Electro-ionic soft actuators have the advantages of being possible to drive at low voltage and to operate in the air by using ionic liquid. However, they have a disadvantage of slow response. This paper proposes to accelerate electro-ionic soft actuators by feedforward control. Feedforward control can automatically generate online pulse-shaped input signals from any reference signals and is easy to implement. The experimental results show that the feedforward control can automatically generate control inputs for any references and achieve 2 times faster than the no-control case. In addition, it was found that the control performance was significantly degraded when a voltage limit was set to protect the actuator.
a low temperature fast synthetic strategy is adopted for directly growing MnBTC MOFs on conductive Ti3C2Tx MXene surface to achieve a smart hybrid conductive and hierarchical porous structure Ti3C2Tx MnBTC materials. Then, a flexible actuator membrane is fabricated by sandwich layer by layer structure with PEDOT:PSS embedding mobile ionic liquid (EMIM-BF4) and used for electroactive artificial muscles. The newly developed actuator demonstrates excellent actuation performance including highly bending displacement (12.5 mm) and ultrafast response time (0.77 s) under a low driving voltage (0.5V), along with wide frequency response (0.1 to 10 Hz) and excellent long-term durability (12 hr, 98% retention).
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