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On behalf of the organizing and program committees, I welcome you to URAI 2011, the 8th International Conference on Ubiquitous Robots and Ambient Intelligence held in the newly built city, IFEZ Songdo, Korea. The aim of URAI 2011 is to bring together professors, researchers, engineers, and students to present their recent works and to discuss the state-of-the-art technologies related to robotics.
Mean-Shift algorithm has been applied mode seeking, image segmentation and object tracking. It is famous for fast convergence within limited boundary. But once exit that boundary, it fails to find correct region and position. We applied mean-shift algorithm in object tracking, and we suggest modified mean-shift tracking method. Using this modified version, we can track object without failing.
This paper presents novel design, development, and control of a mobile robot that is required to perform home service application. The robot is called KOBOKER (Korean Robot Worker) and designed for Korean home environment that requires living life on the floor. KOBOKER has been developed for Korean floor living life style with several design strategies such as balancing capability with two wheels,...
This paper presents the implementation and control of balancing line tracer (BLT) robot which has two wheels. The goal of BLT robot is to follow the line on the floor while maintaining balance. A camera sensor detects the line by using a camera instead of UV sensors since BLT is used in outdoor environment. The trajectory is generated and the robot is controlled to follow the line. Since BLT is required...
This paper presents the design and analysis of a robotic vehicle to carry human beings for entertainment in amusement park. The robotic vehicle called AmusTransBot has two wheels to maintain balance and navigate on the ground. The design of AmusTransBot is carried out to provide the excitement of the driver using balancing mechanism. Simulation studies are carried out to confirm the design concept.
Several methods of SLAM have been proposed. One of them is called Fast-SLAM based on Particle Filter. Especially, on the map construction based on a grid map is one of methods to improve accuracy of SLAM. However, those methods use only sensing data from the mobile robot to achieve SLAM. In this study, a new method of SLAM, which uses laser range sensors fixed in an intelligent space, is introduced...
Direct teaching in the industrial robot are the novel technique to teach manipulator with easy usage. However, teaching data by human hand cannot help having large noise error ranged low and high frequency. To use teaching data, post processing to correct teaching trajectory are required. Here, the intuitive feature point recognition method to rebuild teaching data with curvature information is proposed.
The rapid development of the Integrated Circuit (IC) manufacturing equipment industry requires greater efficiency for wafer transfer. However, the faster wafer transfer robot moves, the bigger the force applied on its support frame is, and also the bigger vibration aroused on the frame because of the low stiffness of the support frame. Meanwhile, some IC equipment are ultra-high sensitive to the vibration...
There has been meaningful research into the development of 3D world modeling techniques that are important requisite for intelligent vehicle navigation. In this paper we describe a 3D probabilistic voxel mapping process using stereo matching confidence. Proposed 3D probabilistic voxel map is more reliable representation than general voxel map that just contains the occupancy information. To get the...
Motion estimation plays an important role in scene matching, SLAM (Simultaneously Localization And Mapping) in computer vision field. In BMA (Block Matching Algorithm) for the video compression, motion estimation is also considerable. Motion prior which could be an initial guess for the next motion has an effect on how well motion is estimated. In many applications, motion model is assumed to be Gaussian...
This paper proposes the combined method of weighted least norm (WLN) and gradient projection (GP) for avoiding joint limit. WLN has the limitation of lower manipulability. Also GP has lack of reliability. Taking the advantages of both methods, we combined two methods and also performed numerical simulation. The simulation result shows the advantages of both methods.
To make better use of a service robot, which interacts with users during the task performance in everyday life, developers and/or users may frequently want to change action sequences so that a robot behaves in a natural manner. Emphasizing the procedural aspects of human task knowledge, we propose a method to generate a FSM-based robot task model from task procedures in possible scenarios. Proposed...
In the thin film solar cell production system, it is a very important task to handle the large size solar cell substrate. Many handling robots have been developed and applied in the manufacturing line. As the substrate size gets larger, dynamic analysis and vibration control including flexible forks becomes very important. Precise position control including the vibration of forks and the substrate...
In recent year, much progress has been made in outdoor 3D mapping. However, 3D mapping in real time is still a daunting challenge in urban environment. This paper addresses the problem of 3D mapping from 3D laser scans in urban environments in real time. To do this, we proposed geometric featured voxel which can efficiently represent 3D urban structure without loss of geometric properties. For evaluation...
In this study, a safe joint with a joint torque sensor is presented. The safe joint, named “Spring-Clutch”, is a simple passive mechanism that consists of a spring, a cam, and a joint torque sensor. When the torque applied is less than a pre-set threshold, the Spring-Clutch acts as a rigid joint between the input and output. However, if the applied torque exceeds the threshold, the Spring-Clutch is...
This paper presents a new work space modeling and search algorithm for complete coverage of robotic environment. The proposed algorithm named spatial cell diffusion (SCD) encodes the target area as groups of Gray codes for grid cells with size of instantaneous robot coverage and extends its sweep area by diffusing occupied cells outwards through continuous spiral movement. Based on the direct and...
This paper describes the analysis of Pneumatic Balloon Actuator (PBA). To do this, Finite Element Method (FEM) is used. In this paper, no-load characteristic of PBA is studied and through this, the displacement and stress of PBA can be calculated.
According to increasing the importance of underwater environments, the needs of UUV is growing. This paper represents the mechanism and algorithm of UUV docking system with 21-inch torpedo tubes for military submarines as a docking station. To improve the reliability of the docking, torpedo tubes launch a wired ROV and next the ROV combined with UUV is retrieved. For estimating the relative position...
Analysis on causes of inconsistency of Extended Kalman Filter (EKF) Simultaneous Localization And Mapping (SLAM) is mentioned in this paper. The effect of noise models and observation models on the inconsistent behavior of EKF SLAM was examined. In addition, the effect of registration of the false landmarks on inconsistent behavior of the EKF SLAM is mentioned in this paper. This paper identifies...
In this study, we present a novel design of an active morphing robot inspired by Venus flytrap [12–15]. The Venus flytrap has a pre-strained fiber structure which induces the bistability of the leaf that enables fast trapping motion via snap through. This fast shape changing motion can also be induced in a fiber based laminated composite products. Most composite products, i.e., tails of a helicopter,...
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