Control Electronics for Wearable Haptic Actuators

• Chloe-Erika Tabaco, Computer Engineering, University of Delaware

• Nathan Lazarus, Electrical & Computer Engineering, University of Delaware

In soft robotics, devices are made from polymers or silicon, allowing them to bend, stretch, and conform to delicate objects, which prevents damage to both the human body and the device itself. This is revolutionary for enabling users to gain tactile feedback from devices for entertainment or educational simulation. Additionally, soft robotics can aid in medical relief through vibration therapy and can be revolutionary in the biomedical domain. 

The purpose of this research is to develop a controlled electronic device using a previously developed vibrating haptic array based on soft robotic actuator technology. To accomplish this, we first design a prototype that integrates both LEDs and soft actuators within a single array. We fabricate the array on a printed circuit board (PCB) and test multiple types of motor drivers to determine optimal actuator response and control precision. The assembled device is then configured as an armband, with the programmable array allowing users to experience distinct vibrational feedback patterns. 

This approach enables investigation into the cost-effectiveness of flexible haptic technology for therapeutic applications. It facilitates further examination of alternative materials, such as advanced flexible PCBs and liquid metal-based conductors.

As a result, we continue to create more compact designs by minimizing the size of the PCB and optimizing the placement of the newly created haptic actuators. Further research could focus on simplifying the circuit or on developing even smaller actuators capable of more complex vibrational patterns.