Application of extremum seeking control to turbodynamic blood pumps.
Application of extremum seeking control to turbodynamic blood pumps.
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极值搜索控制在涡轮动力血泵中的应用。
DOI：
10.1097/mat.0b013e31806ada0a
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发表时间：
2007
期刊：
影响因子：
--
通讯作者：
Gwak,Kwan-Woong
中科院分区：
文献类型：
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作者：
Gwak,Kwan-Woong
目前临床上用于治疗终末期心力衰竭的心室辅助装置需要响应性和可靠的控制，以适应身体不断变化的需求。然而，由于不同的生理条件和有限的使用传感器来检测血流动力学负荷和吸力，很难适当地控制泵的速度。作者介绍了一种自适应泵速控制器，以提供最大的心脏灌注，同时避免心室吸入。该控制器基于极值搜索控制（ESC）算法和斜率搜索控制（SSC）算法，找到并跟踪给定代价函数的未知和移动峰值点。控制器使用体内数据进行验证，使用时间平均舒张泵流量作为ESC/SSC的成本函数。初步结果表明，ESC/SSC作为生理泵转速控制器的应用是成功的。
Ventricular assist devices now clinically used for treatment of end-stage heart failure require responsive and reliable control to accommodate the continually changing demands of the body. However, due to the varying physiologic conditions and the limited use of the sensors to detect hemodynamic load and suction, it is difficult to control pump speed appropriately. The author introduces an adaptive pump speed controller to provide maximum cardiac perfusion while avoiding ventricular suction. The controller is based on an extremum seeking control (ESC) algorithm and a slope seeking control (SSC) algorithm, which find and track unknown and moving peak points of a prescribed cost function. The controller was validated with in vivo data using time-averaged diastolic pump flow as the cost function for ESC/SSC. Initial results demonstrate the successful application of ESC/SSC as a physiologic pump speed controller.