AIgo Notes

Home›Public Notes›Note details›Quiz

Quiz for:

An eel-like robot based on a dielectric elastomer

Question 21

Which of the following is NOT a potential application area for dielectric elastomers mentioned in the article?

A.Soft robots

B.Loudspeakers

C.Thermal insulation panels

D.Flexible sensors

Question 1

What is a key advantage of eel-like robots compared to other types of underwater robots?

A.Low cost of production

B.Lowest energy consumption per unit distance

C.High surface roughness

D.Inflexible movement in tight spaces

Question 2

What are dielectric elastomers (DEs)?

A.Metallic magnetic materials

B.Smart soft polymers responsive to electric field

C.Rigid plastics

D.Thermal conductors

Question 3

In the design described, what main function does the DE perform in the robot?

A.Provides buoyancy to keep the robot afloat

B.Acts as a soft actuator enabling flexible movement

C.Stores electrical energy for long-term use

D.Serves as a structural skeleton

Question 4

What is the typical operational mode for a DE in biorobotic applications?

A.Drive mode and energy harvesting mode

B.Thermal transfer mode

C.Optical sensing mode

D.Chemical reaction mode

Question 5

Which fish locomotion mode does the eel-like robot replicate?

A.Median and paired fin (MPF) mode

B.Body and/or caudal fin (BCF) mode

C.Rotational tail flapping

D.Jet propulsion

Question 6

In designing the bionic eel robot, why is low weight emphasized for the actuator materials?

A.To reduce total cost

B.To prevent damage from electric shorts

C.To improve propulsion efficiency in water

D.To improve heat dissipation

Question 7

What is the main reason for using a tube drive module with detachable connections?

A.To allow for interchangeable batteries

B.To enable easy replacement of damaged parts

C.To change robot color

D.To store more sensors

Question 8

According to the experiment, at which frequency does the eel-like robot achieve maximum propulsion speed?

A.0.5 Hz

B.1.5 Hz

C.4.0 Hz

D.10.0 Hz

Question 9

What is the measured maximum propulsion speed of the prototype eel-like robot?

A.15.6 mm/s

B.27.0 mm/s

C.43.7 mm/s

D.60.0 mm/s

Question 10

Compared to the prototype by Shintake, the maximum speed of this eel-like robot is:

A.Lower and less efficient

B.Equal in speed but less efficient

C.Higher and more efficient

D.Higher but less efficient

Question 11

What liquid was used in the swimming experiments instead of water?

A.Silicone oil

B.Mercury

C.Fluorinert insulating liquid

D.Ethanol

Question 12

The swim number for most fish tends to be around:

A.0.2

B.0.4

C.0.6

D.1.0

Question 13

What is meant by the 'swimming number' in robot performance analysis?

A.Number of strokes per minute

B.Ratio of robot's advancing body length to distance pushed by tail fin

C.Amount of energy used in a swim

D.Number of oscillations per second

Question 14

What is a notable difference in swimming shape between the prototype robot and real fish?

A.Robot's tail amplitude is much higher than its head

B.Robot's head amplitude is larger than the tail's

C.Robot moves entirely straight

D.Robot swims in circles

Question 15

What is cited as a key advantage of soft, compliant eel-like robots?

A.Increased risk of environmental damage

B.Ability to minimize risk of damaging environment or fragile objects

C.Better performance in high temperatures

D.Simpler control electronics

Question 16

A main challenge identified for the eel robot at high frequencies is:

A.Loss of power supply

B.Decrease in propulsion speed due to fluid intrusion and weight increase

C.Overheating of DE materials

D.Uncontrolled tail oscillation

Question 17

How can the robot swimming performance be further improved, according to the article’s discussion?

A.Designing a smoother tail fin only

B.Increasing voltage beyond safety limits

C.Optimizing response frequency, sealing robot, adjusting mass and rigidity distribution

D.Using more heavy materials

Question 18

Why did the robot's propulsion speed decrease at higher frequencies?

A.Electrical faults in DE actuators

B.Robotic joints stiffened up

C.Intrusion of insulating fluid increasing the robot's weight

D.Reduced battery power

Question 19

What factor is proposed to be adjusted to suppress excess head vibration and make swimming more fish-like?

A.Color of the head

B.Distribution of mass and rigidity

C.Voltage applied to tail

D.Type of insulating liquid used

Question 20

What was the main finding regarding the swimming motion of the eel-like robot?

A.It cannot reach a steady S-type motion

B.It achieves S-type angle swinging motion

C.It can only move straight ahead

D.Its motion is random and unstable