http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : 박용화 ( Yong Hwa Park ) (검색결과 78 건)
- 무료
- 기관 내 무료
- 유료
-
Feedback Control for Expanding Range and Improving Lineraity of Microaccelerometers
박용화,박상준,최병두,고형호,송태용,임근원,허건수,박장현,조동일,Park, Yong-Hwa,Park, Sang-Jun,Choi, Byung-Doo,Ko, Hyoung-Ho,Song, Tae-Yong,Lim, Genu-Won,Huh, Kun-Soo,Park, Jahng-Hyon,Cho, Dong-il Institute of Control 2004 제어·로봇·시스템학회 논문지 Vol.10 No.11
This paer presents a feedback-controlled, MEMS-fabricated microaccelerometer($\mu$XL). The $\mu$XL has received much commercial attraction, but its performance is generally limited. To improve the open-loop performance, a feedback controller is designed and experimentally evaluated. The feedback controller is applied to the x/y-axis $\mu$XL fabricated by sacrificial bulk micromachining(SBM) process. Even though the resolution of the closed-loop system is slightly worse than open-loop system, the bandwidth, linearity, and bias stability are stability are significantly improved. The noise equivalent resolution of open-loop system is 0.615 mg and that of closed-loop system is 0.864 mg. The bandwidths of open-loop and closed-loop system are over 100Hz. The input range, non-linearity and bias stability are improved from $\pm10\;g\;to\;\pm18g$, from 11.1%FSO to 0.86%FSO, and from 0.221 mg to 0.128 mg by feedback control, respectively.
-
-
-
물 부족 문제의 해결을 위한 건축물 단위의 물재이용 시설 확대 방안
박용화(Yong-hwa Park),심인태(In-tae Shim),김현진(Hyun-jin Kim),장암(Am Jang) 대한환경공학회 2017 대한환경공학회지 Vol.39 No.7
본 연구는 환경부 시범사업으로 진행된 수원시 물 재이용(중수도)시설물 설치사업으로 설치된 물재이용시설을 통하여 건축물 단위의 물재이용을 통한 물 부족 문제 해결 가능성을 살펴보았다. 개별 건축물 단위의 물재이용이 이루어지며 도시의 물 수요를 최대 25%까지 줄일 수 있다. 이는 우리나라의 수자원 부족 문제를 해결할 수 있는 수준이다. 하지만 개별건축물 단위의 물 재이용 시설을 활성화하려면 사용자의 중수도 거부감 해소와 경제성 문제를 해결하여야 한다. 중수도 거부감 해소는 MBR 공정과 AOP 공정을 연계 하였을 경우 해결 가능하다. MBR 공정과 AOP 공정을 연계하여 운영할 시 사용자들은 상수도와 중수도의 수질 차이를 느끼지 못하는 것으로 나타났다. 경제성 문제는 건설비와 운영비를 고려할 경우 시설용량 100톤/일 이상, 운영비만 고려할 경우 15톤/일 이상일 경우 상 · 하수도요금 수준에서 해결이 가능하다. 더 나아가 사회적 편익비용까지 고려할 시 150톤/일 이상부터는 수익이 창출되는 것으로 나타났다. This study examined the possibility of solving the water shortage problem through the water reuse of buildings through the Suwon water reuse (greywater) facility installation project conducted as a pilot project of Ministry of Environment. Water reuse of individual building units can reduce city water demand by up to 25%. This is a level that can solve the water shortage problem in Korea. However, in order to revitalize the water reuse facilities of individual buildings, it is necessary to solve the problem of the user"s rejection of the greywater and the economical problems. The resolution of the user"s rejection can be solved by linking the MBR process with the AOP process. When the MBR process and the AOP process are operated in conjunction with each other, it is found that the users do not feel the water quality difference with the tap water. Economical problems can be solved at the water rate levels when the facility capacity is over 100 ton/day considering the construction cost and the operation cost, and when the operation cost alone is over 15 ton/day. Furthermore, when considering the social benefit cost, it is found that profit is generated from 150 ton/day.
-
-
-
박용화(Yong-Hwa Park) 대한기계학회 2016 대한기계학회 춘추학술대회 Vol.2016 No.12
Pursuing smart machines that recognize humans intend and event autonomously, we focus on the study of interactions between human and machines in mechanical, optical and electrical ways. This study includes researches on three-dimensional scene and event recognition for autonomous vehicle and robots (vision), voice recognition and highdynamic range directional sound transducers (sound), and biometric sensors for monitoring of health condition by means of vibration and ultrasound transducers (touch). 3D scene recognition is a key technology toward commercialization of autonomous vehicle and smart robots. By means of this groups novel signal processing methodology combined with microsystems/ultrasound devices, high-definition, environmentally robust 3D scene recognition is enabled. This will provide accurate 3D recognition performance with compact, low-cost solution. The technical aspect of operating principle in view of mechanical signal processing will be highlighted and presented.
-
-
-
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
