• 한국정밀공학회지
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• 제30권10호
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• pp.1023-1029
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• 2013

Water running animals such as basilisk lizards have an advantage of high-speed movement and high power efficiency on water; so researchers in robotic fields have been interested in the water running locomotion. This paper presents prototype-design and experimental study on the fourand six-legged water running robot. Based on the previously proposed quadruped water running robot, we assemble a hexapedal water running robot. The legs of the water running robot are designed based on four-bar parallel link for repeated motion along to pre-defined path. Stability performance of the quadruped and hexapedal water running robot are investigated by experiments on rolling criterion. As a result, hexapedal robot performs better stability than quadruped robot. Based on the hexapedal robot design, we are planning to optimize the position of legs and operating frequency.

• 로봇학회논문지
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• 제4권1호
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• pp.43-48
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• 2009

Generally, underwater vehicle type of propeller shows low efficiency about 50%-55%. However, the efficiency of swimming mechanism of a fish is 60%-70%, more efficient about 20% than screw propellers. Recently, research of underwater vehicle type of fish increase due to its good efficiency and is regarded as a typical bio-mimical robot. In this research, a new algorithm and mechanism that show low energy consumption imitating swimming mechanism of fish proposed increasing speed and running time in field trial.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2010년도 추계학술대회 논문집
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• pp.213-214
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• 2010

• 로봇학회논문지
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• 제13권2호
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• pp.97-102
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• 2018

A small and lightweight crawling robots have been actively studied thanks to their outstanding mobility and maneuverability. Those robots can navigate into more confined spaces that larger robots are unable to reach or enter such as debris and caves. In this paper, we propose a milli-scale hexapedal robot based on planar linkage design. To make this possible, two necessary conditions for successful crawling are satisfied: thrust force from the ground and aerial phase while running. These conditions are achieved through a newly developed leg design. The robot has a pair of legs and each leg has three feet. Those feet alternatively moves based on 1DOF planar linkage. This linkage is installed at each side of the robot and finally the robot shows the alternating gait and aerial phase during running. As a result, the robot runs with the crawling speed of 0.9 m/s.

• 대한기계학회:학술대회논문집
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• 대한기계학회 2008년도 추계학술대회A
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• pp.882-887
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• 2008

In this paper, the dependency of energy efficiency on the walking/running pattern and the walking/running period is analyzed though simulations of walk, trot and gallop. A quadruped animal has its own original features in the walking pattern and the walking period for adaptation to the environment. The robot model used in the simulations has three active joints and one passive spring-loaded joint at each leg, which is based on the actual quadruped robot, HUNTER (Hanyang UNiversity TEtrapod Robot), developed in the lab. Also included is the dependency of energy efficiency on the walking period in trot.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2000년도 제15차 학술회의논문집
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• pp.520-520
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• 2000

In this paper, it used a soccer robot which needs the important Held of robot technology as the wheel type mobile robot. With the soccer robot, as for the especially important one, "strategy" "the orbit control of the robot", and "the efficiency of the robot" is given. Therefore, it paid attention to " the orbit control of the robot " and it controlled an orbit of the soccer robot using the PID control. the soccer robot using the PID control.

• 정보교육학회논문지
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• 제14권1호
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• pp.25-33
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• 2010

'교구로봇' 교육은 영재교육과 경진대회를 통하여 초등학생과, 학부모, 교사에게 기대와 인식이 매우 보편화 되었으며, 창의성과 통섭교육에 대한 관심이 높아짐에 따라 초등학교 방과후 학교의 로봇교육은 더욱 증가할 것으로 보인다. 그러나 방과후 로봇 교실 운영에 대한 초등현장의 교구로봇 교실 운영 실태조사가 이루어지지 않고 있을 뿐만 아니라 지도교사 양성이나 체계적인 프로그램 운영 관리가 부족한 상황이다. 본 연구는 지역별, 지역단위별, 공 사립별, 학급수별에 따른 초등학교의 방과 후 '교구로봇' 교실의 운영실태 및 담당 지도교사의 인식을 조사하여 문제점을 파악하고 보다 바람직하고 효율적인 방향으로 방과후학교 로봇 교실이 정착될 수 있도록 시사점을 제시하고자 한다. 본 연구의 결과에 따르면 지역별, 지역단위별, 학급수에 따른 '로봇교실'의 실시현황은 유의미한 차이를 보였으며, 수업을 운영함에 있어 가장 큰 문제는 반편성 방법에 있는 것으로 나타났다. 또한, 방과후학교 수업을 통하여 기대하는 효과에 대하여 지도교사들은 사교육비 절감 및 창의력 향상을 가장 기대하고 있는 것으로 나타났다.

• 대한기계학회:학술대회논문집
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• 대한기계학회 2008년도 추계학술대회A
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• pp.888-893
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• 2008

In This paper proposes the control algorithm for quadruped robots on irregularly sloped uneven surface. Body balance is important in stable running locomotion. Since the body balance is determined by the forces applied at the feet during touchdown phase, the ground reaction force is controlled for stable running. To control the forces at each foot, the desired force is generated. The generated desired force is compared with actual contact force, then, the difference between them modifies the foot trajectory. The desired force is generated by combination of the rate change of the angular and linear momentum at flight. Then the rate change of momentum determines each force distribution. The distribution of the force is carried out by fuzzy logic. The computer simulation is carried out with the commercial software RecurDyn$^{(R)}$. Dynamic model simulation program show that the stable running on the irregularly sloped uneven surface are accomplished by the proposed method.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2005년도 ICCAS
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• pp.308-313
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• 2005

For a real-time quadruped robot running control, there are many important objectives to consider. In this paper, the running control architecture based on global states, which describe the cyclic target motion, and central pattern is proposed. The main goal of the controller is how the robot can have robustness to an unpredictable environment with reducing calculation burden to generate control inputs. Additional goal is construction of a single framework controller to avoid discontinuities during transition between multi-framework controllers and of a training-free controller. The global state dependent neuron network induces adaptation ability to an environment and makes the training-free controller. The central pattern based approach makes the controller have a single framework, and calculation burden is resolved by extracting dynamic equations from the control loop. In our approach, the model of the quadruped robot is designed using anatomical information of a cat, and simulated in 3D dynamic environment. The simulation results show the proposed single framework controller is robustly performed in an unpredictable sloped terrain without training.

• 한국정보통신학회논문지
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• 제25권4호
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• pp.549-557
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• 2021

본 연구는 교육용 로봇 중 한 종류인 스마트로봇을 대상으로 기존의 OID 센서 환경을 이용하되 주행의 문제점을 프로그램으로 처리하는 것을 제안 하고자 한다. 주행 정보를 가지고 있는 지도환경, 위치인식, 경로계획, 장애물 회피 및 경로 재설정을 중심으로 주행 테스트 환경을 구축했으며 평균적인 최종 오류 률이 아니라 오류가 증가하는 시점을 재보정의 순간으로 잡아야 한다는 가정을 통해 실험을 진행했다. 그 과정을 통해 선행실험에 비해 안정적인 주행 결과를 얻었다. 본 연구가 현재 판매되는 저가형 센서를 장착한 교육용 로봇들의 주행 성능을 올릴 수 있는 개발방법이 될 것이라 본다.