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오연택 한국기계기술학회 2018 한국기계기술학회지 Vol.20 No.3
Fire fighting robots to cope with fire are used to support fire fighting activities of firefighters. In the field of fire, the thermal performance test of the fire fighting robot is indispensable as the radiation intensity is high. For this purpose, a thermal barrier material which can be used for heat shielding was selected. Also, the results of the thermal barrier study, which can improve the heat shielding for the fire fighting robots, are presented by evaluating the characteristics of the heat shields of the material. By coating the Ag film on the surface of the robot, heat transmitted to the inside can be shielded, and the thermal barrier effect due to the difference in the thickness of the Ag coating can be seen. It can be seen that a secondary thermal barrier system using an Ag coated insulating box and a heat insulating board capable of protecting the electronic devices of the fire fighting robot at high temperatures and protecting the electronic devices for smooth functioning is efficient. This study is introduced a thermal barrier structure and system that can be used for fire fighting robots.
Unmanned Ground Vehicle의 이중축 구동 메커니즘 개발
오연택 한국기계기술학회 2016 한국기계기술학회지 Vol.18 No.5
The paper presented the driving mechanism structure of unmanned ground vehicle. The most fundamental feature of mobile platform has the transformable crawler. The crawler system transforms the shape of the track based on a driving mechanism. By adopting a double shaft structure to simply the crawler system was UGV platform. A automatic transmission is built to increase driving torque of unmanned ground vehicle. Available driving modes include a speed mode to drive at top speed on flat surfaces and a torque mode to handle uneven terrain, obstacles and stairs. The double shaft Also UGV platform was tested on uneven surfaces including muddy, sandy, and gravelly terrain. The UGV platform has shown good results in the driving test.
장애물 극복을 위한 Unmanned Ground Vehicle 플랫폼구조 연구
오연택 한국기계기술학회 2015 한국기계기술학회지 Vol.17 No.4
There are many researches about UGV mechanism regarding uneven terrains such as mud, sand, gravel, and vertical obstacle. This paper introduces a mobile mechanism to overcome the vertical obstacle for the UGV. Moreover, this paper proposes an asymmetric mechanism of wheels to overcome obstacle. Major system geometry parameters such as will be determined under certain constraints. Several mobile mechanisms will be compared with the proposed system.
Design of precision angular indexing system for calibration of rotary tables
오연택 대한기계학회 2012 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.26 No.3
The indexing table was developed for angle measurements on machine tools. The measuring techniques, which have been reviewed in this paper, are currently available in manufacturing engineering to calibrate the angle measurement. The measuring principles of each equipment are outlined and their capabilities are also discussed. The new indexing table using 6 points kinematic concept and employing ball and vee grooves location was designed and manufactured to calibrate angle errors of rotary tables using a laser interferometer. The manufacturing method was evaluated to manufacture the accurate vee grooves. A special cam was designed and manufactured to translate rotation movement into lift-up and rotation movement. A CNC machining centre and indexing head were used to manufacture the cam. All parts of the new indexing table were manufactured with a manufacturing tolerance according to drawings, squareness and parallelism checked to obey the 6 points kinematic concept. Also these factors controlled the repeatability of the new indexing table. After installing the new indexing table, the performance was evaluated using rotary table operating in both the horizontal and vertical orientations.
오연택 한국기계기술학회 2017 한국기계기술학회지 Vol.19 No.6
These days, the interests on the high speed handling robots are increasing because it is important to get down the unit cost of production to get the price competitiveness. The SCARA robot with simple mechanism is more suitable to implement the high speed robot system as well known. The moving parts of SCARA robot have to be designed for high speed. But the structural analysis is induced by the robot links because they drive in high acceleration and deceleration. In this reason, the structural analysis of the high speed SCARA robot is very important in the design process. In this paper, the study on the structural analysis of a high speed SCARA robot has been done and the research results will be introduced.