【摘要】 目的研究用于左心室辅助装置(LVAD)的无磨损的血泵转子系统,为第三代人工心脏即轴流血泵柔性转子建立数学模型并进行控制仿真分析。方法将血泵转子悬浮于主动式磁轴承(AMB)系统中,利用线性化方法建立系统简单的线性数学模型,利用状态变量反馈(SVFB)方法、全次元观测器(observer)设计和线性二次控制器(LQR)对系统进行控制仿真。结果与讨论人工心脏血泵转子系统对干扰的稳定延迟时间为350ms,稳态误差接近0,无超调现象,满足血泵转子系统设计要求。更多还原

【Abstract】 Objective To deal with a rotor system of a wear-free heart pump used in a left ventricular assist device(LVAD),which is a basic research for the third generation artificial heart(AT).This study computes the mathematical modeling to the flexible rotor in the axial flow pump and simulates the control strategy to the system.Method A flexible rotor with translational and slop motions suspended in an active magnetic bearing(AMB) system.A linear mathematical modeling of the dynamic behaviour of the rotor is pointed out using linearization approximation laws.A control strategy is introduced using state variable free back(SVFB),full-order observer and linear quadratic regulator(LQR) methodologies.Conclusion and Discussion In the simulation,the settling time is 350ms,stead state error goes to zero,and no overshoot there is.The satisfied simulation shows the efficiency of the control strategy and validates the method applied to the pump.It is quiet a great progress for the third generation artificial heart in further study.更多还原