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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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The Journal of Korea Robotics Society
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Journal DOI :
The Korea Robotics Society
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Volume & Issues
Volume 5, Issue 4 - Nov 2010
Volume 5, Issue 3 - Aug 2010
Volume 5, Issue 2 - May 2010
Volume 5, Issue 1 - Feb 2010
Selecting the target year
Robotic system as artificial creatures for long-term relationship with users
Kim, Hyun ; Cho, Joon-Myun ;
The Journal of Korea Robotics Society, volume 5, issue 1, 2010, Pages 1~6
For the personal robot to serve humans as a companion in our daily life, it is obviously important that the robot should have a long-term relationship to users. In this paper, we introduce a simple idea on how to make the long-term relationship by using just low-cost and simple robots. We also describe the robotic artificial creature system to implement this idea. The artificial creature robots respond not only physical environment changes but also the logical information changes in the virtual world such as the Web. They consist of a control robot and several simple robots, which show users various group behaviors. Users have a relationship with them by observing these behaviors, rather than interacting with them. We separate physical robots and software applications in order that artificial creature robots can have more various behaviors made by various software applications. Finally, we implemented the system using a robot simulator to show some example cases.
Sound-based Emotion Estimation and Growing HRI System for an Edutainment Robot
Kim, Jong-Cheol ; Park, Kui-Hong ;
The Journal of Korea Robotics Society, volume 5, issue 1, 2010, Pages 7~13
This paper presents the sound-based emotion estimation method and the growing HRI (human-robot interaction) system for a Mon-E robot. The method of emotion estimation uses the musical element based on the law of harmony and counterpoint. The emotion is estimated from sound using the information of musical elements which include chord, tempo, volume, harmonic and compass. In this paper, the estimated emotions display the standard 12 emotions including Eckman's 6 emotions (anger, disgust, fear, happiness, sadness, surprise) and the opposite 6 emotions (calmness, love, confidence, unhappiness, gladness, comfortableness) of those. The growing HRI system analyzes sensing information, estimated emotion and service log in an edutainment robot. So, it commands the behavior of the robot. The growing HRI system consists of the emotion client and the emotion server. The emotion client estimates the emotion from sound. This client not only transmits the estimated emotion and sensing information to the emotion server but also delivers response coming from the emotion server to the main program of the robot. The emotion server not only updates the rule table of HRI using information transmitted from the emotion client and but also transmits the response of the HRI to the emotion client. The proposed system was applied to a Mon-E robot and can supply friendly HRI service to users.
Proposal of Moving Mechanism of Window Cleaning Robot
Lee, Dong-Hyuk ; Moon, Hyung-Pil ; Roh, Se-Gon ; Hwang, Dal-Yeon ; Yu, Won-Pil ; Choi, Hyouk-Ryeol ;
The Journal of Korea Robotics Society, volume 5, issue 1, 2010, Pages 14~22
Recently researches on the window cleaning robot are being conducted actively. Moving mechanismsof these window cleaning robots are divided into two categories, which are towed type and walking type. Towed type is focused on fast cleaning on the flat surface of building and walking type has priority on cleaning task on relatively complex surface with overcoming obstacles. Currently commercialized towed type window cleaning robot has weakness that it is hard to adhere closely with the wall and easy to be affected by wind. In case of walking type it has the problem that the position errors are continuously accumulated during motion. In this paper, we propose new towed and walking type mechanism which can compensate previous weaknesses. After that we estimate the performance of each proposed mechanism by simulation.
Network Based Robot Simulator Implementing Uncertainties in Robot Motion and Sensing
Seo, Dong-Jin ; Ko, Nak-Yong ; Jung, Se-Woong ; Lee, Jong-Bae ;
The Journal of Korea Robotics Society, volume 5, issue 1, 2010, Pages 23~31
This paper suggests a multiple robot simulator which considers the uncertainties in robot motion and sensing. A mobile robot moves with errors due to some kinds of uncertainties from actuators, wheels, electrical components, environments. In addition, sensors attached to a mobile robot can't make accurate output information because of uncertainties of the sensor itself and environment. Uncertainties in robot motion and sensing leads researchers find difficulty in building mobile robot navigation algorithms. Generally, a robot algorithm without considering unexpected uncertainties fails to control its action in a real working environment and it leads to some troubles and damages. Thus, the authors propose a simulator model which includes robot motion and sensing uncertainties to help making robust algorithms. Sensor uncertainties are applied in range sensors which are widely used in mobile robot localization, obstacle detection, and map building. The paper shows performances of the proposed simulator by comparing it with a simulator without any uncertainty.
Estimation of the Pipe Thickness using the Variation of the Group Velocity
Han, Seung-Hee ; Hwang, Jong-Myung ; Lee, Jang-Myung ;
The Journal of Korea Robotics Society, volume 5, issue 1, 2010, Pages 32~40
This paper proposes the technique of estimating the pipe thickness using the measured group velocity. To measure the group velocity from the accelerometer data in the frequency domain, Wigner-Ville distribution is utilized, which interprets the waveform of the shock wave. Using this measured group velocity, this paper proposes the technique to estimate the thickness of pipes with the impact on the pipe. The group velocity is estimated by the modeling correlation between the group velocity and the thickness of the pipe based on the propagation velocities. The correlation model between thickness and group velocity has been proved through the real experiments. The measured group velocity in the frequency-domain is the maximum at the center frequency of the bending waves in the modeling of the group velocity. In addition to these, a smoothing technique for analyzing lamb wave Wigner-Ville distribution has been introduced to improve the reliability of the data acquisition.
An Efficient Robot Path Generation Using Delaunay Mesh
Noh, Sung-Woo ; Ko, Nak-Yong ; Kim, Kwang-Jin ;
The Journal of Korea Robotics Society, volume 5, issue 1, 2010, Pages 41~47
This paper proposes a path planning method of a mobile robot in two-dimensional work space. The path planning method is based on a cell decomposition approach. To create a path which consists of a number of line segments, the Delaunay Triangulation algorithm is used. Using the cells produced by the Delaunay Triangulation algorithm, a mesh generation algorithm connects the starting position to the goal position. Dijkstra algorithm is used to find the shortest distance path. Greedy algorithm optimizes the path by deleting the path segments which detours without collision with obstacles.
Analysis of the Assist Characteristics for Torque of the Ankle Plantarflexion in Elderly Adults Wearing the Ankle-Foot Orthosis
Kim, Kyung ; Kang, Seung-Rok ; Piao, Yong-Jun ; Jeong, Gu-Young ; Kwon, Tae-Kyu ;
The Journal of Korea Robotics Society, volume 5, issue 1, 2010, Pages 48~54
Ankle-foot orthosis with a pneumatic rubber actuator, which is intended for the assistance and the enhancement of ankle muscular activities was developed. In this study, the effectiveness of the system was investigated during plantarflexion motion of ankle joint. To find a effectiveness of the system, the subjects performed maximal voluntary isokinetic plantarflexion contraction on a Biodex-dynamometer. Plantarfexion torque of the ankle joint is assisted by subject's soleus muscle that is generated when ankle joint do plantarflexion motion. We used the muscular stiffness signal of a soleus muscle for feedback control of ankle-foot orthosis as physiological signal. For measurement of this signal, we made the muscular stiffness force sensor. We compared a muscular stiffness force of a soleus muscle between with feedback control and without it and a maximal plantarflexion torque between not wearing a ankle-foot orthosis, without feedback control wearing it and with feedback control wearing it in each ten elderly adults. The experimental result showed that a muscular stiffness force of a soleus muscle with feedback control was reduced and plantarflexion torque of an ankle joint only wearing ankle-foot orthosis was reduced but a plantarflexion torque with feedback control was increased. The amount of a increasing with feedback control is more higher than the amount of a decreasing only wearing it. Therefore, we confirmed the effectiveness of the developed ankle-foot orthosis with feedback control.
Performance Improvement of GPS/DR Car Navigation System Using Vehicle Movement Information
Song, Jong-Hwa ; Kim, Kwang-Hoon ; Jee, Gyu-In ; Lee, Yeon-Seok ;
The Journal of Korea Robotics Society, volume 5, issue 1, 2010, Pages 55~63
This paper describes performance improvement of GPS/DR Integration system using area decision algorithm and vehicle movement information. In GPS signal blockage area, i.e., tunnel and underground parking area, DR sensor errors are accumulated and navigation solution is gradually diverged. We use the car movement information according to moving area to correct the DR sensor error. Also, vehicle movement is decided as stop, straight line, turn and movement changing region through DR sensor data analysis. The car experiment is performed to verify the supposed method. The results show that supposed method provides small position and heading error than previous method.
Remote Navigation Control for Intelligent Robot Using PSO
Mun, Hyun-Su ; Joo, Young-Hoon ;
The Journal of Korea Robotics Society, volume 5, issue 1, 2010, Pages 64~69
In this paper, we propose remote navigation control for intelligent robot using particle swarm optimization(PSO). The proposed system consists of interfaces for intelligent robot navigation and user interface in order to control the intelligent robot remotely. And communication interfaces using TCP/IP socket is used. To do this, we first design the fuzzy navigation controller based on expert's knowledge for intelligent robot navigation. At this time, we use the PSO algorithm in order to identify the membership functions of fuzzy control rules. And then, we propose the remote system in order to navigate the robot remotely. Finally, we show the effectiveness and feasibility of the developed controller and remote system through some experiments.
Trade-off between Model Complexity and Performance in Intra-frame Predictive Vector Quantization of Wideband Speech
Song, Geun-Bae ; Hahn, Hern-Soo ;
The Journal of Korea Robotics Society, volume 5, issue 1, 2010, Pages 70~76
This paper addresses a design issue of "model complexity and performance trade-off" in the application of bandwidth extension (BWE) methods to the intra-frame predictivevector quantization problem of wideband speech. It discusses model-based linear and non-linear prediction methods and presents a comparative study of them in terms of prediction gain. Through experimentation, the general trend of saturation in performance (with the increase in model complexity) is observed. However, specifically, it is also observed that there is no significant difference between HMM and GMM-based BWE functions.
Bridge Inspection System using Robot
Lee, An-Yong ; Oh, Je-Keun ; Choi, Young-Jin ;
The Journal of Korea Robotics Society, volume 5, issue 1, 2010, Pages 77~84
This paper proposes a bridge inspection system using a robot to manage the safety status of bridges. A conventional bridge inspection has a lot of problems because inspection is conducted manually by human. As an alternative, we are to develop a robot system having machine vision and this robot system is mounted on an end linkage of specially designed car having seven DOF (Degrees Of Freedom) to inspect cracks beneath bridge. This system is able to check a status of the bridge and record its changes every other year. As a result, the developed robot system offers us the inspection result of quality and reliability about the bridge inspection status. Also, we have tested the effectiveness of the suggested system through outdoor experiments.