Effects of actuator-substrate ratio on hydrodynamic and propulsion performances of underwater oscillating flexible structure actuated by macro fiber composites

Lou, Junqiang; Gu, Ting; Chen, Tehuan; Yang, Yiling; Xu, Chao; Wei, Yanding; Cui, Yuguo

doi:10.1016/j.ymssp.2022.108824

Cited by 16 publications

(3 citation statements)

References 44 publications

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“…U = U 0 sinωt (20) where E j is the elastic modulus of adhesive layer and σ j is the Poisson ratio. U is the external harmonic alternating voltage and U 0 is its valid value, ω is voltage frequency.…”

Section: Appendix B Sound Pressure Of Piezoelectric Actuatormentioning

confidence: 99%

“…Deng and Avadhanula [18] produced a cm-level miniature robotic cowfish that can complete the underwater propulsion with the synergistic action of its chest and tail fins based on the lead zirconate titanate actuators, which is suitable for microbial sensing and pipeline exploration tasks. Hu et al [19,20] proposed a flexible miniature underwater vehicle using piezoelectric macro fiber composite as the main driving component, and evaluated the diverse propulsion indexes of the prototype. Zhao et al [21] designed a semiopen robotic fish with double tail fins driven by a piezoelectric cantilever beam with a mass of only 1.93 g and a maximum swimming speed of 4.5 cm s −1 , featuring high energy density and low driving voltage.…”

Section: Introductionmentioning

confidence: 99%

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A small-scale swimmer actuated by acoustic radiation force

Liu,

Wang,

et al. 2023

Smart Mater. Struct.

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A small-scale swimmer based on a piezoelectric actuator is proposed in this work, which could serve as the thruster for a minitype underwater robot. The out-of-plane stretching vibration mode in the thickness direction of the piezoelectric actuator is selected as the operating mode. Acoustic radiation propultion is generated due to the difference in acoustic impedance between solid and liquid media, then the opposite acoustic driving force makes the swimmer move forward. The vibration modes of piezoelectric actuator in dry and wet modals are compared through the finite element simulation, and verified by mechanical vibration characteristic test. Then a prototype with the size of Φ 37 mm × 45 mm is fabricated. The underwater performance shows that its linear speed achieves 33.93 mm s−1 under the voltage of 160 Vp–p with the frequency of 900 Hz and has a capacity of carrying 20 g loads, which confirms the feasibility of the proposed underwater driving method.

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Section: Appendix B Sound Pressure Of Piezoelectric Actuatormentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A small-scale swimmer actuated by acoustic radiation force

Liu,

Wang,

et al. 2023

Smart Mater. Struct.

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“…The swimming mode of penguins is the hydrofoil propulsion, which is based on a pair of flapping wings that can actively control the angle of attack (AoA). Compared with the oscillating fin propulsion which is an intermittent drag-based propulsion mode [1]- [3], the lift-based hydrofoil propulsion generates thrusts in the entire wing beat and has higher propulsion efficiency [4], [5].…”

Section: Introductionmentioning

confidence: 99%

Design of a 1:1 Scale Penguin-Like Robot with Effective Flexible Wings

Shen,

Ding,

Chen

et al. 2023

2023 IEEE 19th International Conference on Automation Science and Engineering (CASE)

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Penguins are excellent swimmers benefiting from their streamlined body and agile wings. In order to realize such swimming abilities, a penguin-like robot at 1:1 scale was designed, mainly consisting of a streamlined body shell referring to the structure and size of real penguins, a pair of active wings, and a wing driving mechanism that can achieve flapping, feathering and pitch of the wings with a total of five degrees of freedom. The kinematic characteristics of the wings conforms to the anatomical conclusion. In addition, the bending deformation was measured over a dead wing specimen, and the flexural stiffness was calculated. Based on the results, a two-joint flexible wing was fabricated, which can undergo passive deformation during flapping. The performance of the fabricated wing is verified by water tunnel test. The results show that the flexible wing can achieve larger thrust forces and sideway forces, which indicate potential agile motion of the penguin-mimetic robot.

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High Performance KNN‐Based Macro Fiber Composites for Human Motion Monitoring Applications

Zhu,

Huang,

Zhou

et al. 2024

Small

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Piezoelectric materials are increasingly used in portable smart electronics and Internet of Things sensors. Among them, piezoelectric macro fiber composites (MFCs) have attracted much attention due to their architectural simplicity, scalability, and high‐power density. However, most MFCs currently use toxic lead‐based piezoelectric materials, hindering their applications for bio‐friendly intelligent electronics. Here, a lightweight, thin, and high‐performance lead‐free MFC for human motion monitoring is developed using multilevel structure engineered (K,Na)NbO3‐based ceramics as eco‐friendly piezoelectric matrix based on delicate simulation analysis. The variation of the effective electric field and piezo‐potential inside the KNN‐based MFC during polarization and under different stress distributions is analyzed by using the finite element analysis method. The electrical output signals of the KNN‐based MFC are tested under different deformation modes, achieving high output voltage (≈25 V), as well as high output current (≈25 µA) and instantaneous output power density of 80.42 µW cm−2. When the MFC is attached to the human body, it can sensitively convert even tiny body motion into a noticeable electrical response, with remarkable motion monitoring capabilities. This research provides a fundamental methodology for the development of lead‐free MFCs, as well as an alternative material for next‐generation smart sensing devices.

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Effects of actuator-substrate ratio on hydrodynamic and propulsion performances of underwater oscillating flexible structure actuated by macro fiber composites

Cited by 16 publications

References 44 publications

A small-scale swimmer actuated by acoustic radiation force

A small-scale swimmer actuated by acoustic radiation force

Design of a 1:1 Scale Penguin-Like Robot with Effective Flexible Wings

High Performance KNN‐Based Macro Fiber Composites for Human Motion Monitoring Applications

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