http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
센서 오차를 고려한 전류 적산과 확장 칼만 필터 방법의 배터리 SOC 추정 성능 비교에 관한 연구
정대웅(Dea-Ung Jeong),송하나(Ha-Na Song),윤재중(Jae-Jung Yun) 한국조명·전기설비학회 2020 조명·전기설비학회논문지 Vol.34 No.5
Coulomb counting(CC) and Extended Kalman Filter(EKF) methods are most commonly used to estimate the state of charge(SOC) of a battery. However, the SOC estimation accuracy of these two methods is affected by the sensor error because these methods estimate SOC based on the voltage and current information measured by the sensor. This paper compared and analyzed the effect of the voltage and current sensor errors on the SOC estimation accuracy of the Coulomb counting(CC) and Extended Kalman Filter(EKF) methods. To verify the effect of the voltage and current sensor errors, on the SOC estimation accuracy, the above two methods were tested at the voltage sensor error of 1% ∼ 3%, and the current sensor error of 3% when the battery SOC discharged 100% to 0%. In the Coulomb counting(CC) method, the accumulation of current sensor errors degraded the SOC estimation accuracy. Also, in the Extended Kalman Filter(EKF) method, it was confirmed that the voltage sensor error degraded the SOC estimation accuracy more than the current sensor error. The simulation results show the importance of sensor filter design and sensor fault detection in SOC estimation. estimation.
탄성계수와 프아송비 측정을 위한 Impulse Excitation 방법에 대한 신뢰성평가
이중권(JungGwon Lee),서대석,정대웅(DaeUng Jeong),박인규(InGyu Park),조인식(InSik Cho) 대한기계학회 2016 대한기계학회 춘추학술대회 Vol.2016 No.12
The elastic modulus and Poissons ratio have been measured by the tensile test with the attachment of gauge sensors. However, the simpler dynamic method has been developed by using the acoustic resonance frequency, which is much easier and more accurate than the conventional tensile test. The typical dynamic methods are (i) the Ultrasonic pulse echo method, (ii) the Resonance frequency method, and (iii) the Impulse Excitation Method. Although both the Ultrasonic echo method and the resonance frequency method have widely been used, the Impulse Excitation Method has come into the spotlight due to its simplicity and accuracy, which has also been prescribed in ASTM E1876. In this study, the practical control system has been implemented with the numerical analysis algorithm for the Impulse Excitation Method. With this technique, the dynamic elastic modulus and Poissons ratio have been measured and evaluated for structural materials such as Al6061, SUS400, and Ti6Al4V.