• Title/Summary/Keyword: Electrostrictive Polymer

Search Result 10, Processing Time 0.064 seconds

The Modeling and Adaptive fuzzy control of Electrostrictive Polymer for endoscopic microcapsule (체내이동형 마이크로 캡술형 내시경 로봇을 위한 Electrostrictive Polymer의 모델링 및 Adaptive fuzzy 알고리듬 개발)

  • Hwang, Kyo-Il;Kim, Hun-Mo;Choi, Hyouk-Yeol;Nam, Jae-Do;Jeon, Jae-Wook
    • Proceedings of the KSME Conference
    • /
    • 2001.11a
    • /
    • pp.716-722
    • /
    • 2001
  • In this paper, the modeling and control of electrostrictive polymer is introduced for endoscopic microcapsule. The endoscopic microcapsule works in the body, so the material of robot must be no harmful to the body. The electrostrictive polymer satisfies this condition. The modeling and control of endoscope microcapsule must be processed. So the modeling and control of electrostrictive was processed preferentially. The electrostrictive polymer is so flexible that we considered the electrostrictive polymer as flexible membrane. The dynamic equation of flexible membrane is time variant in electrostrictive polymer. It is the reason that the elastic modulus of electrostrictive polymer is very small and changes as deformation of electrostrictive polymer. The control algorithm must overcome these characteristics. So the algorithm of adaptive fuzzy control was used to control. In this paper, we introduced the dynamic modeling and control of electrostrictive polymer. And its deformation is introduced.

  • PDF

The Analysis on the Deformation of Electrostrictive Polymer Film with respect to Time under Constant Voltage

  • Park, Kyung-Chul;Yun, Ji-Won;Jeon, Jae-Wook;Park, Hyoukryueol;Kim, Hunmo;Nam, Jae-Do
    • 제어로봇시스템학회:학술대회논문집
    • /
    • 2001.10a
    • /
    • pp.46.5-46
    • /
    • 2001
  • Electrostrictive polymer is deformed by electric force generated by electric field built by high voltage. When high voltage is applied to the electrostrictive polymer film in which the electrodes such as conductive grease or carbon powder are installed, it expands in the direction of area. Because electrostrictive polymer is incompressible and electric force is applied to it in the direction of thickness. Electrostrictive polymer film in which electrodes are installed, functions as a parallel-plate capacitor. Therefore anode and cathode charges are piled up or both electrodes and there exists attractive force that functions as pressure in the direction of thickness. So the thickness of electrostrictive polymer becomes thicker ...

  • PDF

Development of Micro-Nano Plotting Mechanism using Electrostrictive Polymer (Electrostrictive Polymer를 이용한 마이크로-나노 플로터 메커니즘 개발)

  • 류경주;김훈모
    • Proceedings of the Korean Society of Precision Engineering Conference
    • /
    • 2003.06a
    • /
    • pp.656-659
    • /
    • 2003
  • Although Hereafter a mass production will claim for patterning nano sized thickness or line in micro-nano industry. existent lithography fabrication has many usable fields, it has complex fabrication steps, expensive values and row work rates. Development of Dip-pen type nano plotter using polymer actuator can construct row cost mass production system because it will change existent lithography fabrication more simple and easy.

  • PDF

Compliant Micro Actuator made from Dielectric Polymer

  • Sunghwi Cho;Sungmoo Ryew;Jeon, Jae-Wook;Kim, Hunmo;Nam, Jae-Do;Park, Hyoukryeol;Ryutaro Maeda
    • 제어로봇시스템학회:학술대회논문집
    • /
    • 2001.10a
    • /
    • pp.103.2-103
    • /
    • 2001
  • In this paper, we discusses compliant actuators those are made of electrostrictive polymer. Electrostrictive polymer actuators(EPAs) are based on the deformation of dielectric elastomer polymer in the presence of an electric field. We address actual design and fabrication method of an actuator using the electrostrictive polymer. We have developed primitive prototypes of the actuator using elastic restoring force. And they actuators have 1 to 3 DOF, 1 DOF actuators are simple linear actuators and 3 DOF actuator has linear actuation and steering capability. They are simple in structure with lightweight, high trust, force and large stroke. Basic design principles and experimental procedures for confirming their performance will be introduced.

  • PDF

A Study of Electrostrictive Polymer(EP) Actuator Using Dielectric Elastomers (유전성 탄성체를 이용한 전기변형 고분자 구동체의 특성 연구)

  • 황성덕;이경섭;김홍경;최혁렬;김훈모;전재욱;이영관;남재도
    • Polymer(Korea)
    • /
    • v.26 no.1
    • /
    • pp.113-120
    • /
    • 2002
  • Electrostriction is the phenomenon that a material is strained due to Maxwell stress developed by the applied voltage. In many electrostrictive materials, especially polymeric elastomers can produce large deformation and force due to their low elastic modulus. In this study, polyurethanes and acrylic rubber with compliant electrodes were used as electrostrictive polymer(EP) actuator. Actuation characteristics of the EP actuators with different physical properties of dynamic modulus and dynamic dielectiric constant were analyzed under AC field. The classical laminate theory was also used to simulate the actuation process in relation to the geometry and the physical properties of the actuators.

Functional Prototype Development (기능성 시작품 개발)

  • 정해도;임용관;조진구;정은수;양동열
    • Proceedings of the Korean Society of Precision Engineering Conference
    • /
    • 2000.11a
    • /
    • pp.755-758
    • /
    • 2000
  • Rapid prototyping is one of the most important technology for 21th century industry. To overcome the limitation of the material and function, Functional Prototype Development(FPD) concept is newly proposed. Wide function is necessary such as mechanical, optical, chemical and electrical property in order to solve broad requirements of the industry. The process of FPD has more than two conventional processes based on fusion technology and the FPD system is integrated with the interdisciplinary, interfacing and intelligent concepts. This paper shows some representative achievements such as optic coloring prototypes, electric multi layer printed circuit broad(MLB) and MEMS using electrostrictive polymer. Finally, we confirmed that FPD has a great possibility which can be applied in broad industry and will be a powerful tool in near future.

  • PDF

Characterization of Electrostrictive Polyurethane Films for Micro-Actuators (전기왜곡성 폴리우레탄 엑츄에이터의 특성 평가)

  • Jeong, Eun-Soo;Park, Han-Soo;Jeong, Hae-Do;Jo, Nam-Ju;Jae, Woo-Seong
    • Journal of the Korean Society for Precision Engineering
    • /
    • v.19 no.4
    • /
    • pp.161-167
    • /
    • 2002
  • For the purpose of applying to micro-actuator, thermal properties and displacement of electrostrictive polyurethane(PU) elastomers have been measured. In order to understand an effect of PU component, crosslinking agent are controlled by 0.5 wt% and 1 wt%. DMPA and anther chain extenders were used. PU sample that chain extenders are DMPA is added NaOH for comprehension of effect of ionic groups. The deposited electrode sire on PU films is equal to acrylic holder size when the displacement was measured. Dynamic response according to frequency, displacement and recovery time according to PU thickness were measured. 1 wt% crosslinking agent contents PU samples have higher displacement and lower recovery time than 0.5 wt% crosslinking agent contents PU. If the PU thickness is increased, the actuating voltage for generating of same displacement is increased, too.

Fabrication of an Electrostrictive Fluorinated Terpolymer Sheet Applicable to Artificial Muscle Systems (인공 근육에 응용 가능한 전기변형 불화 고분자 박막의 제작)

  • Kim, Sung-Jin
    • Journal of the Korean Vacuum Society
    • /
    • v.20 no.4
    • /
    • pp.276-279
    • /
    • 2011
  • Polymer electrostrictor materials can exhibit high electroactive strain and hold increasing promise for a variety of actuator applications. The size of available actuators has been limited, however, by the solution-based casting and annealing process generally required to prepare electrostrictor actuator materials. We report on a high throughput melt and stretch extrusion process capable of creating large sheets of an electrostructive terpolymer, poly (vinylidene fluoride-trifluoroethylene-1, 1-chlorofluoroethlene) while producing a suitable crystallinity and crystal phase for high strain electrostrictor performance such as artificial muscle systems.

A Study on Multi-Vehicle Control of Electro Active Polymer Actuator based on Embedded System using Adaptive Fuzzy Controller (Adaptive Fuzzy 제어기를 이용한 Embedded 시스템 기반의 기능성 고분자 구동체의 이중제어에 관한 연구)

  • 김태형;김훈모
    • Proceedings of the Korean Society of Precision Engineering Conference
    • /
    • 1997.10a
    • /
    • pp.307-310
    • /
    • 1997
  • In case of environment requiring safety such as human body and requiring flexible shape, a conventional mechanical actuator system does not satisfy requirement. Therefore, in order to solve this problem, a research of various smart material such as EAP (Electro Active Polymer), EAC (Electro Active Ceramic) and SMA (Shape Memory Alloy) is in progress. Recently, the highest preferring material among various smart material is EP (Electrostictive Polymer), because it has very fast response time, poerful force and large displacement. The previous researches have been studied properties of polymer and simple control, but present researches are studied a polymer actuator. An EP (Electostrictive Polymer) actuator has properties which change variably as shape and environmental condition. Therefore, in order to coincide with a user's purpose, it is important not only to decide a shape of actuator and mechanical design but also to investigate a efficient controller. In this paper, we constructed the control logic with an adaptive fuvy algorithm which depends on the physical properties of EP that has a dielectric constant depending on time.

  • PDF

The Control of an Electrostrictive Polymer Actuator by Using Neural Network

  • Youn, Ji-Won;Jeon, Jae-Wook;Nam, Jae-Do;Park, Hyoukryeol;Kim, Hunmo
    • 제어로봇시스템학회:학술대회논문집
    • /
    • 2002.10a
    • /
    • pp.120.4-120
    • /
    • 2002
  • $\textbullet$ In order to operate EP actuator, high voltage is applied to that. $\textbullet$ Our previous control algorithm for an EP actuator was PI method with constant gain. $\textbullet$ But this Control method is limitation such as rising time, steady-state error, and settling time. $\textbullet$ A neural network algorithm is proposed for improvement of performance. $\textbullet$ To do this, neural network algorithm changes the gain of PI control. $\textbullet$ In order to efficient drive EP actuator, the gain is changed at some point. $\textbullet$ Neural network method improve the performance of operation.

  • PDF