• 한국정보과학회논문지:소프트웨어및응용
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• 제37권8호
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• pp.641-646
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• 2010

스테레오 카메라를 갖춘 인간형 로봇이 자율적으로 주변 상황을 인지하면서 목적지까지의 경로를 실시간으로 생성 및 수정하는 간단한 알고리즘을 제시한다. 특징점들을 시각적 이미지에서 추출함으로써 주위의 장애물들을 인지한다. 인간형 로봇의 뒤뚱거리는 보행 움직임을 모델링함으로써 로봇의 중심부 기준에서의 실제 경로를 유추하여 계획된 경로와 비교함으로써 시각적 피드백 제어를 구현하고 성공적인 네비게이션을 수행한다. 실제 인간형 로봇의 네비게이션 실험을 통해 제안된 알고리즘의 가능성을 입증한다.

• 한국정밀공학회지
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• 제27권10호
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• pp.61-68
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• 2010

In order to let the humanoid robot walk on the uneven terrains, the robot's foot should have the similar structure and function as human's. The intelligent foot should be made up of toes and heel. When it walks on the uneven terrains, the foot's sole senses the force and adjusts foot's position before robot losing his balance. In this paper, the force sensors of robot's intelligent foot for having the similar structure and function like human are developed. The heel 3-axis force/moment sensor and toe force sensors for humanoid robot's intelligent foot is developed, and the characteristic tests of them are carried out. As a result of characteristic test, the interference error of the heel 3-axis force/moment sensor is less than 2.2%. It is thought that the developed force sensors could be used to measure the reaction forces which is applied the toes and the heel of a humanoid robot.

• 한국지능시스템학회논문지
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• 제17권4호
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• pp.500-505
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• 2007

현재 휴머노이드 로봇기술은 로봇의 제작과 기술의 구현에만 초점이 맞추어져 있으며, 로봇 개발을 위한 분석, 설계, 구현, 통합 등의 개발 메커니즘들에 대한 개방화된 방법론은 개발되어 않았다는 문제점이 있다. 본 논문에서는 현재까지 나타난 휴머노이드 로봇의 문제점을 극복하고, 미래형 로봇의 발전방향인 "개방화", "네트워크화", "모듈화" 개념을 만족하는 새로운 구조를 설계하기 위한 인간 팔의 형태학적 신경학적 모델을 제시하고 이를 기반으로 로봇의 각 관절 설계와 기구학적 모델에 의한 휴머노이드 로봇 팔의 설계 방법을 제시하였다.

• Journal of Electrical Engineering and Technology
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• 제8권4호
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• pp.879-888
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• 2013

This paper addresses the vision based local path planning system for obstacle avoidance. To handle the obstacles which exist beyond the field of view (FOV), we propose a Panoramic Environment Map (PEM) using the MDGHM-SIFT algorithm. Moreover, we propose a Complexity Measure (CM) and Fuzzy logic-based Avoidance Motion Selection (FAMS) system to enable a humanoid robot to automatically decide its own direction and walking motion when avoiding an obstacle. The CM provides automation in deciding the direction of avoidance, whereas the FAMS system chooses the avoidance path and walking motion, based on environment conditions such as the size of the obstacle and the available space around it. The proposed system was applied to a humanoid robot that we designed. The results of the experiment show that the proposed method can be effectively applied to decide the avoidance direction and the walking motion of a humanoid robot.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2004년도 ICCAS
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• pp.1764-1768
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• 2004

In the near future, robots will be used for the personal use. To provide useful services to humans, it will be necessary for robots to understand human intentions. Consequently, the development of emotional interfaces for robots is an important expansion of human-robot interactions. We designed and developed an intelligent emotional interface for the robot, and applied the interfaces to our humanoid robot, AMIET. Subsequent human-robot interaction demonstrated that our intelligent emotional interface is very intuitive and friendly

• 한국전자통신학회논문지
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• 제2권4호
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• pp.222-227
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• 2007

ISO15754 표준의 개방형 객체 모델링 및 프로파일링 기술을 적용하여 개발할 휴머노이드 로봇의 설계 및 구현에 대한 개방화된 개발 방법론을 제안한다.

• 제어로봇시스템학회논문지
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• 제20권2호
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• pp.223-231
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• 2014

Humanoid robot is the most suitable robot platform for effective human interaction and various intelligent services. The present work addresses development of real time wireless control application of humanoid robot's forward and backward walks, and turning in walking. For convenience of human users, the application is developed on Android OS (Operating System) working on his or her smartphone. To this end, theoretic background on various-directional biped walking is proposed based on joint trajectories for forward walking, which have been shaped with a global optimization method. In this paper, backward walking is scheduled by interchange of angles and angular velocities and additional change of signs in angular velocities at all the via-points connecting cubic polynomial trajectories. Turning direction in walking is also implemented by activating the transversal hip joint initially located in the support leg in two stages. After validation of the proposed walking schemes with Matlab simulator, a smartphone application for the omnidirectional walking has been developed to control a humanoid robot platform named DARwIn-OP interconnected via Wi-Fi. Experiment result of the present wireless control of a humanoid robot with smartphone is successful, and the application will be released in application market near future.

• 한국지능시스템학회논문지
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• 제17권5호
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• pp.640-647
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• 2007

본 논문은 유전알고리즘을 기초로 한 휴머노이드 로봇의 관절 제어에 관한 논문이다. 휴머노이드 로봇은 지면에 고정된 시스템이 아니기 때문에 기본적으로 불안정성을 내포하고 있다. 게다가 각 관절의 비선형성은 로봇의 안정성에 악영향을 미친다. 이에 만약 둘 중 하나라도 안정하지 못하면 로봇은 보행 중에 넘어지게 될 것이므로, 휴머노이드 로봇의 안정성을 확보하기 위해서는 이 두 가지가 모두 고려되어야 할 것이다. 이에 본 논문에서는 보행 안정성을 확보하기 위해 이 두 가지 문제 중에 로봇의 비선형성을 제거하면서 로봇이 주어진 궤적을 잘 추종하여 제어할 수 있는 제어기를 제안하였다. 이 제어기는 퍼지-슬라이딩 모드 제어기를 기본으로 하고 있으면서 모션 제어기가 첨가되어 있다. 그리고 이때 이러한 제어 이득값을 유전알고리즘을 통해 추종함으로써 보다 정밀한 제어가 가능하도록 하여 휴머노이드 로봇이 보다 안정적으로 보행할 수 있도록 하였다. 이 모든 과정은 시뮬레이션과 실험을 통해 검증하였다.

• Journal of Electrical Engineering and Technology
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• 제10권6호
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• pp.2368-2375
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• 2015

To accommodate various navigational commands, a humanoid should be able to change its walking motion in real time. Using the modifiable walking pattern generation (MWPG) algorithm, a humanoid can handle dynamic walking commands by changing its walking period, step length, and direction independently. If the humanoid is given a command to perform an infeasible movement, the algorithm substitutes the infeasible command with a feasible one using binary search. The feasible navigational command is subsequently translated into the desired center-of-mass (CM) state. Every sample time CM reference is generated using a zero-moment-point (ZMP) variation scheme. Based on this algorithm, various complex walking patterns can be generated, including backward and sideways walking, without detailed consideration of the feasibility of the navigational commands. In a previous study, the effectiveness of the MWPG algorithm was verified by dynamic simulation. This paper presents experimental results obtained using the small-sized humanoid robot platform DARwIn-OP.

• Journal of Electrical Engineering and Technology
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• 제10권6호
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• pp.2420-2426
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• 2015

This paper proposes an evolutionary optimization approach for optimal hopping of humanoid robots. In the proposed approach, the hopping trajectory is generated by a central pattern generator (CPG). The CPG is one of the biologically inspired approaches, and it generates rhythmic signals by using neural oscillators. During the hopping motion, the disturbance caused by the ground reaction forces is compensated for by utilizing the sensory feedback in the CPG. Posture control is essential for a stable hopping motion. A posture controller is utilized to maintain the balance of the humanoid robot while hopping. In addition, a compliance controller using a virtual spring-damper model is applied for stable landing. For optimal hopping, the optimization of the hopping motion is formulated as a minimization problem with equality constraints. To solve this problem, two-phase evolutionary programming is employed. The proposed approach is verified through computer simulations using a simulated model of the small-sized humanoid robot platform DARwIn-OP.