• Proceedings of the KIEE Conference
• /
• 2011.07a
• /
• pp.1007-1008
• /
• 2011

LSPM(Line Start Permanent Motor)은 기존의 가정용으로 널리 사용되고 있는 단상유도기에 영구 자석을 삽입함으로써 별도의 회로 없이 정상상태에서 동기기로 작용하는 고효율의 전동기이다. 하지만 기동시 높은 전류로 인한 전기자 반작용과 온도 상승으로 인하여 자석의 불가역 감자가 빈번하게 일어나는 문제점을 가지고 있다. 이에 본 논문은 모터 형상에 따른 영구자석의 퍼미언스 계산을 통해 동작점을 산정함으로서 불가역 감자가 발생하지 않는 영구자석의 최적의 사이즈를 선정하는데 목적을 두었다.

• Proceedings of the Korean Institute of Intelligent Systems Conference
• /
• 2001.12a
• /
• pp.133-136
• /
• 2001

This paper partially presents a Hierachical neural network architecture for providing the intelligent control of complex Automatic Transmission(AJT) system which is usually nonlinear and hard to model mathematically. It consists of the module to apply or release an engine brake at the slope and that to judge the intention of the driver. The HNN architecture simplifies the structure of the overall system and is efficient for the learning time. This paper describes how the sub-neural networks of each module have been constructed and will compare the result of the intelligent hJT control to that of the conventional shift pattern.

• Proceedings of the Korea Inteligent Information System Society Conference
• /
• 1999.03a
• /
• pp.161-171
• /
• 1999

Query language has been widely used as a convenient tool to obtain information from a database. However, users demand more intelligent query processing systems that can understand the intent of an imprecise query and provide additional useful information as well as exact answers. This paper introduces a meta-database and presents a query processing mechanism that supports a variety of intelligent queries in a consistent and integrated way. The meta-database extracts data abstraction knowledge form an underlying database on the basis of a multilevel knowledge representation framework KAH. In cooperation with the underlying database, the meta-database supports four types of intelligent queries that provide approximately or conceptually equal answers as well as exact ones.

• Proceedings of the Korean Information Science Society Conference
• /
• 2007.06c
• /
• pp.482-487
• /
• 2007

실내의 완벽 주행이 주요 목적인 청소로봇은 자기 위치를 인식 할 수 있어야한다. 자기 위치를 제대로 인식하지 못하게 된다면 청소할 방을 모두 돌지 못하고 방 청소를 마치게 된다. 청소로봇이 상용화 되기 위해서는 저렴한 가격의 보드를 선호한다. 이것은 현재 나온 복잡한 계산을 요구하는 알고리즘을 사용하지 못하거나 사용하여도 속도가 느린 문제를 가진다. 영상 프레임 처리 속도가 느릴 경우 처리되는 동안 로봇이 움직이지 못하여 부드러운 움직임을 불가능하게 한다. 본 논문은 저사양의 하드웨어에서 자기 인식을 할 수 있는 시스템을 제안한다. 자기 인식을 하기 위해 처리 되어야 하는 전처리 과정과 전처리를 거친 데이터를 이용하여 자기 위치를 인식하도록 이동거리와 회전각을 계산하는 방법을 제안한다. 마지막으로 제안된 방법들을 이용하여 실제 이동 값과 비교, 분석한다.

• The Journal of Korea Robotics Society
• /
• v.2 no.4
• /
• pp.310-316
• /
• 2007

The paper proposes a human-following behavior of mobile robot and an intelligent space (ISpace) is used in order to achieve these goals. An ISpace is a 3-D environment in which many sensors and intelligent devices are distributed. Mobile robots exist in this space as physical agents providing humans with services. A mobile robot is controlled to track a walking human using distributed intelligent sensors as stably and precisely as possible. The moving objects is assumed to be a point-object and projected onto an image plane to form a geometrical constraint equation that provides position data of the object based on the kinematics of the intelligent space. Uncertainties in the position estimation caused by the point-object assumption are compensated using the Kalman filter. To generate the shortest time trajectory to track the walking human, the linear and angular velocities are estimated and utilized. The computer simulation and experimental results of estimating and trackinging of the walking human with the mobile robot are presented.

• International Journal of Safety
• /
• v.11 no.1
• /
• pp.6-10
• /
• 2012

This paper presents a study on the analysis for reducing the number of false alarms in fire detection system. In order to intelligent algorithm fuzzy logic is adopted in developing fire detection system to reduce false alarm. The intelligent fire detection algorithm compared and analyzed the fire and non-fire signatures measured in circuits simulating flame fire and smoldering fire. The algorithm has input variables obtained by fire experiment with K-type thermocouple and optical smoke sensor. Also triangular membership function is used for inference rules. And the antecedent part of inference rules consists of temperature and smoke density, and the consequent part consists of fire probability. A fire-experiment is conducted with paper, plastic, and n-heptane to simulate actual fire situation. The results show that the intelligent fire detection algorithm suggested in this study can more effectively discriminate signatures between fire and similar fire.

• The Journal of Korea Robotics Society
• /
• v.5 no.1
• /
• pp.64-69
• /
• 2010

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.

• Smart Structures and Systems
• /
• v.1 no.1
• /
• pp.1-12
• /
• 2005

This paper describes the area of intelligent systems research as funded by the Civil and Mechanical Systems (CMS) Division of the National Science Foundation (NSF). With developments in computer science, information technology, sensing and control the design of typical machines and structures by civil and mechanical engineers is evolving toward intelligent systems that can sense, decide and act. This trend toward electro-mechanical design is well-established in modern machines (e.g. vehicles, robots, disk drives) and often referred to as mechatronics. More recently intelligent systems design is becoming an important aspect of structures, such as buildings and bridges. We briefly review recent developments in structural control, including the role that NSF has played in their development, and discuss on-going CMS activities in this area. In particular, we highlight the interdisciplinary initiative on Sensors and Sensor Networks and the Network for Earthquake Engineering Simulation (NEES). NEES is a distributed cyberinfrastructure to support earthquake engineering research, and provides the pioneering NEES grid computing environment for simulation, teleoperation, data collection and archiving, etc.

• Journal of Korea Multimedia Society
• /
• v.8 no.6
• /
• pp.814-826
• /
• 2005

The user-centric broadcasting environment includes the agent system and personalized broadcasting services for user-adaptive TV watching. In this paper, we propose broadcasting environment consisting of personalized broadcasting services and a multi-agent broadcasting system for the services. The proposed system employs the intelligent agent technology of the Foundation for Intelligent Physical Agents (FIPA) as well as metadata technology of MPEG-7 and TV-Anytime Forum (TVAF). To verify the usefulness of the proposed environment, we implemented a test-bed and demonstrated the proposed agent system with three services including intelligent user-information management service, information mobility service, and content retrieval service.

• Proceedings of the Korean Institute of Communication Sciences Conference
• /
• 2006.07a
• /
• pp.258-258
• /
• 2006