Parametric study on the performance of automotive MR shock absorbers

Gołdasz, Janusz; Dzierżek, Sławomir

doi:10.1088/1757-899x/148/1/012004

Cited by 10 publications

(6 citation statements)

References 8 publications

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“…Due to their characteristics MR materials can be used in absorbers and isolators in different areas. MR fluids are used in dampers [15][16], rotary brakes and clutch systems [17], sandwich structures for vibration control of flexible structures [18], etc. On the other hand, MR elastomer applications can be seen in vibration isolators [19], dampers [20], etc.…”

Section: Application Of Mr Materials In Soft Robots 31 Absorbers Sementioning

confidence: 99%

State of the art of soft robotic applications based on magneto-rheological materials

Gutenko

2020

MATEC Web Conf.

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Soft robotics is a new and exciting field of robotics which heavily relies on compliant materials. Soft robots attempt to copy the motion of living organisms and their adaptation mechanisms to the environment. New efforts in this field have paved way for the use of specific materials, e.g. electroactive polymers and/or magnetoactive (magnetorheological) MR elastomers. In this paper the author discusses the fundamental characteristics of MR fluids and elastomers, that allow them to be used as elements/components of soft robots. The advantages of using soft robots and the scope of applications for such robots are presented. The advantages and disadvantages of using MR fluids and elastomers in such soft robots are also considered. The history of the development of the idea of using MR fluids and elastomers in soft robots is presented, too. Possible applications for soft robots based on MR fluids and elastomers are considered. Various solutions for constructing a robotic gripper using MR fluids and elastomers are presented. Based on the above solutions, an analysis is made of the development of such technologies and the main problems are identified that will be the goal of solving them in the near future.

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Section: Application Of Mr Materials In Soft Robots 31 Absorbers Sementioning

confidence: 99%

State of the art of soft robotic applications based on magneto-rheological materials

Gutenko

2020

MATEC Web Conf.

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“…The current driver is a PWM (pulse width modulated) unit and it contains a PID regulator for controlling input signal's duty cycle. In this analysis the author utilizes the lumped parameter model of the control coil as highlighted in [10] (equations omitted here for the sake of brevity). As a remainder, the model utilized the control coil in the main loop and a secondary coil in the parasitic circuit (as a way of including the eddy currents in a simplified fashion).…”

Section: Controller-damper System Simulationsmentioning

confidence: 99%

Prototyping an MR damper system

Trębacz¹

2018

ELECTROTECHNICAL REVIEW

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Prototyping an MR damper system Streszczenie. Tłumiki magnetoreologiczne (MR) należą do grupy semi-aktywnych urządzeń wykorzystującyc tzw. ciecze inteligentne. Ciecz magnetoreologiczna jest zawiesiną cząstek ferromagnetycznych I nalezy do grupy materiałów o sterowalnych właściwościach reologicznych. Ciecz MR umieszczona w polu magnetycznym zmianie zmienia lepkość pozorną. Zmiana ta jest szybka i odwracalna, a końcowy stan materiału zależy od natężenia pola magnetycznego. Dzięki temu materiały te znalazły zastosowanie w semi-aktywnych układach redukcji drgań. Zaprojektowanie tłumika MR o odpowiednich osiągach jest jednak zadaniem złożonym. W niniejszym artykule autor przedstawia koncepcję budowy modelu systemu MR obejmującego tłumik i regulator PWM. Na wybranym przykładzie przedstawiono wyniki obliczeń polowych magnetostatycznych i harmonicznych obwodu tłumika. Wyniki obliczeń posłużyły m.in. do budowy modelu obwodu sterującego tłumika o parametrach skupionych z regulatorem. Budowa modelu systemu MR obejmującego tłumik i regulator PWM.

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“…MRF is most commonly used in dampers, especially in (a) the primary suspension systems of vehicles [ 8 , 9 , 10 , 11 , 12 , 13 ], (b) the secondary suspension of driver seats in trucks [ 14 , 15 , 16 , 17 , 18 ], (c) the damping of vibration for seismic activity protection [ 19 , 20 , 21 , 22 ], or (d) the damping of cable bridge vibrations caused by wind and rain [ 23 , 24 ]. Semi-active control can be easily applied to magnetorheological (MR) dampers.…”

Section: Introductionmentioning

confidence: 99%

Novel Approaches to the Design of an Ultra-Fast Magnetorheological Valve for Semi-Active Control

et al. 2021

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This article presents a list of suitable techniques and materials leading to the design of an ultra-fast magnetorheological (MR) valve. Two approaches for achieving the short response time are proposed: (a) by means of material, and (b) by means of the shape. Within the shape approach, the revolutionary technique of 3D metal printing using a selective laser melting (SLM) method was tested. The suitability of the materials and techniques is addressed based on the length of the response time, which is determined by the FEM. The simulation results determine the response time of the magnetic flux density on the step signal of the current. Subsequently, the response time is verified by the measurement of the simple magnetorheological valve. The following materials were tested: martensitic stainless steel AISI 420A (X20Cr13), cutting steel 11SMn30, pure iron for SLM, Sintex SMC STX prototyping material, ferrite N87, and Vacoflux 50. A special technique involving grooves was used for preventing eddy currents on materials with a high electrical conductivity. The simulation and experimental results indicate that a response time shorter than 2.5 ms can be achieved using materials such as Sintex SMC prototyping, ferrite N87, and grooved variants of metal pistons.

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Parametric study on the performance of automotive MR shock absorbers

Cited by 10 publications

References 8 publications

State of the art of soft robotic applications based on magneto-rheological materials

State of the art of soft robotic applications based on magneto-rheological materials

Prototyping an MR damper system

Novel Approaches to the Design of an Ultra-Fast Magnetorheological Valve for Semi-Active Control

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