Design optimization of EAP-based haptic surfaces

Stubning, Tobias; Dénes, István; Beruscha, Frank

doi:10.1109/icd.2018.8514652

Cited by 3 publications

(5 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In this study, a haptic interface equipped with transparent PVDF actuators is introduced. In contrast to the work conducted by Stubning et al in this study, the actuators are positioned beneath a transparent plastic plate [26]. Moreover, unlike the approach of using a stack of actuators, this study accomplishes the goal of achieving accurate localized haptic feedback using only single actuators.…”

Section: Discussionmentioning

confidence: 93%

“…In another work accomplished by Stubning et al, a design procedure for a transparent EAP-stack actuator with multiple layers was introduced. However, neither of those actuators were implemented on a display interface [26]. Additionally, the multilayer structure of the EAP-stack actuator may result in decreased transparency and therefore lower visual quality of the display.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Transparent Localized Haptics: Utilization of PVDF-Type Piezoelectric Actuators on Touch-Displays

Ege¹,

Birbilen²,

Balıkçı³

2023

Preprint

View full text Add to dashboard Cite

Generating localized haptic feedback on touch displays has been a challenge in recent years. In this study, we introduce a haptic interface using transparent thin-film PVDF actuators to address this issue. The transparency feature allows for mounting the actuators at any location beneath the display, enabling localized haptic feedback as the generated vibration is primarily evident on the mounting area. Two different configurations are designed, simulated and prepared to explore the effectiveness of the proposed approach. The first configuration is used to characterize the haptic interface. Modal and forced-vibration analysis are performed to identify important design characteristics based on human factor considerations. Subsequent 2AFC psychophysics experiments validate the characteristics. In the second configuration, eight actuators are attached to the touch surface in a 2x4 matrix formation and excited at different voltage amplitudes. Human experiments are conducted based on the results from corresponding forced-vibration analysis. The results show that subjects demonstrate an accuracy of 96% in identifying locations with haptic feedback when the actuators are excited with 232 Vpp. Overall, our study demonstrates the effectiveness of the haptic interface equipped with PVDF-type actuators in achieving localized haptic feedback on touch displays.

show abstract

Section: Discussionmentioning

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Transparent Localized Haptics: Utilization of PVDF-Type Piezoelectric Actuators on Touch-Displays

Ege¹,

Birbilen²,

Balıkçı³

2023

Preprint

View full text Add to dashboard Cite

show abstract

“…Matysek et al fabricated a 3 × 3 matrix array of multilayer dielectric elastomer actuators in their study [17]. In another work, conducted by Stubning et al, a design procedure for a transparent EAP-stack actuator with multiple layers was introduced [18]. However, neither of those actuators were implemented on a display interface.…”

Section: Introductionmentioning

confidence: 99%

“…For example, the amplitudes of the stimulus set are modified for 137 Hz:1.08 ×[17,22,29,38, 50, 65, 85, 110, 143] =[18,24,31,41, 54, 70, 92, 119, 154] …”

mentioning

confidence: 99%

Transparent Localized Haptics: Utilization of PVDF Actuators on Touch Displays

Ege

Balıkçı

2023

Actuators

View full text Add to dashboard Cite

Generating localized haptic feedback on touch displays has been a challenge in recent years. In this study, we introduce a haptic interface using transparent thin-film PVDF actuators to address this issue. The transparency feature can be used to mount the actuators at any location beneath the display, enabling localized haptic feedback as the generated vibration is primarily evident on the mounting area. Two different configurations are designed, simulated and prepared to explore the effectiveness of the proposed approach. The first configuration is used to characterize the haptic interface. Modal and forced-vibration analyses are performed to identify important design characteristics based on human factors. Subsequent 2AFC psychophysics experiments validate the characteristics. In the second configuration, eight actuators are attached to the touch surface in a 2 × 4 matrix formation and excited at different voltage amplitudes. Human experiments are conducted based on the results from corresponding forced-vibration analysis. The results show that subjects demonstrate an accuracy of 96% in identifying locations with haptic feedback when the actuators are excited with 232 Vpp. Overall, our study demonstrates the effectiveness of the proposed transparent haptic interface equipped with PVDF actuators in achieving localized haptic feedback on touch displays.

show abstract

“…In a second step, we propose a model-based approach to allow for a rational transducer design and an optimized fabrication process by relying on characteristic relationships that are affected by the increasing number of stacked EAP layers. In doing so, we build on our previous work where we deduced the thermal properties of stacked actuators from model considerations based on first principles [19]. Finally, we connect both approaches for optimized actuator configurations-thickness and number of stacked EAP layers-and discuss their interdependence.…”

Section: Introductionmentioning

confidence: 99%

Tuning electro-mechanical properties of EAP-based haptic actuators by adjusting layer thickness and number of stacked layers—a comparison

2021

Self Cite

View full text Add to dashboard Cite

In our fast-changing world, human-machine interfaces (HMIs) are of ever-increasing importance. Among the most ubiquitous examples are touchscreens that most people are familiar with from their smartphones. The quality of such an HMI can be improved by adding haptic feedback—an imitation of using mechanical buttons—to the touchscreen. Thin-film actuators on the basis of electro-mechanically active polymers (EAPs), with the electroactive material sandwiched between two compliant electrodes, offer a promising technology for haptic surfaces. In thin-film technology, the thickness and the number of stacked layers of the electroactive dielectric are key parameters for tuning a system. Therefore, we have experimentally investigated the influence of the thickness of a single EAP layer on the electrical and the electro-mechanical performance of the transducer. In order to achieve high electro-mechanical actuator outputs, we have employed relaxor-ferroelectric ter-fluoropolymers that can be screen-printed. By means of a model-based approach, we have also directly compared single- and multi-layer actuators, thus providing guidelines for optimized transducer configurations with respect to the system requirements of haptic applications for which the operation frequency is of particular importance.

show abstract

Design optimization of EAP-based haptic surfaces

Cited by 3 publications

References 5 publications

Transparent Localized Haptics: Utilization of PVDF-Type Piezoelectric Actuators on Touch-Displays

Transparent Localized Haptics: Utilization of PVDF-Type Piezoelectric Actuators on Touch-Displays

Transparent Localized Haptics: Utilization of PVDF Actuators on Touch Displays

Tuning electro-mechanical properties of EAP-based haptic actuators by adjusting layer thickness and number of stacked layers—a comparison

Contact Info

Product

Resources

About