http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
RLS 알고리즘을 이용한 정전용량형 원격 RF 센서 시스템 구현
이준탁(JohnTark Lee),김경엽(KyungYup Kim) 한국정보기술학회 2008 한국정보기술학회논문지 Vol.6 No.2
In this paper, passive telemetry RF sensor system including capacitive sensor is implemented using RLS(Recursive Least Square) algorithm. Passive telemetry RF sensor system based on inductive coupling principle is proposed to solve complexity and power consumption of generally used IC type. Passive telemetry RF sensor system is modeled mathematically using phasor method and its mathematical model is rearranged to apply RLS algorithm to the passive telemetry RF sensor system. Capacitive parameter of the passive telemetry RF sensor system is estimated with RLS algorithm which has the characteristic of error-sum convergence. Phase difference detector based on TMS320F2406 using Exclusive OR circuit is proposed to measure phase difference between input voltage and output voltage. The efficiency of this RF sensor system in the noisy environment is verified by checking the estimated results on the measured data.
FPGA 기반의 언버터 NMEA2000 프로토콜 통신 시스템의 구현
유영호(YungHo Yu),홍지태(JiTae Hong),박동현(DongHyun Park),김경엽(KyungYup Kim),김종현(JongHyun Kim) 한국마린엔지니어링학회 2010 한국마린엔지니어링학회 학술대회 논문집 Vol.2010 No.10
In this paper, the FPGA-based SoC board (Xilinx virtex-4 ML401 EVM) is adopted to control electrical power inverter system. For marine application, its performance is shown on PC-based system for monitoring electrical characteristics of a power inverter using by the NMEA2000 protocol. This power inverter system is achieved in Real-Time monitoring and control by dual micro-processor operation on embedded FPGA-based SoC board. One micro processor is for control (control processor) electrical power inverter using by PWM signal. And the other micro-processor (communication processor) is for communication with PC-based monitoring system. The two-processor is communicating each other using by dual-portram(DPRAM). PC-based system user can control and monitor information of the electrical power inverter via NMEA2000 based communication processor. Control and monitoring information includes the inverter status and configuration. SoC board converts this information to Parameter Group Numbers (PGNs) in the NMEA2000 protocol. This system can be applied to marine power electronics for distributed power generation, transmission or regulation systems on the ship.
120 ℃ 고온 히트펌프용 자기 베어링 내장 무급유 원심 압축기의 성능평가
고희환(Heehwan Ko),정동진(Dongjin Jeoung),임세명(Semyeong Lim),김경엽(Kyungyup Kim) 대한설비공학회 2018 대한설비공학회 학술발표대회논문집 Vol.2018 No.6
This paper describes on the aerodynamic performance evaluation of the oil-free centrifugal compressor equipped with magnetic bearing for a high-temperature heat pump. Utilizing the experimental setup, we tested the centrifugal refrigeration compressor installed on closed loop high-temperature heat pump system, the test equipments and test results are presented. The required performance of the compressor was tested according to the test code like the ANSI/AHRI standard 550/590, ANSI/AHRI 540 and ASME PTC 10. The oil-free centrifugal refrigerant compressor with magnetic bearing showed superior durability than the refrigerant compressor with gas-foil bearing even in sudden and continuous surging. In order to increase the measurement accuracy, the heat balance relations were compared by measuring the refrigerant mass flow rate, pressurized water flow rate, steam generation amount, and power consumption of a motor.
120℃ 고온 히트펌프용 자기 베어링 내장 무급유 원심 압축기 운전성능 평가
고희환(Heehwan Ko),정동진(Dongjin Jeong),임세명(Semyeong Lim),김경엽(Kyungyup Kim) 대한설비공학회 2019 설비공학 논문집 Vol.31 No.2
The compressor performance includes aerodynamic performance, thermal efficiency, operation reliability and durability. its performance is tested in view of its operational problem in the field. This paper describes on the aerodynamic performance evaluation and operation reliability test of the oil-free centrifugal compressor equipped with magnetic bearing for a high-temperature heat pump. Utilizing the experimental setup, we tested the centrifugal refrigerant compressor installed on closed loop high-temperature heat pump system, the test equipments and test results are presented. The required performance of the compressor was tested according to the test code like the ANSI/AHRI standard 550/590, ANSI/AHRI 540 and ASME PTC 10. As the results of the performance test, the process of finely adjusting the angle of the vaned diffuser was repeated to improve the compressor performance and compression ratio. The oil-free centrifugal refrigerant compressor with magnetic bearing showed superior durability than the refrigerant compressor with gas-foil bearing even in sudden and continuous surging. In order to increase the measurement accuracy, the heat balance relations were compared by measuring the refrigerant mass flow rate, pressurized water flow rate, steam generation amount, and power consumption of a motor. Currently, the durability tests are being conducted in order to respond the various needs for industrial use.
FPGA를 이용한 NMEA 2000 프로토콜 변환에 관한 연구
유영호(YungHo Yu),박동현(DongHyun Park),홍지태(JiTae Hong),김경엽(KyungYup Kim),김종현(JongHyun Kim) 한국마린엔지니어링학회 2010 한국마린엔지니어링학회 학술대회 논문집 Vol.2010 No.10
NMEA 2000 is adopted as standard network for SOLAS ship by IMO. NMEA 2000 is based on CAN network exchanging data in real-time. NMEA 2000 should be able to convert and to receive various protocols. Conventional processor is difficult to converting various protocol in real-time because of possession problems on processor and memory. In this paper, multi protocol converter is implemented using FPGA for solving these problems. For receiving other protocols, USB, Ethernet and UART IP are mounted on FPGA. NMEA 2000 data is received through CAN port on FPGA, and received NMEA 2000 data is converted into other data. Then, converted data sends to PC through USB, Ethernet and UART port. NMEA 2000 monitoring program is developed to verify that data on different network are converted correctly. Converted NMEA 2000 data is confirmed by NMEA 2000 monitoring program.