Multi-Objective Optimization Design and Performance Comparison of Magnetorheological Torsional Vibration Absorbers of Different Configurations

Liu, Guisheng; Hu, Hongsheng; Ouyang, Qian; Zhang, Feng

doi:10.3390/ma16083170

Cited by 4 publications

(4 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It is worth noting that the MRF used in the experiment When the magnetic field is activated, the MRF enters a shear mode, initiating the rotation of the output disc. The torque is generated by optimising the shearing action of the MRF between the two discs and can be controlled by adjusting the current to achieve the total torque, denoted as T [40]:…”

Section: Mr Damper Designmentioning

confidence: 99%

Design and feasibility analysis of magnetorheological flexible joint for upper limb rehabilitation

Li,

Yang,

Zhang

et al. 2024

Smart Mater. Struct.

Self Cite

View full text Add to dashboard Cite

Traditional upper limb rehabilitation robots can only complete rehabilitation training according a predetermined trajectory, and its safety system is unreliable, the movement status of the affected limb cannot be adjusted or trained according to the expected torque of the human body. This study presents a flexible safety system for the rehabilitation of joints based on magnetorheological (MR) fluid. First of all, the MR dampers inverter has the advantages of large torque, fast response, controllable flexibility, and safety assurance. The range of motion tracks can be adjusted through the four-lever hinge mechanism, and the required driving force is provided by the motor actuator, and MR damper provides flexibility and variable damping characteristics for the output torque. The system adopts the force/position impedance safety control method, under the action of the internal position closed-loop controller, the MR upper limb rehabilitation flexible joint drives the affected limb to track to the safe position and carries out simulation to verify the accuracy of the system motion torque and position. The safe rehabilitation effect of the upper limb rehabilitation system under the three working conditions (Step, Incremental and Equation) of the interaction moment of the affected limb has been extensively studied. The simulation and experiment results show that the MR damper can control the upper limb rehabilitation system to achieve the desired effect under the condition of increasing and changing the interactive force of the patient, and the safety design of the upper limb rehabilitation robot based on MR is verified.

show abstract

Section: Mr Damper Designmentioning

confidence: 99%

Design and feasibility analysis of magnetorheological flexible joint for upper limb rehabilitation

Li,

Yang,

Zhang

et al. 2024

Smart Mater. Struct.

Self Cite

View full text Add to dashboard Cite

show abstract

“…Its output damping torque T D is primarily composed of two parts [23]. One part is the damping torque T τ generated by the MRF in the torsional vibration damper when undergoing the rheological effect.…”

Section: Dynamic Model Of Mrtvdmentioning

confidence: 99%

“…Yang and Guo designed a control system for multiple MR dampers, and via modal analysis and nonlinear time history analysis, the effectiveness of the MR control system was demonstrated, significantly attenuating the torsional vibrations of eccentric structures [22]. Liu et al provided a convenient optimization design method for magnetorheological torsional vibration absorbers by analyzing axial single-coil configuration, axial multi-coil configuration, and circumferential configuration [23]. Li et al developed a novel magnetorheological torsional vibration absorber with variable stiffness and damping, employing independent damping control and independent stiffness control to suppress the torsional vibrations of transmission systems, thus validating the effectiveness of semi-active control in attenuating torsional vibrations in transmission systems [24].…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on the Skyhook Control of a Magnetorheological Torsional Vibration Damper

Wang,

Hu,

Yang

et al. 2024

Micromachines

Self Cite

View full text Add to dashboard Cite

This study proposes a dual-coil magnetorheological torsional vibration damper (MRTVD) and verifies the effectiveness of semi-active damping control to suppress the shaft system’s torsional vibration via experimental research. Firstly, the mechanical model of the designed MRTVD and its coupling mechanical model with the rotating shaft system are established. Secondly, the torsional response of the shaft system is obtained via resonance experiments, and the influence of the current on the torsional characteristics of the magnetorheological torsional damper is analyzed. Finally, the MRTVD is controlled using the skyhook control approach. The experimental results demonstrate that when the main shaft passes through the critical speed range at various accelerations, the amplitude of the shaft’s torsional vibration decreases by more than 15%, and the amplitude of the shaft’s torsional angular acceleration decreases by more than 22%. These conclusions validate the inhibitory effect of MRTVD on the main shaft’s torsional vibrations under skyhook control.

show abstract

“…The use of smart materials in the robot transmission structure [ 15 , 16 ] can achieve better control during use [ 17 , 18 ]. Magnetorheological fluid (MRF) is a smart material consisting of soft magnetic material particles, carrier fluid, and surfactant, and its fluid properties can be changed reversibly according to the external magnetic field [ 19 , 20 ]. MRFs have the advantages of adjustable damping, a wide dynamic range, and a fast response time [ 21 , 22 ].…”

Section: Introductionmentioning

confidence: 99%

Design and Control of Upper Limb Rehabilitation Training Robot Based on a Magnetorheological Joint Damper

Zhu,

Hu,

Zhao

et al. 2024

Micromachines

Self Cite

View full text Add to dashboard Cite

In recent years, rehabilitation robots have been developed and used in rehabilitation training for patients with hemiplegia. In this paper, a rehabilitation training robot with variable damping is designed to train patients with hemiplegia to recover upper limb function. Firstly, a magnetorheological joint damper (MR joint damper) is designed for the rehabilitation training robot, and its structural design and dynamic model are tested theoretically and experimentally. Secondly, the rehabilitation robot is simplified into a spring-damping system, and the rehabilitation training controller for human movement is designed. The rehabilitation robot dynamically adjusts the excitation current according to the feedback speed and human–machine interaction torque, so that the rehabilitation robot always outputs a stable torque. The magnetorheological joint damper acts as a clutch to transmit torque safely and stably to the robot joint. Finally, the upper limb rehabilitation device is tested. The expected torque is set to 20 N, and the average value of the output expected torque during operation is 20.02 N, and the standard deviation is 0.635 N. The output torque has good stability. A fast (0.5 s) response can be achieved in response to a sudden motor speed change, and the average expected output torque is 20.38 N and the standard deviation is 0.645 N, which can still maintain the stability of the output torque.

show abstract

Multi-Objective Optimization Design and Performance Comparison of Magnetorheological Torsional Vibration Absorbers of Different Configurations

Cited by 4 publications

References 30 publications

Design and feasibility analysis of magnetorheological flexible joint for upper limb rehabilitation

Design and feasibility analysis of magnetorheological flexible joint for upper limb rehabilitation

Experimental Study on the Skyhook Control of a Magnetorheological Torsional Vibration Damper

Design and Control of Upper Limb Rehabilitation Training Robot Based on a Magnetorheological Joint Damper

Contact Info

Product

Resources

About