined for different mechanical and electrical parameters. The results illustrate that the bistable piezo-composite plate improves the feasibility and effectiveness of the integration design. Hardening and softening nonlinear phenomena coexist in both the displacement transmissibility and the output voltage plot. Approximate analytical solutions and numerical simulations are in good agreement. Both analytical and numerical results demonstrate that, at a certain frequency bands, enhanced energy harvesting is accompanied by a vibration transmissibility reduction. Compared with a linear system with the bistable piezo-composite plate removed, it achieved a reduction in the displacement transmissibility of about 13 dB at 100 Hz, simultaneously, and produced a considerable output voltage of about 0.05 V.

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