Design and investigation of a novel magnetorheological brake with coils directly placed on side housings using a separating thin wall

Nguyễn, Ngọc Điệp; Nguyen, Tan Tien; Hiep, Le Dai; Nguyen, Quoc Hung

doi:10.1177/1045389x21993912

Cited by 17 publications

(17 citation statements)

References 19 publications

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“…Another solution to improve torque density and expand the use of MRFs in prostheses would be to take advantage of structures and arrangements of magnetic circuits used in other applications, such as vibrational and vehicular. Current strategies involve variable positioning of the coil (Nguyen et al, 2021a) and the optimization of the magnetic flux path by careful design of the overall structure (Nguyen et al, 2021b).…”

Section: Challenges and Directions For Future Researchmentioning

confidence: 99%

Magnetorheological fluid in prostheses: A state-of-the-art review

Dutra,

de Andrade,

Soares

et al. 2024

Journal of Intelligent Material Systems and Structures

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Magnetorheological fluids (MRF) are intelligent materials that can vary their yield stress in response to an applied magnetic field. This characteristic, combined with active and multifunctional control, allows the development of actuators with fast response time, low energy consumption, long service life, and reduced dimensions and weights. Various studies have been conducted to improve MR dampers in prosthetic applications, including knees, ankle-foot, hands, and sockets. Here, we present a critical review of the progress of MRFs in the prosthetic field. In addition, research in prostheses’ design, optimization, and control of magnetorheological actuators is investigated, along with MRF modeling, mode of operation, type of MR actuator, classification, and working principle of MRF-based devices. Although MRFs are considered promising materials for designing novel prosthetic devices, this review shows that applications have been predominantly focused on lower limb prostheses. We conclude by discussing possible future applications and challenges that must be faced to enable and improve commercial applications based on MRF technology.

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Section: Challenges and Directions For Future Researchmentioning

confidence: 99%

Magnetorheological fluid in prostheses: A state-of-the-art review

Dutra,

de Andrade,

Soares

et al. 2024

Journal of Intelligent Material Systems and Structures

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“…In this formula, Ω is the angular velocity of the rotor, r is the radius at evaluated point and d is the MRF gap size. In this research work, the MRF induced yield stress (τ y ) and post-yield viscosity (µ) are magnetic field dependent and approximately evaluated using experiment based curve fitting as followings [29]…”

Section: Braking Torque Analysismentioning

confidence: 99%

“…Over the years, a large number of magneto-rheological brake (MRB) configurations have been proposed to improve their braking torque, compact size or mass and power consumption [17][18][19][20][21][22][23][24][25][26][27][28][29]. The original and well-known configuration of MRB is the disc-type [17][18][19].…”

Section: Introductionmentioning

confidence: 99%

“…However, similarly to other drum-type MRBs, the serpentine-flux MRB is only suitable for long thin available space. To overcome inherent drawbacks of conventional disc-type MRBs such as magnetic 'bottle neck' problem, high cost in assembly and maintenance as well as waste and contamination of MRF in coil rewiring or replacement, Nguyen et al proposed a new disc-type MRB with coils placed on each side of the housing and the coils are separated with the working MRF by a thin-wall [29], which is referred as TS_MRB in this paper. It was shown that, in comparison with the traditional disc-type MRB, the TS_MRB not only possesses advantages in elimination of magnetic 'bottle neck' problem, fabrication and maintenance works but also has smaller mass at the same maximum braking torque.…”

Section: Introductionmentioning

confidence: 99%

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Development of a novel magnetorheological brake with zigzag magnetic flux path

Nguyen¹,

Biên²,

Hiep³

et al. 2021

Smart Mater. Struct.

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In this research work, a novel disc-type configuration of magneto-rheological brake (MRB) with zigzag magnetic flux path is proposed. In this design, a rotor component consisting of several magnetic plates integrated in a disc made of non-magnetic material is implemented. A magnetic plate is separated with the others by nonmagnetic separators of the disc. Corresponding magnetic plates and separators are also implemented on the housing of the MRB. With this configuration, the magnetic flux line is forced to cross the MR fluid (MRF) duct from the disc to the housing at this separator and then from the housing to the disc at the next separator. This results in a zigzag magnetic flux path between the disc and the housing. The separators on each side of the housing are integrated on a bobbin, on which the magnetic coil is installed. When counter currents are applied to the coils on each side of the housing, a mutual magnetic field with zigzag flux lines across the MRF duct is generated. Based on the electromagnetic finite element and torque analysis, optimization problem considering the maximum achievable braking torque and the minimum mass of the MRB is performed. After that, optimal results of the MRB are obtained and compared with those of MRBs in previous works. Based on optimal results of the MRB with a maximum achievable braking torque of 20 Nm, an MRB prototype is fabricated and experimentally investigated to validate the simulation results.

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“…Specifically, to address the blocking problem of the EMB motor properly and to promote the development of vehicle chassis-by-wire, a new BBW actuator that consists of a magnetorheological (MR) clutch (MRC) and an EMB, that is, BBW-MRC, is proposed and investigated. The MRC that is based on the smart material -MR fluid [13][14][15] transmits torque rapidly, continuously, and can be adjusted reversely. The structural principle, mathematical model, and control strategy of the BBW-MRC are analyzed theoretically.…”

Section: Introductionmentioning

confidence: 99%

Principle design and control of a brake-by-wire actuator featuring magnetorheological clutch

Duan

Sun

Bai

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part D:

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Electro-mechanical brake (EMB), driven by a motor to push the brake pads to clamp the brake disk for braking, is considered as the future of vehicle braking system, because of its simple structure and controllable braking force. However, EMB must face the problem of motor blocking when it works in a long-time continuous braking condition. When the motor is blocking, the current in the coil windings is large enough to burn the motor down, leading to the failure of EMB, which is a great threat to driving safety. To solve the problem, a new brake-by-wire actuator featuring magnetorheological (MR) clutch (MRC) – an EMB combining with an MRC, i.e., BBW-MRC, is presented in this paper. Specifically, the BBW-MRC is composed of a driving motor, an MRC, a planetary gear reducer, a ball screw, brake pads, and a brake disk. The motor output is transmitted to the MRC through the reducer, and it is controlled in real-time, continuously, and as expected by the MRC via controlling its applied current. The ball screw is driven by the MRC and pushes the brake pads to clamp the brake disk to realize braking in time. The small-scaled BBW-MRC system and the corresponding test bench are developed, and a hierarchical control strategy applied to the BBW-MRC system is designed. Based on the test bench, a series of tests are carried out on the BBW-MRC system, including the stability test of the BBW-MRC system under a long-time braking condition, the braking force response test of the BBW-MRC, and the braking force tracking test. Research results show that: (1) the BBW-MRC system has a quick and accurate performance to track desired braking forces; (2) under long-time braking conditions, the braking force keeps stable and the surface temperature of the motor has a normal change; and (3) the braking force response time has a 53.5% improvement over the EMB that driven by the motor directly.

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Design and investigation of a novel magnetorheological brake with coils directly placed on side housings using a separating thin wall

Cited by 17 publications

References 19 publications

Magnetorheological fluid in prostheses: A state-of-the-art review

Magnetorheological fluid in prostheses: A state-of-the-art review

Development of a novel magnetorheological brake with zigzag magnetic flux path

Principle design and control of a brake-by-wire actuator featuring magnetorheological clutch

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