• Proceedings of the Korea Information Processing Society Conference
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• 2014.11a
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• pp.913-916
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• 2014

본 논문의 수중로봇 도미(Domi) ver1.0는 관상어용 물고기 로봇 개발을 목표로 연구 개발되었다. 물고기 로봇은 머리, 1단, 2단 몸체와 꼬리부분과 2개의 구동 관절로 구성되어 있다. 물고기 로봇의 추력에 적합한 구동부 선정을 위하여 물고기 로봇 모델링과 유영 해석을 통하여 관절 구동부가 설계되었다. 또한 물고기 로봇의 유영알고리즘은 Lighthill 운동학 해석을 기초로 생체 모방의 유영 근사화 방법을 적용하였다. 설계된 물고기는 수동유영 및 자율운영모드로 동작된다. 수동유영모드는 RF 송수신에 의하여 구현된다. 본 설계된 물고기로봇 도미 ver1.0은 수중 현장시험 평가을 통하여 추력, 내구성, 방수성 등의 성능이 우수함을 확인하였다.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.15 no.8
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• pp.1756-1763
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• 2011

This paper was researched the straight cruise of fish robot according to biological mimic, and it was compared the proposed method which was considered up to 7th order components in fourier series of Liu's tail motion function with the approximate method which was used general sine function by simulation. If fish robot has a large number of links and if the length of tail link is long. The end rotary joint trajectory of tail motion function generally is different from sine function. Therefore The approximate method which expresses tail motion trajectories as fundamental component in fourier series has a problem. Through the computer simulation, the proposed method showed 10% excellent propulsion and velocity than the conventional method.

• Transactions of the Korean Society of Mechanical Engineers A
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• v.36 no.1
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• pp.1-7
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• 2012

This paper introduces the mechanical design, fabrication, and control of a biomimetic fish robot whose driving motions resemble a real fish's flexibility and movement. This robot uses two motors create flexible movement like that of a fish. Several schemes, such as neutral buoyancy, fast underwater swimming, and direction changes, are introduced. The tail of the fish robot is made of a polymer material for flexible movement. The interior of the tail contains a joint and a wire. A sine wave command was applied to the tail to produce motion resembling a real fish swimming, and a buoy control device was installed. The up and down motion of the robot fish was controlled using this device.

• ICROS
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• v.18 no.1
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• pp.20-25
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• 2012

자연계에 존재하는 생물체는 오랜 시간에 걸쳐 지구의 가혹한 환경에 적응하면서 다듬어져온 최적화된 작품이다. 이러한 동 식물의 생체 특징 모방은 기존 기술의 한계를 돌파하면서 가장 활발한 연구 분야로 자리 잡고 있다. 생체모방 로봇은 생체모방 기술의 한 분야로써 곤충, 새, 물고기, 그리고 여타 동물들을 연구해 생명체의 우수한 특성을 로봇기술에 접목함으로써 기존의 로봇 시스템이 극복하지 못했던 수많은 난제 해결에 도전중이다. 생체모방 로봇 기술의 최신 동향을 크게 세 줄기로 나누면 실용화, 생체분석법의 다양화, 모방대상의 다양화로 분류될 수 있다. 이 글에서는 이상에서 언급한 생체모방 로봇의 최신 동향에 대해서 소개한다.

• Journal of the KSME
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• v.52 no.4
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• pp.44-49
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• 2012

최근 육상자원의 한계로 해양 자원에 대한 관심이 높아짐에 따라 수중에서 자유자재로 운용할 수 있는 수중로봇의 경제적 가치가 부각되고 있으며, 특히 기술적 한계를 극복하기 위해 물고기나 수중생물을 모사한 생체모방형 수중로봇에 대한 연구가 활발해지고 있어 이를 소개하고자 한다.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.18 no.3
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• pp.510-518
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• 2014

In this study, in order to improve and optimize the performance of the turning mechanism for a fish robot in the fluid, we propose the tail joint trajectories using neural networks to mimic the CST(C-shape Sharp Turn) patterns of a real fish which is optimized in the natural environment. In order to mimic the CST patterns of a fish, we convert the sequential recording CST patterns into the coordinate data, and change the numerical coordinate data into a functions. We change the motion functions to the relative joint angles which is adapted to suit robot's shape and data. However, these relative joint trajectories obtained by the sequential recording of the carp have low-precision. It is difficult to apply to the control of a fish robot. Therefore, the relative joint trajectories are interpolated using neural networks with superior generalization ability and applied to the fish robot. we have found that the proposed method using neural networks is superior to ones using high-order polynomial equation through the computer simulations.

• KIPS Transactions on Software and Data Engineering
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• v.4 no.5
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• pp.219-224
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• 2015

In this paper, the designed fish robots DOMI ver1.0 is researched and development for aquarium underwater robot. The presented fish robot consists of the head, 1'st stage body, 2nd stage body and tail, which is connected two point driving joints. The model of the robot fish is analysis to maximize the momentum of the robot fish and the body of the robot is designed through the analysis of the biological fish swimming. Also, Lighthill was applied to the kinematics analysis of robot fish swimming algorithms, we are applied to the approximate method of the streamer model that utilizes techniques mimic the biological fish. The swimming robot has two operating mode such as manual and autonomous operation modes. In manual mode the fish robot is operated to using the RF transceiver, and in autonomous mode the robot is controlled by microprocessor board that is consist PSD sensor for the object recognition and avoidance. In order to the submerged and emerged, the robot has the bladder device in a head portion. The robot gravity center weight is transferred to a one-axis sliding and it is possible to the submerged and emerged of DOMI robot by the breath unit. It was verified by the performance test of this design robot DOMI ver1.0. It was confirmed that excellent performance, such as driving force, durability and water resistance through the underwater field test.

• Proceedings of the Korean Information Science Society Conference
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• 2012.06a
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• pp.274-275
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• 2012

생체모방로봇은 인간을 비롯하여 새, 곤충, 물고기 등 동물들의 기본구조, 행동원리 및 메커니즘을 모방한 로봇이다. 정찰, 수색, 테러진압 등 군사작전에서부터 인명구조까지 생체모방로봇은 인간의 눈과 발을 대신하여 인간이 접근할 수 없는 오염 지역을 면밀히 탐지하는 데에도 유용하리라 예상된다. 이와 같은 생체모방로봇이나 MAV 등을 실시간으로 원격에서 모니터링하고 제어할 수 있는 DAQ 시스템의 중요성이 커지고 있다. 본 논문에서는 생체모방로봇인 가오리를 원격 관제 센터에서 RF무선통신을 이용하여 안정적인 제어 및 모니터링이 가능한 DAQ(Data AcQuisition) 시스템을 제안한다.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.15 no.12
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• pp.2626-2631
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• 2011

CST(C-shape sharp turn) represented the motion whereby fish bend their tail quickly in a C-shape to achieve an emergent changing of its swimming direction on fish swimming. But there is not yet the general motion trajectory functions related to CST. In this paper, we proposed the very simple motion functions related to CST sequence recorded from a real fish by biologists. Through the computer simulations, we confirmed the usefulness of the proposed function.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2012.05a
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• pp.1209-1210
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• 2012