Search | Korea Science

이영우;안태영;권구빈;손신국;민정동
- 제어로봇시스템학회:학술대회논문집
- /
- 1986.10a
- /
- pp.1-4
- /
- 1986
This paepr handles the illustrations about various characteristics of SCARA type ROBOT developed by Samsung Precision Ind. and includes system structure, controller, robot language and future developing plan. This robot has high-precision, high-speed and flexible movement performances. So it is very useful for small parts assembly systems.
PDF

Han, Wun-Dong;Shon, Jin-Geun
- The Journal of The Korea Institute of Intelligent Transport Systems
- /
- v.7 no.3
- /
- pp.74-81
- /
- 2008
The control system of high-precision AC power is important in traffic management lighting and beaconing of aerodromes, etc. To control AC power supply in these load characteristics, inverter systems of AC/DC/AC conversion are widely used in high-precision current control. Therefore, in this paper, a inverter system of constant current regulation using improved measuring technique of feedback current is proposed. Proposed measuring techniques improve response and precision in that it use moving average method of instantaneous RMS for measuring current sensing. Results of the computer simulation and experiment prove the effects of proposed system.
PDF

Yoo, Sang-Hoon;Lim, Jeong-Min;Oh, Jeong-Hun;Kim, Ho-Beom;Lee, Kwang-Eog;Sung, Tae-Kyung
- Journal of Positioning, Navigation, and Timing
- /
- v.4 no.3
- /
- pp.123-130
- /
- 2015
In this study, a carrier smoothed global positioning system / dead reckoning (CSGPS/DR) integrated system for high-precision trajectory estimation for the purpose of vehicle navigation was proposed. Existing code-based GPS has a low position accuracy, and carrier-phase differential global positioning system (CPDGPS) has a long waiting time for high-precision positioning and has a problem of high cost due to the establishment of infrastructure. To resolve this, the continuity of a trajectory was guaranteed by integrating CSGPS and DR. The results of the experiment indicated that the trajectory precision of the code-based GPS showed an error performance of more than 30cm, while that of the CSGPS/DR integrated system showed an error performance of less than 10cm. Based on this, it was found that the trajectory precision of the proposed CSGPS/DR integrated system is superior to that of the code-based GPS.
https://doi.org/10.11003/JPNT.2015.4.3.123 인용 PDF KSCI KPUBS HTML

홍정표;박성준;권순재
- The Transactions of the Korean Institute of Power Electronics
- /
- v.8 no.6
- /
- pp.512-518
- /
- 2003
Position controls are very important in semiconductor manufacturing devices, machine tools Precision measuring instruments, etc. To measure the distance of movement of moving objects in minute units and the accuracy of measurement for the moving distance in these devices affect the performance of the whole devices. Therefore, in those Precision instruments, a sensing device that can measure the distance of movement with high-precision resolution is required. In this paper, a novel encoder of digital and analog hybrid type is proposed. It is shown that from this experiment a high-resolution angle measurement device can be designed by a low cost incremental encoder.
PDF KSCI

Kajihara, Yusuke;Takeuchi, Toru;Takahashi, Satoru;Takamasu, Kiyoshi
- International Journal of Precision Engineering and Manufacturing
- /
- v.9 no.3
- /
- pp.51-54
- /
- 2008
A novel stereolithography method using evanescent light has been proposed as a means to realize 100-nanometer resolution. An in-process measurement system with high accuracy has been introduced to the nanostereolithography apparatus. Specifically, an optical microscopic system was developed to monitor the exposure process and a confocal positioning system was established to improve the longitudinal positioning accuracy in the layer-by-layer process. A high-power objective lens, a tube lens, and a charge coupled device (CCD) were included in the optical microscopic system, whereas a laser, a high-power objective lens, a piezoelectric (PZT) stage, a condenser lens, a pinhole, and a photomultiplier (PMT) made up the confocal microscopic system. Two verification experiments were conducted, and the results indicated that the optical microscopic system had a horizontal resolution of 200 nm and that the confocal positioning system provided a depth resolution of 30.8 nm. These results indicate that nanostereolithography can be successfully performed with this system.
PDF KSCI