Magnetic Suspension Controls for a New Continuous Flow Ventricular Assist Device
Magnetic Suspension Controls for a New Continuous Flow Ventricular Assist Device
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新型连续流心室辅助装置的磁悬浮控制
DOI：
10.1097/00002480-199709000-00054
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发表时间：
1997
期刊：
影响因子：
4.2
通讯作者：
D. Olsen
中科院分区：
文献类型：
--
作者：
E. Hilton;P. Allaire;M. Baloh;E. Maslen;G. Bearnson;P. Khanwilkar;D. Olsen
研制了一种新型全磁悬浮连续流心室辅助装置（CFVAD III）。磁悬浮使离心叶轮在泵的间隙通道内居中，从而避免任何接触。这种非接触操作提供了非常高的预期机械可靠性、大间隙、低溶血、低血栓形成以及与当前脉动装置相比相对较小的尺寸。在叶轮的入口侧和出口侧上的磁致动器系统的独特配置提供了叶轮的全五轴控制和悬浮。轴承系统被分成允许三个位移轴和两个角度控制轴的段。对于第一个悬挂测试，一组分散的比例，微分和积分（PID）控制器作用沿着模态坐标被用来暂停叶轮。控制器的设计考虑到血液力作用在磁悬浮叶轮，叶轮上的不平衡力和重力载荷在各种身体运动。在最终设计中，轴承控制轴将通过流体力耦合在一起，因此电子反馈控制器是集中式多输入多输出控制器。控制系统设计必须对这些类型的外部施加的负载具有鲁棒性，以保持叶轮居中并避免血液损伤。本文讨论了CFVAD III磁悬浮控制器的动态模型、控制器和控制器实现。ASAIO Journal 1997; 43：M598-M603.
A new continuous flow ventricular assist device (CFVAD III) using a full magnetic suspension has been constructed. The magnetic suspension centers the centrifugal impeller within the clearance passages in the pump, thus avoiding any contact. This noncontact operation gives very high expected mechanical reliability, large clearances, low hemolysis, low thrombosis, and relatively small size compared with current pulsatile devices. A unique configuration of a system of magnetic actuators on the inlet side and exit sides of the impeller gives full five axis control and suspension of the impeller. The bearing system is divided into segments that allow for three displacement axes and two angular control axes. For the first suspension tests, a decentralized set of proportional, derivative, and integral (PID) controllers acting along the modal coordinates are used to suspend the impeller. The controller design takes into account the blood forces acting on the magnetically suspended impeller, the unbalance forces on the impeller and gravitational loads during various body motions. In the final design, the bearing control axes will be coupled together through fluidic forces so the electronic feedback controller is a centralized multiple input, multiple output controller. The control system design must be robust against these types of externally imposed loads to keep the impeller centered and avoid blood damage. This article discusses the dynamic model, controller, and controller implementation for the magnetic suspension controller of CFVAD III. ASAIO Journal 1997; 43:M598-M603.