지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술대회자료
- 저자정보
- 발행연도
- 2009.8
- 수록면
- 3,335 - 3,338 (4page)
이용수
초록· 키워드
오류제보하기
We developed a centrifugal blood pump (CBP), incorporating a radial-controlled magnetic bearing (MB) and a brushless DC motor to assist the failing heart ventricle. To control the flow through the CBP, real-time measurement of pulsatile flow is required. However, the use of conventional flow sensors is not desirable due to issues of compactness and durability. The radial thrust acting on a magnetically levitated impeller depends on the pump flow. In this study, we present a method for estimating pulsatile flow during ventricular assistance, based on the radial thrust estimated by a disturbance force observer of the MB. To design this observer, parameters of the dynamic model of a magnetically levitated impeller were identified underdifferent flow conditions, assuming the density and viscosity of water to be constant. The disturbance force observers were designed based on linear models that were obtained for a given rotational speed. The relationship between pumpflow and radial thrust was first identified experimentally under non-pulsatile flow conditions. Then, using this relationship and the measured radial thrust, the pump flow was estimated under pulsatile flow conditions and a high correlation was achieved between the measured and the estimated flows.
목차
Abstract
1. INTRODUCTION
2. ESTIMATION PROCESS
3. EXPERIMENTAL SETUP
4. EXPERIMENTAL RESULTS
5. DISCUSSION
6. CONCLUSION
REFERENCES
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UCI(KEPA) : I410-ECN-0101-2014-569-000768460