Design, Sensing and Control Development for the Low Power Consumption Pulsatile Left Ventricular Assist Device Pump

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Project title

Code/計畫編號

MOST106-2221-E019-052

Translated Name/計畫中文名

低功耗脈動式左心室輔助器泵浦設計與感測控制

Project Coordinator/計畫主持人

Shu-Sheng Lee

Funding Organization/主管機關

National Science and Technology Council

Co-Investigator(s)/共同執行人

余興政
翁維珠

Department/Unit

Department of Systems Engineering and Naval Architecture

Website

https://www.grb.gov.tw/search/planDetail?id=12486995

Year

2017

Start date/計畫起

01-08-2017

Expected Completion/計畫迄

01-07-2018

Bugetid/研究經費

757千元

ResearchField/研究領域

機械工程

"根據國際上的相關研究指出，左心室輔助器在臨床醫療上的使用，可提升心臟病重症病患存活率，延長等待心臟移植的時間，其餘相關病症上的使用越來越受重視。在不同的左心室輔助器中，以脈動式泵浦為基礎的左心室輔助器產生的脈動流與人體循環方式最為相近，有助患者心臟機能的恢復。本計畫根據過去8 節線圈及24 線圈泵浦研究結果，針對可應用於心室輔助器的需求，每分鐘40 下至120 下的脈動，液體流量從每分鐘3 公升至7 公升，進行電磁線圈驅動泵浦效能提升、功率消耗減少、泵浦活塞衝程縮減、以及控制系統縮小化之改良研究，完成一套低功耗脈動式心室輔助器泵浦設計與感測控制。本計畫將進行泵浦最佳設計參數研究、活塞位置感測以及活塞運動控制等項目分別進行。使用模擬軟體分析不同數量之線圈通電以及電流在不同方向的磁場強度分佈狀況，進而設計出最理想的泵浦機械構造。配合此泵浦的設計特性，利用已開發的24 節線圈磁驅動往復式泵浦進行活塞的脈波寬度調變控制技術設計，以及無感測器活塞位置訊號讀取電路及程式設計，完成活塞運動的即時回饋控制，在應用於本計畫完成之泵浦機械構造，並以簡易流道測試驗證泵浦推動流體流量能力，以達成減少功率消、耗縮小化機構及控制系統的低功耗脈動式心室輔助器泵浦。" "The left ventricular assist devices (LVAD) as permanent therapy for advanced heart failure can dramatically reduce the mortality of the patients who have severe heart failure according to related study report such as the landmark Randomized Evaluation of Mechanical Assistance for the Treatment of Congestive Heart Failure (REMATCH) randomized trial and the sequence journal papers. The implantation of LVAD can prolong the patients’ waiting time for the matched donated heart and the therapy catches more and more attentions. The pulsatile-flow device among different types of LVADs can generate the flow pulse similar the human blood circulation system and this is very helpful to the patients’ heart function recovery. In this proposal, we are going to develop a low power consumption pump with miniature control circuits that is suitable for LVAD application. The piston reciprocating movement inside the pump can reach 40 to 120 times per minute and can pump the liquid volume flow rate from 3 to 7 liters per minute. There are three development tasks: the optimal pump capability and dimension design, the PWM technology control for piston control, and the piston position sensorless sensing. The simulation software ANASYS will be used to analysis the magnetic distribution while the different direction current applied to different coils. The optimal pump schematic will be designed accoring to the simulaiton. The PWM control technology for the 24 coils reciprocating pump will be developed first, and the piston position signals will be used as the feedback signal to the control subsystem. While the PWM feedback control system is developed well, it will be applied to the new design low power consumption pulsatile pump. The pump capability will be tested by simple flow tube system to verify the pumping flow rate and to complete the design, sensing and control development for a LVAD use pump."

Keyword(s)

左心室輔助器
低功耗
電磁泵浦
活塞位置感測
脈波寬度調變
無感測器感測
left ventricular assist device
low power consumption
electric magnetic force driving pump
position sensing
pulse width modulation technique
sensorless sensing

DSpace CRIS

Design, Sensing and Control Development for the Low Power Consumption Pulsatile Left Ventricular Assist Device Pump

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