Development and Control Experiments of MR-Fluid Actuator.

Takesue, Naoyuki; Furusho, Junji; Sakaguchi, Masamichi; Kiyota, Y.

doi:10.1299/kikaic.67.3525

Cited by 6 publications

(5 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Since the MR fluid causes the maximum yield stress of about 50 to 100 kPa, and it responds within several milliseconds, it has attracted much attention as a new material for improving mechanical systems and has been studied by numerous researchers (5) - (14) . We have developed a clutch which can control the transmitted torque according to a magnetic field, by using MR fluid (15) - (18) . An MR-fluid actuator that consists of an input component, the clutch and an output component, was proposed.…”

Section: Magnetorheological (Mr) Fluidmentioning

confidence: 99%

“…In the previous paper (18) , we proposed a method of designing MR-fluid actuators on the basis of magnetic circuit theory and examined basic experiments of an actuator developed based on this design method. The results showed that the static properties agreed well with the designed properties.…”

Section: Magnetorheological (Mr) Fluidmentioning

confidence: 99%

“…Since the yield stress of the MR fluid changes according to the strength of the applied magnetic field, the output torque can be controlled by adjusting the coil current. For details, refer to our previous paper (18) .…”

Section: Mechanism Of Mr-fluid Actuatormentioning

confidence: 99%

See 2 more Smart Citations

Fast Response MR-Fluid Actuator

Takesue

Furusho

Kiyota

2004

JSME international journal. Series C, Mechanical systems, machi

Self Cite

View full text Add to dashboard Cite

Magnetorheological (MR) fluids are materials that change their rheological behavior upon applying a magnetic field. They have been promising as functional fluids that can improve the properties of mechanical systems. We have developed an actuator using MR fluid. In the previous paper, a method of designing MR-fluid actuators was proposed on the basis of magnetic circuit theory. The basic experiments were carried out and static properties that agreed well with the design were obtained. However, the transient response, which was not considered in the design phase, was not very fast. In this study, we investigate the dynamics of the MR-fluid actuator and aim to improve the response. The transient magnetic analysis is examined in consideration of the eddy current. Two approaches to improving the response are proposed. Finally, we realize a much faster MR-fluid actuator.

show abstract

Section: Magnetorheological (Mr) Fluidmentioning

confidence: 99%

Section: Magnetorheological (Mr) Fluidmentioning

confidence: 99%

See 1 more Smart Citation

Fast Response MR-Fluid Actuator

Takesue

Furusho

Kiyota

2004

JSME international journal. Series C, Mechanical systems, machi

Self Cite

View full text Add to dashboard Cite

show abstract

“…Despite the fact that the response time of MR fluid itself is in the range of 1–2 ms (Carlson and Jolly, 2000), several studies have reported relatively slow response time (40–100 ms) in MR devices (e.g. An and Kwon, 2003; Choi et al, 1999; Jeon et al, 1999; Takesue et al, 2001). The main objective of this study is to perform a combined finite element analysis (FEA) and statistical analysis to characterize the design parameter effect on the dynamic response of MR clutches in order to provide a guideline for designing fast response MR actuators for robotic and haptic applications while focusing specifically on the dynamic response of magnetic fields.…”

Section: Introductionmentioning

confidence: 99%

Frequency response analysis of magneto-rheological clutch designs

Yadmellat

Patel

2017

Journal of Intelligent Material Systems and Structures

View full text Add to dashboard Cite

This article presents the frequency response analysis performed on two different geometrical configurations of magneto-rheological clutches including disk-based and drum-based configurations. For each configuration, two sub-configurations with inner coil and outer coil designs are studied. The configurations are thoroughly studied with respect to the effect of design parameters on the bandwidth of magneto-rheological clutches using finite element analysis and by considering the effect of eddy currents and the skin effect in the magnetic circuit. The N-way analysis of variance is used to study the effect of the main parameters as well as interaction between the parameters on the bandwidth. Furthermore, trade-offs between the effect of the main parameters and the torque capacity are discussed.

show abstract

“…For example, Sakaguchi et al (4) applied an ER-fluid in a rehabilitation-training device for upper limbs of patients, which assisted in training students. Takesue et al (5) clarified the dynamic characteristics of a rotational actuator using an MR-fluid. However, the controlability of MR-fluids for rehabilitation-training devices in clinical situations has not been considered.…”

Section: Introductionmentioning

confidence: 99%

Torque Control of a Rehabilitation Teaching Robot Using Magneto-Rheological Fluid Clutches

Hakogi

Ohaba

Kuramochi

et al. 2005

JSME international journal. Ser. B, Fluids and thermal engineer

View full text Add to dashboard Cite

A new robot that makes use of MR-fluid clutches for simulating torque is proposed to provide an appropriate device for training physical therapy students in knee-joint rehabilitation. The feeling of torque provided by the robot is expected to correspond to the torque performance obtained by physical therapy experts in a clinical setting. The torque required for knee-joint rehabilitation, which is a function of the rotational angle and the rotational angular velocity of a knee movement, is modeled using a mechanical system composed of typical spring-mass-damper elements. The robot consists of two MR-fluid clutches, two induction motors, and a feedback control system. In the torque experiments, output torque is controlled using the spring and damper coefficients separately. The values of these coefficients are determined experimentally. The experimental results show that the robot would be suitable for training physical therapy students to experience similar torque feelings as needed in a clinical situation.

show abstract

Development and Control Experiments of MR-Fluid Actuator.

Cited by 6 publications

References 0 publications

Fast Response MR-Fluid Actuator

Fast Response MR-Fluid Actuator

Frequency response analysis of magneto-rheological clutch designs

Torque Control of a Rehabilitation Teaching Robot Using Magneto-Rheological Fluid Clutches

Contact Info

Product

Resources

About