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Fabrication and Characterization of Array Tactile Actuator Based on Cellulose Acetate
Hyun-Chan Kim(김현찬),Sungryl Yun(윤성률),Hyun-U Ko(고현우),Jaehwan Kim(김재환) Korean Society for Precision Engineering 2015 한국정밀공학회지 Vol.32 No.8
This paper reports the enhanced fabrication and characterization of a 3 × 3 array tactile actuator composed of cellulose acetate. The array tactile actuator, with dimensions of 15 × 15 × 1 ㎣, consists of 9 pillar-supported cells made from a cellulose-acetate molding. The fabrication process and performance test along with the results for the suggested actuator are explained. To improve the cell-array fabrication, a laser cut was adopted after the molding process. The displacement of the unit cell increased the input voltage and frequency. Various top masses are added onto the actuator to mimic the touch force, and the acceleration of the actuator is measured under actuation. When 2 kV is applied to the actuator, the maximum acceleration is 0.64 g, which is above the vibrotactile threshold. The actuation mechanism is associated with the electrostatic force between the top and bottom electrodes.