Study the Potential Application of Smart Fluid Material and Force Tracking Control of Magnetorheological Damper

2014 ◽  
Vol 699 ◽  
pp. 348-353
Author(s):  
Mohd Hanif Harun ◽  
Wan M. Zailimi Wan Abdullah ◽  
Hishamuddin Jamaluddin ◽  
Roslan Ab Rahman ◽  
Khisbullah Hudha ◽  
...  
Keyword(s):  
Potential Application ◽  
Tracking Control ◽  
Mr Damper ◽  
Magnetorheological Damper ◽  
Test Machine ◽  
Continuous State ◽  
Force Tracking ◽  
Linear Behaviour ◽  
Active Damper ◽  
Vehicle Suspension System

The aim of this paper is to study the potential application of magnetorhelogical (MR) fluid as a smart material used in semi-active damper of a vehicle suspension system. An MR damper was designed and fabricated and tested in the laboratory using damper test machine. The non-linear behaviour of the MR damper is modelled using third order polynomial model based on experimental data. Force tracking control is carried out in order to track the ability of the MR damper to produce force as close as possible with the desired force. Continuous state control is chosen for the inner loop controller of the MR damper. The performance of the proposed controller as a force-tracking controller is compared with the desired force produced by vehicle system. The results of the study shows that the proposed controller is able to track the desired force successfully.

scholarly journals Design of a Novel Magnetorheological Damper Adaptable to Low and High Stroke Velocity of Vehicle Suspension System

2020 ◽  
Vol 10 (16) ◽  
pp. 5586
Author(s):  
Bo-Gyu Kim ◽  
Dal-Seong Yoon ◽  
Gi-Woo Kim ◽  
Seung-Bok Choi ◽  
Aditya Suryadi Tan ◽  
...  
Keyword(s):  
Shape Function ◽  
Mr Damper ◽  
Effective Area ◽  
Magnetorheological Damper ◽  
Damping Coefficient ◽  
Vehicle Suspension ◽  
Damping Force ◽  
Piston Velocity ◽  
Suspension Systems ◽  
Vehicle Suspension System

In this study, a new class of magnetorheological (MR) damper, which can realize desired damping force at both low and high speeds of vehicle suspension systems, is proposed and its salient characteristics are shown through computer simulations. Unlike conventional MR dampers, the proposed MR damper has a specific pole shape function and therefore the damping coefficient is changed by varying the effective area of the main orifice. In addition, by controlling the opening or closing the bypass orifice, the drastic change of the damping coefficient is realizable. After briefly describing the operating principle, a mathematical modeling is performed considering the pole shape function which is a key feature of the proposed MR damper. Then, the field-dependent damping force and piston velocity-dependent characteristics are presented followed by an example on how to achieve desired damping force characteristics by changing the damping coefficient and slope breaking point which represents the bilinear damping property.

Comparative Study of Magnetorheological Damper Models for Force Tracking

2015 ◽  
Author(s):  
Anria Strydom ◽  
Werner Scholtz ◽  
Schalk Els
Keyword(s):  
Computational Efficiency ◽  
Ride Comfort ◽  
Mr Damper ◽  
Magnetorheological Damper ◽  
Damping Force ◽  
Suspension Systems ◽  
Mr Dampers ◽  
Damping Characteristics ◽  
Force Tracking ◽  
Control Application

Magnetorheological (MR) dampers are controllable semi-active dampers capable of providing a range of continuous damping settings. MR dampers are often incorporated in suspension systems of vehicles where conflicting damping characteristics are required for favorable ride comfort and handling behavior. For control applications the damper controller determines the required damper current in order to track the desired damping force, often by using a suitable MR damper model. In order to utilise the fast switching time capability of MR dampers, a model that can be used to directly calculate damper current is desired. Unfortunately few such models exist and other methods, which often negatively affect the computational efficiency of the model, need to be used when implementing these models. In this paper a selection of MR damper models are developed and evaluated for both accuracy and computational efficiency while tracking a desired damping force. The Kwok model is identified as a suitable candidate for the intended suspension control application.

scholarly journals Damping Force Tracking Control of MR Damper System Using a New Direct Adaptive Fuzzy Controller

2015 ◽  
Vol 2015 ◽  
pp. 1-16 ◽  
Author(s):  
Xuan Phu Do ◽  
Kruti Shah ◽  
Seung-Bok Choi
Keyword(s):  
Vibration Control ◽  
Tracking Control ◽  
Fuzzy Controller ◽  
Tracking Error ◽  
Mr Damper ◽  
Control Performance ◽  
Damping Force ◽  
Adaptive Fuzzy Controller ◽  
Adaptive Fuzzy ◽  
Force Tracking

This paper presents a new direct adaptive fuzzy controller and its effectiveness is verified by investigating the damping force tracking control of magnetorheological (MR) fluid based damper (MR damper in short) system. In the formulation of the proposed controller, a model of interval type 2 fuzzy controller is combined with the direct adaptive control to achieve high performance in vibration control. In addition,H∞(Hinfinity) tracking technique is used in building a model of the direct adaptive fuzzy controller in which an enhanced iterative algorithm is combined with the fuzzy model. After establishing a closed-loop control structure to achieve high control performance, a cylindrical MR damper is adopted and damping force tracking results are obtained and discussed. In addition, in order to demonstrate the effectiveness of the proposed control strategy, two existing controllers are modified and tested for comparative work. It has been demonstrated from simulation and experiment that the proposed control scheme provides much better control performance in terms of damping force tracking error. This leads to excellent vibration control performance of the semiactive MR damper system associated with the proposed controller.

Simulation on Force Tracking Control of a Magnetorheological Damper under Impact Loading

2014 ◽  
Vol 663 ◽  
pp. 158-162
Author(s):  
Alif Zulfakar bin Pokaad ◽  
Md Radzai bin Said ◽  
Fauzi bin Ahmad ◽  
Mohd Nazeri Kamaruddin
Keyword(s):  
Impact Loading ◽  
Mr Damper ◽  
Magnetorheological Damper ◽  
Experimental Result ◽  
Damping Force ◽  
Loop Control ◽  
Good Ability ◽  
Half Wave ◽  
Actual Force ◽  
Force Tracking

This paper focuses on the design of the control structure which consists of inner loop controller employed for MR damper under impact loading by using computer simulation. The simulation is done by using MATLAB 7.0. The structure of the inner loop control for the proposed MR damper model uses a simple PI control to achieve the desired force. In this simulation, the MR damper model that has been validated with the experimental result is used to simulate the actual force that produced by MR damper. The performance of inner loop controller to track the actual force produced by MR damper by obtaining the several input functions which are half wave of sinusoidal, saw-tooth, square and random functions of desired force with the variation in pendulum mass of 15 kg and 20 kg are investigated. It can be seen clearly that under several input functions, the proposed polynomial model with PI controller has the good ability to track the desired damping force under impact loading.

A mathematical modelling and experimental study of annular-radial type magnetorheological damper

2021 ◽  
pp. 1-18
Author(s):  
Elliza Tri Maharani ◽  
U. Ubaidillah ◽  
Fitrian Imaduddin ◽  
K.M. Wibowo ◽  
Dewi Utami ◽  
...  
Keyword(s):  
Experimental Study ◽  
Mathematical Modelling ◽  
Magnetorheological Damper ◽  
Test Machine ◽  
Damping Force ◽  
Passive Damper ◽  
Significant Difference ◽  
Force Velocity ◽  
Active Damper ◽  
Force Displacement

An experimental study was undertaken to evaluate the mathematical modelling of the magnetorheological (MR) damper featuring annular radial gap on its valve. The experiment was conducted using a fatigue dynamic test machine under particular excitation frequency and amplitude to get force-velocity and force-displament characteristics. Meanwhile, the mathematical modelling was done using quasi-steady modelling approach. Simulation using adaptive neuro fuzzy inference (ANFIS) Algorithm (Gaussian and Generalized Bell) were also carried out to portray the damping force-displacement modelling that is used to compare with the experimental results. The experimental characteristics show that amplitudes excitation and current input affect the result damping force value. The comparison of the experimental and mathematical results presented in this paper shows a significant difference in damping force value and that the quasi-steady modelling could not significantly approach the damping force-velocity results. Moreover, the semi-active damper is compared to the passive damper. The results show that a semi-active damper performs better than a passive damper because it only requires a little power. Based on the damping force-displacement modelling, it can be seen that Gaussian has a higher accuracy rather than Generalized Bell. Discussion on the energy dissipation and equivalent damping coefficient were also accomodated in this paper. Having completed in mathematical modelling and simulation, the damper would be ready for further work in-vehicle application that is development of control system.

Magnetorheological damper in semi-active vehicle suspension system using SDRE control for a quarter car model

2018 ◽  
Author(s):  
Maria Aline Gonçalves ◽  
Rodrigo Tumolin Rocha ◽  
Frederic Conrad Janzen ◽  
José Manoel Balthazar ◽  
Angelo Marcelo Tusset
Keyword(s):  
Suspension System ◽  
Magnetorheological Damper ◽  
Vehicle Suspension ◽  
Quarter Car Model ◽  
Car Model ◽  
Quarter Car ◽  
Vehicle Suspension System ◽  
Active Vehicle Suspension System

Designing Requirement of Spring and MR Damper for New Type Baby Car Seat

2015 ◽  
Vol 741 ◽  
pp. 28-31 ◽  
Author(s):  
Chang Hyun Cho ◽  
Seung Bok Choi
Keyword(s):  
Mr Damper ◽  
Modern Society ◽  
Magnetorheological Damper ◽  
Car Seat ◽  
Car Safety ◽  
New Type ◽  
Design Requirements ◽  
The Law ◽  
Car Accident ◽  
Safety Seat

In modern society, a plenty of car accident is occurred and a lot of people get injury every day. For this reason, the importance of car safety has been increased and car safety has been extensively studied. Especially in many countries, the law about using baby safety seat is legislated to protect babies and children from accident. Thus, recently numerous products for baby safety have been developed. In this paper, a new type baby car seat is proposed to protect babies and children from frontal accident. In order to achieve this goal, design requirements of spring and MR(Magnetorheological) Damper which are main elements for a new type baby car seat are investigated.

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