Haptic Display Responsive to Touch Driven by Soft Actuator and Soft Sensor

Phung, Hoa; Hoang, Phi Tien; Jung, Hosang; Nguyen, Tien Dat; Nguyen, Canh Toan; Choi, Hyouk Ryeol

doi:10.1109/tmech.2020.3041225

Cited by 18 publications

(10 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

Section: Introductionmentioning

confidence: 99%

“…In particular, the DEA can be used to sense the deformations impressed by a user, and provide a vibrotactile stimulus and a superposed sound feedback. Despite their simplicity, these case studies demonstrate that DEA multifunctionality might be used in the future to develop compact lightweight multi-modal interfaces capable of collocated audiotactile feedback, [29][30][31][32] or buttons with programmable audio and tactile click feedback. [33] The multi-frequency, multi-mode principle proposed here leverages and takes advantage of some general features of DEAs, such as surface-distributed actuation which allows exciting different deformation modes of the same membrane via a single input.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A Multi‐Mode, Multi‐Frequency Dielectric Elastomer Actuator

Gratz‐Kelly

Rizzello

Fontana

et al. 2022

Adv Funct Materials

View full text Add to dashboard Cite

This paper presents a principle to develop multi‐function dielectric elastomer actuators (DEAs) that can concurrently accomplish linear actuation and sound generation through a single electrical input. A centimeter‐scale cone‐shaped DEA is fabricated using silicone‐based dielectric and electrodes. Measurements of the vibro‐acoustic response reveal that the pumping deformation of the DEA contributes to a negligible extent in the sound generation, which is hence ascribable to higher order structural modes whose frequency pass‐band is highly uncoupled from that of the pumping mode. Exciting the DEA with a multi‐chromatic input voltage allows achieving strokes close to 1 mm or blocking forces over 0.5 N, while simultaneously generating sound pressure levels over 60 dB, regardless of possible forces and/or mechanical constraints on the DEA pumping motion. The ability of the DEA to concurrently generate linear actuation and sound is demonstrated via proof‐of‐concept tests: the DEA can reproduce music, while at the same time generating a deformation pulse or lifting a load comparable with its own blocking force. Furthermore, measuring the current generated by the DEA allows detecting deformations impressed by the exterior and use the DEA as an active audio‐tactile interface, which produces a combined vibro‐acoustic stimulus in response to a user's touch.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Multi‐Mode, Multi‐Frequency Dielectric Elastomer Actuator

Gratz‐Kelly

Rizzello

Fontana

et al. 2022

Adv Funct Materials

View full text Add to dashboard Cite

show abstract

“…However, thermal feedback is slow in response, and developing electric feedback requires stimulation with a microcurrent, making wide acceptance challenging. Human body signals can be detected using various signals such as EMG, [30,57] temperature, [30] bending, [42,59] and pressure [30,45,47] signals. Surface EMG signals are highly susceptible to noise and necessitate the use of machine learning algorithms to indirectly recognize them, resulting in a bulky and expensive interface.…”

Section: Comparison and Analysismentioning

confidence: 99%

“…[39][40][41] However, when the precise sensing ability of the sensing materials is solely focused on, the constructed device is often an open-loop system, which lacks a feedback mechanism for users to utilize their intelligence and experience in a dynamic environment. To provide realistic feedback to the user, various actuators have been deployed at the interaction interface, [42][43][44] including dielectric elastomer actuators, [45][46][47][48] pneumatic elastomer actuators, [45,[49][50][51] electromagnetic actuators, [52][53][54][55][56] thermal-tactile actuators, [57] electro-tactile actuators, [58,59] and so on. Existing flexible wearable interactive interfaces can acquire signals from particular body parts.…”

Section: Introductionmentioning

confidence: 99%

A Flexible Bidirectional Interface with Integrated Multimodal Sensing and Haptic Feedback for Closed‐Loop Human–Machine Interaction

Feng,

Lei,

Wang

et al. 2023

Advanced Intelligent Systems

View full text Add to dashboard Cite

Human–machine interaction (HMI) establishes an interconnected bridge between humans and robots and plays a significant role in industry and medical fields. However, the conventional interface is bulky and rigid with a single function. It lacks feedback information to be provided to the user, limiting its application scenarios and the ability to complete complex tasks in a dynamic environment. Herein, a flexible bidirectional (FBD) interface with integrated multimodal sensing and haptic feedback and the development of an FBD‐based closed‐loop HMI platform are presented. The proposed FBD interface offers programmable haptic feedback through a coin vibration motor array to endow the user with better performance in missions. The multimodal sensing array can perceive signals of joint movement and the pressure imposed on the skin. In addition, the FBD interface exhibits significant advantages of flexibility and a compact structure. The experimental tests verify that the multimodal sensing module can accurately perceive various static and dynamic movements of a human. Furthermore, the actuation module can provide diverse haptic vibrations to convey different information to the user. Moreover, successful applications in the scenarios of bilateral robotic teleoperation and assistance of disabled people indicate great potential of the FBD interface for broad applications.

show abstract

“…Thresholds in steering control signals may be caused by lash (or free play) in the steering system, by limitations in human perception (sensory thresholds), and by impedances associated to motor response due to the viscoelasticity of the muscles [14], [15]. These thresholds can be absolute (such as those in visual perception [16]) or differential (Weber's Law as an example [17]).…”

Section: Introductionmentioning

confidence: 99%

Mitigating Threshold Effects in Human Control by Stochastic Resonance With Fractional Colored Noise

Martínez-García

Zhang

Wang

2022

IEEE/ASME Trans. Mechatron.

View full text Add to dashboard Cite

In industrial applications, mechanical and physiological thresholds may limit the capability of human manipulating machine via control devices, such as joysticks and steering wheels. These thresholds can result in loss of information in the control signals that are kept below the threshold of detection of the device or the human operator. One approach to mitigate these effects is stochastic resonance, by injecting additive noise into a signal to raise its energy content over the threshold of detection. Though this noise partially corrupts the signal, it can increase the detectability of the signal by the control device. This paper provides, for the first time, research towards using stochastic resonance to improve human performance in control tasks. In particular, it shows that using adaptive colored noise can improve the detectability of the steering control signals recorded from human participants. The approach converts a signal processing task to an optimization problem, where particle swarm optimization is employed to obtain the optimal color (or spectral exponent) of the injected additive noise, generated through an intelligent technique with fractional order filters. The results have shown that the proposed method improves the detectability of sub-threshold steering control signals. This method can be widely applicable to other industrial domains, such as energy harvesting and enhancing sensory perception.

show abstract

Haptic Display Responsive to Touch Driven by Soft Actuator and Soft Sensor

Cited by 18 publications

References 32 publications

A Multi‐Mode, Multi‐Frequency Dielectric Elastomer Actuator

A Multi‐Mode, Multi‐Frequency Dielectric Elastomer Actuator

A Flexible Bidirectional Interface with Integrated Multimodal Sensing and Haptic Feedback for Closed‐Loop Human–Machine Interaction

Mitigating Threshold Effects in Human Control by Stochastic Resonance With Fractional Colored Noise

Contact Info

Product

Resources

About