• 융합신호처리학회 학술대회논문집
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• 한국신호처리시스템학회 2000년도 하계종합학술대회논문집
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• pp.145-148
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• 2000

Nowadays there are lots of researches on robot systems working on danger environments and control led remotely. In this paper, we describe a virtual robot interface system based on Internet In the system, a client can order scanning for range finding, then server detects a 3D profile data from the objects by using robot controlling and a range finder automatically. If one clicks the original position of object and destination on virtual space, the robot moves the object to the new position in real space. The proposed interface system supports advanced virtual 3D interface and makes it possible one to manage the objects remotely more conveniently.

• 제어로봇시스템학회논문지
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• 제3권2호
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• pp.169-178
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• 1997

This paper presents a new solution approach to moving obstacle avoidance problem of a robot. A new concept, avoidability measure(AVM) is defined to describe the state of a pair of a robot and an obstacle regarding the collision between them. As an AVM, virtual distance function(VDF) is derived as a function of three state variables: the distance from the obstacle to the robot, outward speed of the obstacle relative to the robot, and outward speed of the robot relative to the obstacle. By keeping the virtual distance above some positive limit value, the robot avoids the obstacle. In terms of the VDF, an artificial potential is constructed to repel the robot away from the obstacle and to attract the robot toward a goal location. At every sampling time, the artificial potential field is updated and the force driving the robot is derived from the gradient of the artificial potential field. The suggested algorithm drives the robot to avoid a moving obstacle in real time. Since the algorithm considers the mobility of the obstacle and robot as well as the distance, it is effective for moving obstacle avoidance. Some simulation studies show the effectiveness of the proposed approach.

• 한국생산제조학회지
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• 제26권1호
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• pp.20-29
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• 2017

Motion synchronization between developed real and virtual robots for object recognition and target tracking is introduced. ASUS's XTION PRO Live is implemented as a sensor and configured to recognize walls and obstacles, and perceive objects. In order to create virtual reality, Unity 3D is adopted to be associated with the real robot, and the virtual object is controlled by using an input device. A Bluetooth serial communication module is used for wireless communication between the PC and the real robot. The motion information of a virtual object controlled by the user is sent to the robot. Then, the robot moves in the same way as the virtual object according to the motion information. Through motion synchronization, two scenarios, which map the real space and current object information with virtual objects and space, were demonstrated, yielding good agreement between the two spaces.

• 한국소음진동공학회논문집
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• 제17권10호
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• pp.907-911
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• 2007

Compliance of joints must be considered when we analyze dynamics of a multi-body system. If the virtual model for CAE(computer aided engineering) analysis does not consider compliance, the result of CAE analysis can be very different from the actual experimental result. Especially in a biped walking robot, the robot may lose walking stability due to the compliance in joints of a walking robot. This paper proposed a method applying a compliance of joints in the biped walking robot to a virtual model. Also, through the 3-D displacement measurement using a laser tracker, it was demonstrated that the virtual model considering the joint compliance could effectively simulate the nonlinear motion of the real model.

• 제어로봇시스템학회논문지
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• 제19권3호
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• pp.248-255
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• 2013

This paper proposes the architecture of the RILS (Robot-in-the-Loop-Simulation) consisting of the robot, the virtual robot, and the avatar robot which is the type of virtual robots operating according to the robot status and behavior. And the synchronization algorithm for mobilization part of the avatar robot is suggested, which reduces the difference between behaviors of the robot and those of the avatar robot. This difference occurs due to the environmental and mechanical mismatches between the robot and avatar robot. In order to reduce this difference in robots behaviors, the synchronization algorithm controls the avatar robot based on the data observed from the robot's behavior. The proposed architecture and the synchronization algorithm are validated from some simulation results.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2002년도 ICCAS
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• pp.109.4-109
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• 2002

$\textbullet$ modularized personal robot controller $\textbullet$ module interface $\textbullet$ The structure of the virtual machine $\textbullet$ RPL (Robot Programming Language) $\textbullet$ compiler $\textbullet$ Port Configuration $\textbullet$ API

• International Journal of Fuzzy Logic and Intelligent Systems
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• 제5권4호
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• pp.302-309
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• 2005

We have studied a model and application that evolves the behavioral knowledge of a virtual robot. The knowledge is represented in classification rules and a neural network, and is learned by a genetic algorithm. The model consists of a virtual robot with behavior knowledge, an environment that it moves in, and an evolution performer that includes a genetic algorithm. We have also applied our model to an environment where the robots gather food into a nest. When comparing our model with the conventional method on various test cases, our model showed superior overall learning.

• 전자공학회논문지 IE
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• 제44권3호
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• pp.35-41
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• 2007

본 논문에서는 보상신호를 수반하는 인공지능 기반의 가상 로봇 학습 행위 모델을 제안하고 이 모델을 3가지 환경에 적용시킨 후에 보상 방법에 따른 가상 로봇의 학습 속도를 비교 검토하였다. 결과로서 환경이 다소 복잡하면 즉, 로봇 집단의 크기, 먹이 수, 장애물 수가 다소 많은 경우 학습 세대가 충분하다면 강화 보상 방법이 강화와 억제를 혼합한 보상 방법 보다 우월함을 알 수 있었다. 하지만 복잡하지 않은 환경에서는 혼합 보상 방법이 우수했다.

• 한국정밀공학회지
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• 제20권12호
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• pp.73-79
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• 2003

Recently, the tole-robot operations to an unstructured environment have been widely researched. The human's interaction with the tole-robot system can be used to improve robot operation and performance for an unknown environment. The exact modeling based on real environment is fundamental and important process for this interaction. In this paper, we propose an extrinsic parameter calibration and data augmentation method that only uses a circular jig in the hand-eye laser virtual environment. Compared to other methods, easier estimation and overlay can be done by this algorithm. Experimental results using synthetic graphic demonstrate the usefulness of the proposed algorithm.

• 융합신호처리학회논문지
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• 제2권4호
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• pp.85-90
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• 2001

최근 생체 모방 시스템과 지능 로봇 등에 대한 관심에 따라 일정한 작업을 스스로 수행하는 로봇 에이전트 시스템에 대한 관심이 높아지고 있다 로봇 에이전트를 보다 인간 친화형으로 제어하기 위한 인터페이스가 요구되고 있는데 본 논문에서는 인터넷 환경에 기반한 로봇 에이전트의 원격 제어 및 모니터링을 위한 가상 3D 인터페이스 시스템을 제안한다. 제안한 시스템은 매니저-에이전트 모델로 설정하고 작업자가 원격지에 있는 매니저에서 가상의 3D사용자 인터페이스 환경하에서 마우스로 로봇 에이전트에게 작업 지시 내용에 따라 스스로 물체의 3차원 형상을 인식하고 이를 목표한 위치로 옮기는 작업을 수행하게 된다. 제안된 시스템은 이 작업의 과정을 가상의 3D 그래픽과 실제 영상을 보여주는 개선된 인터페이스를 제공함으로써 보다 쉽고 인간 친화적인 로봇 에이전트의 제어가 가능함을 보인다.