Sample Solution

um, and laser sensor will record the displacement, and using time travel of the robot, speed can be calculated.

Critic

Article 5 – Jellyfish Robot
Methodology
One last application of IPMC that will be reviewed is jellyfish robot. Jellyfish is one of animal that moves by using its whole body. When the body contract it pushes water out of its body, allowing jellyfish to moves in one direction. Since jellyfish does not have any other body part to create force to move, it periodically contract its body to create thrust and move vertically. The locomotion of jellyfish is kind of similar to jet propulsion, the force is coming out from one opening, and pushes the body.

Experiment done by Oh I., and Yeom S., aims to compare the movement of jellyfish exposed to sinusoidal and bio-inspired signal. Bio-inspired signal is slightly different from sinusoidal signal. Bio-inspired signal is a periodic signal just like sinusoidal but based on the ratio of pulsating and recovery process of jellyfish body, in this case is 3:7. It believed that feeding bio-inspired signal to the robot might yield to a very similar and close movement of the robot to a real jellyfish.

IPMC will be used mostly for the body for the robot. Thermal treatment was done to the IPMC to get a desirable shape of jellyfish body parts. There are two main body parts that is produced with IPMC, one is legs, and another one is skirt. Both are manufactured from IPMC and have undergo a thermal process to shape it, and the for skirt part, they are using cellophane paper to cover the IPMC to prevent a water damage.

Similar to the experiment that has been done by other researchers, they also use displacement sensor to record a vertical displacement of the robot. The result is that they found bio-inspired signal that has been applied to the IPMC makes the movement of robot very similar to the real jellyfish, and also much larger displacement was achieved.