Semi-Active Control for Vibration of Transmission Tower-Line with MRD

2014 ◽  
Vol 680 ◽  
pp. 422-425
Author(s):  
Wei Kong ◽  
Yun Fei Tao ◽  
Shi Guang Men
Keyword(s):  
Active Control ◽  
Control Algorithm ◽  
Mr Damper ◽  
Control Device ◽  
Transmission Tower ◽  
Passive Devices ◽  
Control Devices ◽  
Self Powered ◽  
Technological Means ◽  
Magneto Rheological

Magneto-rheological (MR) damper is a semi-active control device, which takes advantage of both the reliability of passive devices and the adaptability of fully active control devices and is widely used on many kinds of machines and civil works. But there are some particular problems when the MRD is used on transmission tower-line system.This article is aimed to introduce the technological means to these problems such as :choose sant colony algorithm as the suitable semi-active control algorithm; consider adopting Self-Powered/Self-Sensing structure to Increased general OS stability;

A Reliability Assessment Model for MR Damper Components within a Smart Structural Control Scheme

2008 ◽  
Vol 56 ◽  
pp. 218-224
Author(s):  
Maguid H.M. Hassan
Keyword(s):  
Structural Control ◽  
Inverse Dynamics ◽  
Mr Damper ◽  
Assessment Model ◽  
Resistance Force ◽  
Mr Dampers ◽  
Control Scheme ◽  
Smart Control ◽  
Control Devices ◽  
Magneto Rheological

Smart control devices have gained a wide interest in the seismic research community in recent years. Such interest is triggered by the fact that these devices are capable of adjusting their characteristics and/or properties in order to counter act adverse effects. Magneto-Rheological (MR) dampers have emerged as one of a range of promising smart control devices, being considered for seismic applications. However, the reliability of such devices, as a component within a smart structural control scheme, still pause a viable question. In this paper, the reliability of MR dampers, employed as devices within a smart structural control system, is investigated. An integrated smart control setup is proposed for that purpose. The system comprises a smart controller, which employs a single MR damper to improve the seismic response of a single-degree-of-freedom system. The smart controller, in addition to, a model of the MR damper, is utilized in estimating the damper resistance force available to the system. On the other hand, an inverse dynamics model is utilized in evaluating the required damper resistance force necessary to maintain a predefined displacement pattern. The required and supplied forces are, then, utilized in evaluating the reliability of the MR damper. This is the first in a series of studies that aim to explore the effect of other smart control techniques such as, neural networks and neuro fuzzy controllers, on the reliability of MR dampers.

Intelligent Driver for Magneto-Rheological Damper Based on Digital Signal Controller

2013 ◽  
Vol 462-463 ◽  
pp. 788-793
Author(s):  
Shan Yun Huang ◽  
Zhao Bo Chen ◽  
Feng Chen Tu
Keyword(s):  
Control Algorithm ◽  
Hierarchical Control ◽  
Mr Damper ◽  
Digital Signal ◽  
Drive Current ◽  
Digital Signal Controller ◽  
Magneto Rheological ◽  
Hardware Circuit

A novel intelligent driver based on digital signal controller (DSC) has been put forward for magneto-rheological (MR) damper. The working principles of MR damper were described, as well as the hardware circuit scheme of signal condition and MR damper driver etc. on account of TMS320F28335 DSC. A hierarchical control algorithm was designed and the studies for the performance of the driver were conducted. The results suggest that the driver could provide accurate drive current for MR damper, and meanwhile the respond time is less than 2ms, which can meet the drive requirements of MR damper.

Semi-Active Control for Large-Scale Aqueduct by MR Damper

2011 ◽  
Vol 204-210 ◽  
pp. 645-648
Author(s):  
Liang Huang ◽  
Bo Wang ◽  
Jian Guo Xu
Keyword(s):  
Active Control ◽  
Seismic Design ◽  
Mechanical Model ◽  
Large Scale ◽  
Mr Damper ◽  
Earthquake Excitation ◽  
Active Method ◽  
Reference Base ◽  
Active Devices ◽  
Magneto Rheological

The mechanical model of magneto rheological damper(MRD) is established, and the numerical simulation of seismic responses of aqueduct under earthquake excitation is performed with magneto rheological dampers. The results indicated that the magneto rheological dampers are effective in reducing the aqueduct response, the mitigation rate of semi-active control approaches with the active method The results from the present study may serve as a reference base for seismic design of large-scale aqueducts, and provide theoretical basis of aqueduct using semi-active devices.

Research on Control Effectiveness of Semi-Active MR-TMD to some Coal Gas Manufacturing Plant

2011 ◽  
Vol 117-119 ◽  
pp. 3-8
Author(s):  
An Zhi Yan ◽  
Qi Kong ◽  
Jing Jing Lu
Keyword(s):  
Control Algorithm ◽  
Control Device ◽  
Structural Vibration ◽  
Model Structure ◽  
Control Effect ◽  
Structural Vibration Control ◽  
Control Effectiveness ◽  
Magneto Rheological ◽  
Factory Building ◽  
Better Than

A new semi-active MR-TMD control device, which is consisted of TMD which take the gasifier as the damper mass and a magneto-rheological damper, was proposed to solve the problem of factory building vibration when the gasifier is working in it. The feasibility and effectiveness of semi-active MR-TMD control system for structural vibration control under rectangular periodic excitations were simulated and analyzed by adopting one semi-active control algorithm proposed by the author. The control effect of semi-active MR-TMD, passive TMD and active AMD were compared by adopting the same model structure. Numerical simulations show that the damping performance of using semi-active MR-TMD control is better than that of using passive TMD control and active AMD control; the displacement and acceleration of the structure’s each floor have decreased significantly. It also indicates that the semi-active controlling method is available.

Vibration suppression of railway vehicles using a magneto-rheological fluid damper and semi-active virtual tuned mass damper control

2019 ◽  
Vol 67 (6) ◽  
pp. 493-507
Author(s):  
Ji-Hwan Shin ◽  
Jin-Ho Lee ◽  
Won-Hee You ◽  
Moon K. Kwak
Keyword(s):  
Control Algorithm ◽  
Mr Damper ◽  
Tuned Mass Damper ◽  
Railway Vehicle ◽  
Car Body ◽  
Fluid Damper ◽  
Mass Damper ◽  
Damper Control ◽  
Magneto Rheological ◽  
Mr Fluid Damper

A semi-active virtual tuned mass damper (SAVTMD) control algorithm is developed to suppress vibrations of a railway vehicle by using magneto-rheological (MR) damper. To this end, a virtual-tuned-mass-damper control algorithm analogous to the tuned mass damper was developed prior to the semi-active application. The proposed SAVTMD control algorithm uses the acceleration of the car body directly, so that it is more practical than the sky-hook control algorithm that uses the velocity of the car body. The application of the SAVTMD control to a real MR fluid damper is discussed, and a step-by-step procedure to calculate the command voltage to the driver of the MR fluid damper is presented. A hardwarein-the-loop simulation system developed in the previous study is used to test the SAVTMD control algorithm. The theoretical and experimental results showed that the proposed SAVTMD control algorithm is more effective than is the semi-active sky-hook control in suppressing vibrations of the car body of the railway vehicle by the MR damper.

Semi Active Control of Chaos in Systems Excited by Non-Ideal DC Motor

2011 ◽  
Vol 110-116 ◽  
pp. 5367-5372
Author(s):  
Saeed Farokhi ◽  
Aghil Yosefi Komma ◽  
Zohreh Bayat
Keyword(s):  
Active Control ◽  
Control Method ◽  
Mr Damper ◽  
Dc Motor ◽  
Viscous Damper ◽  
Control Of Chaos ◽  
Linear Spring ◽  
Chaotic Characteristic ◽  
Magneto Rheological ◽  
Active Control Method

In this paper, semi active control of non-ideal mechanical system with Magneto-Rheological (MR) damper is presented. The setup composed of a motor operating on a structure with mass M connected to a fixed frame by a non-linear spring and with a linear viscous damper. From the investigations carried out it is possible to observe the DC motor influence on the vibrating system along with non-periodic motions with chaotic characteristic. To control this system linear viscose damper is substituted by MR damper. A semi-active control method, sky-hook control is used in this study. Our results suggest that the addition of a MR damper turns the phase space smoother and it is so effective to suppress chaos.

Testing and Modeling of MR Damper and Its Application to SDOF Systems Using Integral Backstepping Technique

2009 ◽  
Vol 131 (2) ◽  
Author(s):  
Sk. Faruque Ali ◽  
Ananth Ramaswamy
Keyword(s):  
Active Control ◽  
Testing Machine ◽  
Mr Damper ◽  
Control Device ◽  
Magnetorheological Damper ◽  
Input Current ◽  
Magnetorheological Dampers ◽  
Damper Control ◽  
Nonlinear Devices ◽  
Current Monitoring

Magnetorheological dampers are intrinsically nonlinear devices, which make the modeling and design of a suitable control algorithm an interesting and challenging task. To evaluate the potential of magnetorheological (MR) dampers in control applications and to take full advantages of its unique features, a mathematical model to accurately reproduce its dynamic behavior has to be developed and then a proper control strategy has to be taken that is implementable and can fully utilize their capabilities as a semi-active control device. The present paper focuses on both the aspects. First, the paper reports the testing of a magnetorheological damper with an universal testing machine, for a set of frequency, amplitude, and current. A modified Bouc–Wen model considering the amplitude and input current dependence of the damper parameters has been proposed. It has been shown that the damper response can be satisfactorily predicted with this model. Second, a backstepping based nonlinear current monitoring of magnetorheological dampers for semi-active control of structures under earthquakes has been developed. It provides a stable nonlinear magnetorheological damper current monitoring directly based on system feedback such that current change in magnetorheological damper is gradual. Unlike other MR damper control techniques available in literature, the main advantage of the proposed technique lies in its current input prediction directly based on system feedback and smooth update of input current. Furthermore, while developing the proposed semi-active algorithm, the dynamics of the supplied and commanded current to the damper has been considered. The efficiency of the proposed technique has been shown taking a base isolated three story building under a set of seismic excitation. Comparison with widely used clipped-optimal strategy has also been shown.

Study on a Semi-Active Shock Isolation Technology with Magnetorheological Devices

2010 ◽  
Vol 26-28 ◽  
pp. 770-775
Author(s):  
Yu Fei Wang ◽  
Lin He ◽  
Xue Yang
Keyword(s):  
Active Control ◽  
Control Strategy ◽  
Control Algorithm ◽  
Stable State ◽  
Relative Displacement ◽  
Shock Acceleration ◽  
Passive Devices ◽  
Simulation Results ◽  
Shock Isolation ◽  
Active Control Strategy

A semi-active shock isolation technology with magnetorheological devices was systematically studied. The magnetorheological devices consist of magnetorheological dampers (MRD) and magnetorheological elstomers (MRE) isolator. Based on the method of Lyapunov function, the semi-active control strategy and the control algorithm were developed to minimize the relative movement of the system. The simulation results show that, compared with the passive devices, the semi-active control technology in the paper is effective to reduce the relative displacement and the shock acceleration of protected equipment. And the system will go back to the stable state within ultrashort time.

INVESTIGATION OF MR DAMPER INFLUENCE ON PATROL VEHICLE VIBRATIONS LIMITATION WITH NUMERICAL SIMULATION

2011 ◽  
Vol 159 (1) ◽  
pp. 294-301
Author(s):  
Maciej ZAJĄC ◽  
Wiesław GRZESIKIEWICZ ◽  
Michał MAKOWSKI
Keyword(s):  
Numerical Simulation ◽  
Control Algorithm ◽  
Mr Damper ◽  
Vehicle Suspension ◽  
Damping Force ◽  
Vertical Accelerations ◽  
Magneto Rheological

This paper describes a control algorithm for a damping system equipped with a magneto-rheological damper (MR). A method of vibration limitation by a controlled MR damper has been presented. The model of the vehicle suspension has been built using DADS software and the control algorithm in the Simulink software. As a criterion of optimising the damping force, the index characterising vertical accelerations has been used.

Study on integrated response-based adaptive strategies for control and placement optimization of multiple magneto-rheological dampers-controlled structure under seismic excitations

2021 ◽  
pp. 107754632110004
Author(s):  
Zubair R Wani ◽  
Manzoor Tantray
Keyword(s):  
Structural Control ◽  
Control Algorithm ◽  
Control Strategies ◽  
Adaptive Strategies ◽  
Performance Criteria ◽  
Optimal Placement ◽  
Design Algorithm ◽  
Performance Objective ◽  
Control Devices ◽  
Magneto Rheological

The application and optimization of control systems with multiple magneto-rheological dampers integrated into a civil engineering structure is a challenging task. The performance of the control system is strongly linked with the location and arrangement of control devices, and the optimal placement of control devices is inherently linked with the performance objective of the control algorithm. Therefore, for semi-active control devices, the placement algorithm should be well rooted within the control algorithm, for effective structural control. This article proposes response-based adaptive control strategies embedded with the device location optimization algorithm. The acceleration and inter-story drift responses of the structure are considered as the performance objective for two separate control strategies. The flexibility of this approach lies in the fact that the design algorithm for control and location of magneto-rheological dampers can be engineered based on the performance criteria of the system. This study involves numerical simulation of an actual five-story framed structure. The simulation results indicated that the seismic performance of the structure is strongly linked with the number, placement of the magneto-rheological damper, and the performance objective of the control strategy used. Also, the configuration and corresponding control provided by the response-based adaptive strategies performed better than the configuration predicted by the benchmark genetic algorithm using the H2/LQG controller.

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