无阀流体回路在压缩作动器冲击激励下的动态响应
Dynamical Responses of a Valveless Fluid Loop Excited by the Impact of a Compression Actuator
摘要：
无阀泵送有助于各种生物体和工程系统中的流体输送。在以前的工作中，为了研究致动器对无阀泵送的影响，我们构建了一个闭环系统的分段线性集中参数模型，该模型由两个刚性管连接的两个可膨胀的流体储存器组成。该工作的初步渐近和数值结果表明，系统动力学是相当丰富和复杂的，强烈依赖于驱动器的驱动频率（周期性地压缩可膨胀的水库之一）和其他系统参数。在这里，上述模型进行了更全面的数值研究，以澄清有多少不同类型的系统响应可以激发，并找到其中存在的每种类型的参数边界。此外，通过检查多个特征相位（例如，致动器与其作用的可膨胀储液器碰撞或分离的压缩循环的相位）的驱动频率依赖性，识别不同类型的系统响应之间的相互关系。
英文摘要：
Valveless pumping assists in fluid transport in various organisms and engineering systems. In a previous work, to study the actuator impact effects on valveless pumping, we constructed a piecewise-linear lumped-parameter model for a closed-loop system, which consists of two distensible fluid reservoirs connected by two rigid tubes. The preliminary asymptotic and numerical results of that work indicated that the system dynamics is rather rich and complex, and strongly depends upon the driving frequency of the actuator (which periodically compresses one of the distensible reservoirs) and other system parameters. Here, a more comprehensive numerical study on the aforementioned model is carried out, so as to clarify how many different types of system responses can be excited, and to locate the parameter boundaries within which each type exists. Moreover, by examining the driving-frequency dependences of a number of characteristic phases (such as the phase of the compression cycle at which the actuator collides with or separates from the distensible reservoir it acts upon), the interrelations between different types of system responses are identified.
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