Design of a new miniature haptic button based on magneto-rheological fluids

Ryu, Semin; Yang, Tae‐Heon; Kim, Sang-Youn; Koo, Jeong‐Hoi; Kyung, Ki-Uk; Kwon, Dong‐Soo

doi:10.1109/coase.2012.6386463

Cited by 5 publications

(5 citation statements)

References 15 publications

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“…The device was designed and manufactured with a goal of minimizing thickness to convey kinesthetic and tactile feedback in miniature applications. The size of the proposed actuator is significantly thinner than previous designs utilizing smart materials (Jansen et al, 2010b;Mazursky et al, 2018;Ryu et al, 2012;Xu et al, 2018). In addition, the design is mechanically simple and easily controlled.…”

Section: Fabrication Of a Prototype Actuatormentioning

confidence: 90%

Design, modeling, and evaluation of a slim haptic actuator based on electrorheological fluid

Mazursky

Koo

Yang

2019

Journal of Intelligent Material Systems and Structures

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Realistic haptic feedback is needed to provide information to users of numerous technologies, such as virtual reality, mobile devices, and robotics. For a device to convey realistic haptic feedback, two touch sensations must be present: tactile feedback and kinesthetic feedback. Although many devices today convey tactile feedback through vibrations, most neglect to incorporate kinesthetic feedback. To address this issue, this study investigates a haptic device with the aim of conveying both kinesthetic and vibrotactile information to users. A prototype based on electrorheological fluids was designed and fabricated. By controlling the electrorheological fluid flow via applied electric fields, the device can generate a range of haptic sensations. The design centered on an elastic membrane that acts as the actuator’s contact surface. Moreover, the control electronics and structural components were integrated into a compact printed circuit board, resulting in a slim device suitable for mobile applications. The device was tested using a dynamic mechanical analyzer to evaluate its performance. The device design was supported with mathematical modeling and was in agreement with experimental results. According to the just-noticeable difference analysis, this range is sufficient to transmit distinct kinesthetic and vibrotactile sensations to users, indicating that the electrorheological fluid–based actuator is capable of conveying haptic feedback.

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Section: Fabrication Of a Prototype Actuatormentioning

confidence: 90%

Design, modeling, and evaluation of a slim haptic actuator based on electrorheological fluid

Mazursky

Koo

Yang

2019

Journal of Intelligent Material Systems and Structures

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“…The authors developed several versions of miniature haptic actuators based on MR fluids, and the details of the design and improvements of the actuators can be found in Ryu et al (2012, 2013, 2015) and Yang et al (2010, 2012). In order to orient the readers, this section strives to provide a recap of the design and construction of a newest prototype actuator.…”

Section: Haptic Actuatormentioning

confidence: 99%

“…The “delayed” force development and small force peaks at low pressed depths in Figure 3(a) seem to be attributed to air pockets escaping first, before the full activation of MR fluids. To relate these results to the performance matrix for haptics, the force rate (the ratio of the difference between the maximum and the minimum resistive forces to the maximum force at a given stroke) analysis is performed as in other haptic actuator studies (Ryu et al, 2012, 2015; Yang et al, 2010, 2012). Figure 3(b) shows the force rate variation with respect to the pressed depth or the stroke of the actuator for various input power values.…”

Section: Haptic Actuatormentioning

confidence: 99%

Mechanical and psychophysical performance evaluation of a haptic actuator based on magnetorheological fluids

Ryu

Koo

Yang

et al. 2016

Journal of Intelligent Material Systems and Structures

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This study presents a miniature haptic actuator (10 mm (L) × 10 mm (W) × 6.5 mm (H)) based on magnetorheological fluids, which is designed to provide realistic touch sensations to users. Its primary goals are to evaluate mechanical or actuation performances of the prototype magnetorheological actuator and to assess its effectiveness in conveying haptic sensations to users by conducting the psychophysical experiments. The mechanical performance study evaluated the prototype’s output forces from haptic perspectives using a dynamic test frame. The psychophysical experiments studied human subjects’ perceptions on haptic sensations produced by the prototype. The mechanical test results show that the magnetorheological actuator is capable of generating a wide range of frequency-dependent output forces (from 1.5 N to nearly 9 N). The psychophysical experiments show that the actuator offers various kinesthetic and vibrotactile sensations to human operators. Overall, the results suggest a feasibility of using the magnetorheological haptic actuator in real-world applications, such as a haptic keypad and functional buttons in small consumer electronics and hand-held devices.

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“…However, under the influence of a strong magnetic field, an MRF is transformed into a Bingham fluid [6] characterized by high viscosity and low fluidity. The increase in viscosity imparts solid-like properties to the fluid, and this occurrence is termed the magnetorheological effect [7,8]. Utilizing this effect, magnetorheological fluids (MRFs) have many applications in various fields, such as in the industrial sector, where external magnetic fields can be manipulated to regulate local flow resistance and pressure, thus maintaining bearing clearance under varying loads and enhancing bearing work stability [9,10].…”

Section: Introductionmentioning

confidence: 99%

Magnetorheological Fluid-Based Haptic Feedback Damper

Kang,

Liu,

Zeng

2024

Applied Sciences

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Damping involves the various frictional and other obstructive effects that attenuate free vibration. For a long time, people have mainly used it to make various dampers to reduce mechanical vibration and consume kinetic energy. It is widely used in fields such as aerospace, automotive, and consumer electronics. These dampers mainly act on mechanical structures. In recent years, with the rapid development of novel human–machine interaction methods and force/tactile feedback technology, the damper has begun to act on people, such as when a person interacts with a robot and their force is applied to a structure with damping. This type of damper requires variable damping, and the amount of variation is controlled by the magnitude of human action. This study used magnetorheological fluid (MRF) instead of traditional damping fluids, such as silicone oil, sesame oil, and mechanical oil. Magnetorheological fluid is a controllable fluid with magnetorheological effects, and its viscosity (hardness) can be changed by changing the nearby magnetic field. This study took the design of variable damping keyboard buttons with haptic feedback as an example to study the electromagnetic and dynamic models of variable dampers based on magnetorheological fluids. The experimental setup was designed and used to verify the haptic effectiveness of the scheme, which can be applied to the development of other haptic dampers that require variable damping.

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Design of a new miniature haptic button based on magneto-rheological fluids

Cited by 5 publications

References 15 publications

Design, modeling, and evaluation of a slim haptic actuator based on electrorheological fluid

Design, modeling, and evaluation of a slim haptic actuator based on electrorheological fluid

Mechanical and psychophysical performance evaluation of a haptic actuator based on magnetorheological fluids

Magnetorheological Fluid-Based Haptic Feedback Damper

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