• 전기학회논문지
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• 제60권2호
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• pp.389-397
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• 2011

The global dynamic window approach (DWA) is widely used to generate the shortest path of mobile robots considering obstacles and kinematic constraints. However, the dynamic constraints of robots should be considered to generate the minimum-time path. We propose a modified global DWA considering the dynamic constraints of robots. The reference path is generated using A* algorithm and smoothed by cardinal spline function. The trajectory is then generated to follows the reference path in the minimum time considering the robot dynamics. Finally, the local path is generated using the dynamic window which includes additional terms of speed and orientation. Simulation and experimental results are presented to verify the performance of the proposed method.

• 한국안전학회지
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• 제10권3호
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• pp.110-114
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• 1995

Bacause of increasing the use in Industrial robots, the accident rate has been increasing now a days. The prediction of accident could be very hard as there are so many factors which occured accident. Removing the accident factors in industrial robots can be diagnosed by the human experts who are very familiar with in those area. The purpose of this study is a development of finger fault diagnosis system for industrial robots. We have many problems such as a long time to get the expert knowledge and the number of expert to be limited. To solve these problems lots of investment and time are required, and then the exepert system to finger fault diagnosis for industrial robots can be applied.

• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 2011년도 추계학술대회
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• pp.165-167
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• 2011

Autonomous robots are intelligent machines that are capable of performing task in the world themselves with little or no human intervention. One of the main reason autonomous robots gained popularity in human's world is their ability to perform task with high degree of precision, accuracy and also consistency. One of the most studied fields in autonomous robot is the ability of decision making in robots. To tackle the ability of robots to make decision, this paper proposed an Autonomous Maze Solving Robot that is able to solve a maze using the optimum solution. The maze and the design of the robot are in compliance with IEEE Micromouse competition rules and regulation. Micromouse is an autonomous maze solving robot that shall be able to explore a maze on its own from a predefined starting location and find the optimum path to reach the predefined goal in the maze without human's intervention.

• 전기학회논문지
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• 제66권1호
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• pp.114-120
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• 2017

The work present in this paper deals with a navigation problem for multiple mobile robots in unknown indoor environments. The environments are completely unknown to the robots; thus, proximity sensors installed on the robots' bodies must be used to detect information about the surroundings. The environments simulated in this work are dynamic ones which contain not only static but also moving obstacles. In order to guide the robot to move along a collision-free path and reach the goal, this paper presented a navigation method based on fuzzy approach. Then genetic algorithms were applied to optimize the membership functions and rules of the fuzzy controller. The simulation results verified that the proposed method effectively addresses the mobile robot navigation problem.

• Advances in robotics research
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• 제1권1호
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• pp.41-59
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• 2014

This paper deals with the problem of steering a group of mobile robots along a reference path while maintaining a desired geometric formation. To solve this problem, the overall formation is decomposed into numerous geometric patterns composed of pairs of robots, and the state of the geometric patterns is defined. A control algorithm for the problem is proposed based on the Nash equilibrium strategies incorporating receding horizon control (RHC), also known as model predictive control (MPC). Each robot calculates a control input over a finite prediction horizon and transmits this control input to its neighbor. Considering the motion of the other robots in the prediction horizon, each robot calculates the optimal control strategy to achieve its goals: tracking a reference path and maintaining a desired formation. The performance of the proposed algorithm is validated using numerical simulations.

• 전자통신동향분석
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• 제34권4호
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• pp.98-107
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• 2019

This article examines the technical trends of recent logistics and delivery robots. Since the commencement of the $4^{th}$ industrial revolution, logistics robots and delivery robots have gained considerable attention from the public and the market owing to advances in artificial intelligence and information and communication technology. This article reviews logistics and delivery robots from the perspectives of the market and academia. In addition, we summarize difficulties that they currently face and enumerate further work for their success in the market.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2014년도 춘계학술대회
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• pp.871-872
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• 2014

이 논문에서는 군집 로봇들이 미로 탈출을 위해 협력하는 방법에 대해 제안한다. 로봇들은 ZIGBEE로 서로 통신할 수 있으나 로봇들의 연산기능이 낮아 중앙제어 시스템이 로봇들에게 명령을 전달한다. 로봇들은 보이지 않는 미로를 탐색하며 지도를 만들기 위해 이동과 같은 정보를 중앙제어 시스템에 전송한다. 중앙제어시스템은 수신된 데이터를 분석하여 미로 탈출을 위한 경로를 찾는다.

• 로봇학회논문지
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• 제16권1호
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• pp.17-22
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• 2021

Soft robot research has been actively conducted due to the advantages of soft materials that have less motion restrictions and higher energy efficiency compared to rigid robots. In particular, soft robots are being applied in more and more diverse fields, and the need for soft robots is increasing, especially when dealing with soft or deformable objects that rigid robots cannot perform. Various soft robots are being developed, and studies on artificial muscles with versatility, seamless integration with sensing, and self-healing capabilities are being proposed. In this study, we propose one of the most simple rectangular shaped HASEL (Hydraulically amplified self-healing electrostatic) actuators and compare the performance according to shape deformation such as the size or ratio of actuators and electrodes. Developing these actuators can be used in many ways for artificial muscles in soft robotics.

• 로봇학회논문지
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• 제18권4호
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• pp.409-418
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• 2023

The purpose of this study is to evaluate the usability of the care robots to prevent pressure injury and to present directions for improvement. Thirty-two caregivers of severely disabled people and older adults with mobility difficulties participated in this study. They used the care robot in a real care environment for 2 weeks and conducted pre and post-care interviews. Based on the interview results, improvements were derived through the technical modeling method of care robots. Considering the circumstances in which caregivers take care of a large number of patients in nursing homes and hospitals, it is necessary to ensure the convenience and safety of remote control and side rail operation of the care robots to prevent pressure injury. We expect that the results of this study will be used as basic data for development of care robots to prevent pressure injury.

• 전자통신동향분석
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• 제39권3호
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• pp.25-35
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• 2024

As artificial intelligence advances, major countries are actively promoting the use of intelligent robots to improve industrial productivity and enhance the quality of life. As robots become more capable of interacting with humans, they are being increasingly integrated into the human realm. Accordingly, major countries are actively implementing policies to lead intelligent robot technology and secure market leadership. We examine the status of policies related to intelligent robots in five countries: United States, China, Japan, Germany, and South Korea. These countries apply 1) government-led intelligent robot policies, 2) investments to secure core robot technologies and promote the convergence of artificial intelligence and robots, 3) programs for research and development on intelligent robots, 4) strengthened human-centered human-robot interaction and collaboration, and 5) ethics, stability, and reliability in the development and use of robot technologies. For Korea to compete with major countries and promote the intelligent robot industry, high-risk, high-performance innovation projects should be prioritized.