- Mar 2022
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www.scienceintheclassroom.org www.scienceintheclassroom.org
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In general, robots with smaller lengths have higher resonant frequencies and faster relative speeds. The relationships between driving frequency and relative speed for robots with lengths of 10, 15, 20, 25, and 30 mm are shown in Fig. 3C driven by a peak-to-peak voltage of 200 V to achieve measured maximum speeds of 20 BL/s (20 cm/s), 8 BL/s (12 cm/s), 4.05 BL/s (8.1 cm/s), 2.4 BL/s (6 cm/s), and 1.33 BL/s (4 cm/s), respectively
The author concluded from the experimental data that there is a direct relationship between driving frequency, body length, and speed. Shorter bodies and greater frequency yields faster speeds while longer bodies and lesser frequency yields slower speeds.
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similar to many running animals (36)
Dickinson et al found that most organisms (bi-pedal, multi-legged) use similar energy mechanisms for movement. In this article, our authors use piezoelectric material to mimic those movement patterns.
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unimorph piezoelectric structure
Piezoelectric materials undergo a shape change when voltage is applied across them. A piezoelectric unimorph is a thin and long microstructure that flexes when voltage is applied to it. In this paper, the properties of the piezoelectric material are used to create forward movement of the robot.
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fault-tolerant behavior
The ability to continue operating despite the failure of one or more components
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fail-safe
Revert to a safe state in the event of failure
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Paratarsotomus macropalpis
Mite species native to Southern California. Discovered to be worlds fastest terrestrial animal and passed the Australian Tiger Beetle as the previous record holder.
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- Feb 2022
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www.scienceintheclassroom.org www.scienceintheclassroom.org
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vertical spring-damper
a spring that absorbs up and down movement
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torsional spring-damper
a spring that absorbs rotational movement
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