scholarly journals Simulation Analysis of Bionic Robot Fish Based on MFC Materials

2019 ◽  
Vol 2019 ◽  
pp. 1-9 ◽  
Author(s):  
Chengguang Zhang
Keyword(s):  
Smart Materials ◽  
Electromechanical Coupling ◽  
Mechanical Load ◽  
Fiber Composite ◽  
Smart Material ◽  
Robotic Fish ◽  
Electromechanical Coupling Coefficient ◽  
Control Analysis ◽  
Underwater Robots ◽  
New Type

With the development of marine resources, research on underwater robots has received unprecedented attention. The discovery and application of new smart materials provide new ideas for the research of underwater robots, which can overcome the issues of traditional underwater robots and optimize their design. A macro fiber composite (MFC) is a new type of piezoelectric fiber composite that combines actuators and sensors. The material has excellent deflection, good flexibility, and a high electromechanical coupling coefficient. Bionic mechatronics design is an effective way to innovate mechatronics in the future and can significantly improve mechatronics system performance. As an important issue for the design of bionic mechatronics, it is necessary to make robots as soft as natural organisms to achieve similar biological movement with both higher efficiency and performance. Compared with traditional rigid robots, the design and control of a soft robotic fish are difficult because the coupling between the flexible structure and the surrounding environment should be considered, which is difficult to solve due to the large deformation and coupling dynamics. In this paper, an MFC smart material is applied as an actuator in the design of bionic robotic fish. Combined with the piezoelectric constitutive and elastic constitutive equations of the MFC material, the voltage-drive signal is converted to a mechanical load applied to the MFC actuator, which makes the MFC material deform and drives the movement of the robotic fish. The characteristics of caudal fin motion during the swimming process of the bionic robotic fish were analyzed by an acoustic-solid coupling analysis method. The motion control analysis of the bionic robotic fish was carried out by changing the applied driving signal. Through numerical analysis, a new type of soft robotic fish was designed, and the feasibility of using an MFC smart material for underwater bionic robotic fish actuators was verified. The new soft robotic fish was successfully developed to achieve high performance.

Fish-Like Self Propulsion Using Flexible Piezoelectric Composites

2012 ◽  
Author(s):  
Lejun Cen ◽  
Alper Erturk
Keyword(s):  
Smart Materials ◽  
Electromechanical Coupling ◽  
High Efficiency ◽  
Fiber Composite ◽  
Actuation Voltage ◽  
Robotic Fish ◽  
Circuit Board ◽  
Modeling Framework ◽  
Actuator Dynamics ◽  
Body Theory

The capacity of humankind to mimic fish-like locomotion for engineering applications depends mainly on the availability of suitable actuators. Researchers have recently focused on developing robotic fish using smart materials, particularly Ionic Polymer-Metal Composites (IPMCs), as a compliant, noise-free, and scalable alternative to conventional motor-based propulsion systems. In this paper, we investigate fish-like self propulsion using flexible bimorphs made of Macro-Fiber Composite (MFC) piezoelectric laminates. Similar to IPMCs, MFCs also exhibit high efficiency in size, energy consumption, and noise reduction. In addition, MFCs offer large dynamic forces in bending actuation, strong electromechanical coupling as well as both low-frequency and high-frequency performance capabilities. The experimental component of the presented work focuses on the characterization of an MFC bimorph propulsor for thrust generation in a quiescent fluid as well as the development of a preliminary robotic fish prototype incorporating a microcontroller and a printed-circuit-board (PCB) amplifier to generate high actuation voltage for battery-powered free locomotion. From the theoretical standpoint, a reliable modeling framework that couples the actuator dynamics, hydroelasticity, and fish locomotion theory is essential to both design and control of robotic fish. Therefore, a distributed-parameter electroelastic model with fluid effects and actuator dynamics is coupled with the elongated body theory. Both in-air and underwater experiments are performed to verify the incorporation of hydrodynamic effects in the linear actuation regime. For electroelastically nonlinear actuation levels, experimentally obtained underwater vibration response is coupled with the elongated body theory to predict the thrust output. Experiments are conducted to validate the electrohydroelastic modeling approach employed in this work and to characterize the performance of an MFC bimorph propulsor. Finally, a battery-powered preliminary robotic fish prototype is developed and tested in free locomotion.

scholarly journals Smart Material Electrohydrostatic Actuator for Intelligent Transportation Systems

2006 ◽  
Author(s):  
Michael J. Rupinsky ◽  
Marcelo J. Dapino
Keyword(s):  
Smart Materials ◽  
Intelligent Transportation Systems ◽  
Electromechanical Coupling ◽  
Weight Ratio ◽  
Intelligent Transportation ◽  
Transportation Systems ◽  
Smart Material ◽  
Maximum Pressure ◽  
Large Power ◽  
Smart Material Pump

Future intelligent transportation systems require actuation systems that are lightweight, compact and have a large power density. Due to their solid-state operation, fast frequency response, and high power-to-weight ratio, electrohydrostatic actuators based on smart materials are attractive as a replacement for conventional hydraulic actuators. This paper is focused on the development of a smart material pump for EHAs in which mechanical vibrations produced by a magnetostrictive terbiumiron-dysprosium alloy are rectified by means of diode-type mechanical reed valves. A maximum blocked pressure differential of 1100 psi is achieved with a power consumption of 84 W. A linear dynamic system model of the magnetostrictive pump is presented. The linear model quantifies the maximum pressure and electromechanical coupling of the magnetostrictive pump and facilitates the determination of system parameters from simple experimental measurements.

Gliding Robotic Fish and its Tail-Enabled Yaw Motion Stabilization Using Sliding Mode Control

2013 ◽  
Author(s):  
Feitian Zhang ◽  
Xiaobo Tan
Keyword(s):  
Energy Efficiency ◽  
Sliding Mode ◽  
Robotic Fish ◽  
Sliding Mode Controller ◽  
Lateral Motion ◽  
Underwater Robots ◽  
Underwater Gliders ◽  
New Type ◽  
Control Authority ◽  
Motion Stabilization

Gliding robotic fish is a new type of underwater robots that combines the energy-efficiency of underwater gliders and the high maneuverability of robotic fish. The tail fin of a gliding robotic fish provides the robot more control authority, especially for the lateral motion, compared with traditional underwater gliders. In this paper, the design and development of a gliding robotic fish prototype is first presented, followed by its dynamic model. We then focus on the problem of tail-enabled yaw stabilization during gliding, where a sliding mode controller is proposed. Both simulation and experimental results are demonstrated to validate the effectiveness of the proposed controller.

scholarly journals The Radial Electric Field Excited Circular Disk Piezoceramic Acoustic Resonator and Its Properties

Sensors ◽  
2021 ◽  
Vol 21 (2) ◽  
pp. 608
Author(s):  
Andrey Teplykh ◽  
Boris Zaitsev ◽  
Alexander Semyonov ◽  
Irina Borodina
Keyword(s):  
Electric Field ◽  
Electrical Impedance ◽  
Electromechanical Coupling ◽  
Surrounding Medium ◽  
Circular Disk ◽  
Radial Electric Field ◽  
Acoustic Resonator ◽  
Electromechanical Coupling Coefficient ◽  
Dimensional Finite Element ◽  
New Type

A new type of piezoceramic acoustic resonator in the form of a circular disk with a radial exciting electric field is presented. The advantage of this type of resonator is the localization of the electrodes at one end of the disk, which leaves the second end free for the contact of the piezoelectric material with the surrounding medium. This makes it possible to use such a resonator as a sensor base for analyzing the properties of this medium. The problem of exciting such a resonator by an electric field of a given frequency is solved using a two-dimensional finite element method. The method for solving the inverse problem for determining the characteristics of a piezomaterial from the broadband frequency dependence of the electrical impedance of a single resonator is proposed. The acoustic and electric field inside the resonator is calculated, and it is shown that this location of electrodes makes it possible to excite radial, flexural, and thickness extensional modes of disk oscillations. The dependences of the frequencies of parallel and series resonances, the quality factor, and the electromechanical coupling coefficient on the size of the electrodes and the gap between them are calculated.

scholarly journals Effects of Thermal Annealing on the Characteristics of High Frequency FBAR Devices

Coatings ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 397
Author(s):  
Yu-Chen Chang ◽  
Ying-Chung Chen ◽  
Bing-Rui Li ◽  
Wei-Che Shih ◽  
Jyun-Min Lin ◽  
...  
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Thermal Annealing ◽  
Electromechanical Coupling ◽  
Zno Thin Films ◽  
Electromechanical Coupling Coefficient ◽  
Back Side ◽  
Zno Thin Film ◽  
Frequency Responses ◽  
Sputtering System

In this study, piezoelectric zinc oxide (ZnO) thin film was deposited on the Pt/Ti/SiNx/Si substrate to construct the FBAR device. The Pt/Ti multilayers were deposited on SiNx/Si as the bottom electrode and the Al thin film was deposited on the ZnO piezoelectric layer as the top electrode by a DC sputtering system. The ZnO thin film was deposited onto the Pt thin film by a radio frequency (RF) magnetron sputtering system. The cavity on back side for acoustic reflection of the FBAR device was achieved by KOH solution and reactive ion etching (RIE) processes. The crystalline structures and surface morphologies of the films were analyzed by X-ray diffraction (XRD) and field emission scanning electron microscope (FE-SEM). The optimized as-deposited ZnO thin films with preferred (002)-orientation were obtained under the sputtering power of 80 W and sputtering pressure of 20 mTorr. The crystalline characteristics of ZnO thin films and the frequency responses of the FBAR devices can be improved by using the rapid thermal annealing (RTA) process. The optimized annealing temperature and annealing time are 400 °C and 10 min, respectively. Finally, the FBAR devices with structure of Al/ZnO/Pt/Ti/SiNx/Si were fabricated. The frequency responses showed that the return loss of the FBAR device with RTA annealing was improved from −24.07 to −34.66 dB, and the electromechanical coupling coefficient (kt2) was improved from 1.73% to 3.02% with the resonance frequency of around 3.4 GHz.

scholarly journals Smart Experience in Fashion Design: A Speculative Analysis of Smart Material Systems Applications

Arts ◽  
2018 ◽  
Vol 8 (1) ◽  
pp. 4
Author(s):  
Marinella Ferrara
Keyword(s):  
Smart Materials ◽  
Design Research ◽  
Design Thinking ◽  
Human Perception ◽  
Smart Material ◽  
Fashion Design ◽  
Material Systems ◽  
Limited Edition ◽  
Smart Material Systems ◽  
Design Scenario

During the last decade, smart materials and systems have increasingly impacted several niches, including ‘one-off/limited edition experimental fashion’. As the traditional boundaries between what is art and what was not supposed to be art are now turning into osmotic membranes, we will speculatively focus on how ‘smart material systems’ are highly contributing to outline a new creative landscape full of interesting and compelling issues. Introducing three different sub-niches of experimental fashion—multi-sensory dresses, empathic dresses, and bio-smart dresses—this article outlines the emergence of a new smart design scenario. Then, we critically discuss some of the implications of the developing research in terms of design thinking and design aesthetics. This paper aims to contribute to the topic of next design scenario, demonstrating how design research is increasingly affecting the extension of human perception, emotions, and the concept of ‘almost-living’ entities, projecting towards the redefinition of relationships with materials and objects.

Sb5+ Modified Phase Transition in (Li, Na, K)(Nb1-xSbx)O3 Piezoelectric Ceramics

2016 ◽  
Vol 848 ◽  
pp. 339-343
Author(s):  
Xiao Kun Zhao ◽  
Bo Ping Zhang ◽  
Lei Zhao ◽  
Li Feng Zhu
Keyword(s):  
Phase Transition ◽  
Phase Boundary ◽  
Coupling Coefficient ◽  
Electromechanical Coupling ◽  
Piezoelectric Coefficient ◽  
Electromechanical Coupling Coefficient ◽  
Second Phase ◽  
Phase Transition Temperatures ◽  
Two Peaks ◽  
Planar Mode

The modified behavior of the phase transition temperatures (TO-T and/or TC) between orthorhombic (O), tetragonal (T) and cubic (C) that caused by doping Sb5+ in (Li0.052Na0.493K0.455)(Nb1-xSbx)O3 (LNKNSx) ceramics was reported in the present investigation. The results show that differing from the insensitive TO-T to the Sb5+ content, TC splits into two peaks TCI and TCII when doping Sb5+. The decreased TCI by raising x may be ascribed to the Sb-rich grains and the settled TCII round 480 °C resulting from the Sb-lack ones. The enhanced piezoelectric coefficient d33 value of 263 pC/N and planar mode electromechanical coupling coefficient kp value of 42.5% at x=0.052 can be attributed to the polymorphic phase boundary (PPB) behavior with an appropriate ratio between T and O phases without any second phase.

Effects of Different Sintering Temperature on the Microstructure and Piezoelectric Properties of Pb(Nb2/3Zn1/3)x(Zr52Ti48)1-XO3 Ceramics

2014 ◽  
Vol 1061-1062 ◽  
pp. 83-86
Author(s):  
Hong Wu ◽  
De Yi Zheng
Keyword(s):  
Electrical Properties ◽  
Electromechanical Coupling ◽  
Piezoelectric Properties ◽  
Sintering Temperature ◽  
Electromechanical Coupling Coefficient ◽  
X Ray Diffraction ◽  
X Ray ◽  
Ceramic Samples ◽  
Xrd Patterns ◽  
The Relationship

In this paper, the effects of different sintering temperature on the microstructure and piezoelectric properties of Pb(Nb2/3Zn1/3)0.03(Zr52Ti48)0.97O3(PNZZT) ceramic samples were investigated. The Pb(Nb2/3Zn1/3)0.03(Zr52Ti48)0.97O3 ceramics materials was prepared by a conventional mixed oxide method. In the period of the experiment, the relationship between crystallographic phase and microstructure were analyzed by X-ray diffraction(XRD) and scanning electron microscopy(SEM) respectively. The XRD patterns shows that all of the ceramic samples are with a tetragonal perovskite structure. Along with sintering temperature increased and the x is 0.03, the grain size gradually become big. Through this experiment, it has been found that when the x is 0.03 and sintered at 1130°C for 2 h, the grains grow well, the grain-boundary intersection of the sample combined well and the porosity of the ceramics decreased, an excellent comprehensive electrical properties of the Pb(Nb2/3Zn1/3)0.03(Zr52Ti48)0.97O3 samples can be obtained. Its best electrical properties are as follows: dielectric constant (ε) is 1105, dielectric loss(tg) is 0.017, electromechanical coupling coefficient (Kp) is 0.287, piezoelectric constant(d33) is 150PC/N

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