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首页> 外文会议>2010 IEEE/ASME International Conference on Advanced Intelligent Mechatronics >Temperature-dependent Ionic polymer-metal composite (IPMC) sensing dynamics: Modeling and inverse compensation
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Temperature-dependent Ionic polymer-metal composite (IPMC) sensing dynamics: Modeling and inverse compensation

机译：温度相关的离子聚合物-金属复合材料（IPMC）感测动力学：建模和逆补偿

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摘要

Ionic polymer-metal composites (IPMCs) have intrinsic sensing capabilities. Like many other sensing materials, however, IPMC sensors demonstrate strong temperature-dependent behaviors. In this paper we present the first systematic studies on temperature-dependent IPMC sensing dynamics. A cantilevered IPMC beam, soaked in a water bath with controlled temperature, is excited mechanically at its tip at frequencies of 10–100 Hz. The empirical frequency response of the sensor, with the tip displacement as input and the short-circuit current as output, shows clear dependence on the bath temperature. The sensing dynamics is modeled with a transfer function with temperature-dependent coefficients. By fitting the values of the coefficients at a set of test temperatures, we capture the temperature-dependence of the coefficients with polynomial functions, which can be used to predict the sensing dynamics at other temperatures. We further investigate the inversion of the sensing dynamics, for extracting the mechanical signal given the sensor output. In particular, a stable but noncausal inversion algorithm is applied to deal with the unstable zeros of the original sensing dynamics. Experimental results with both harmonic stimuli and free vibrations have validated the effectiveness of the proposed modeling and inversion schemes for IPMC sensors under different temperatures.
机译：离子聚合物金属复合材料（IPMC）具有内在的传感功能。但是，与许多其他传感材料一样，IPMC传感器也表现出很强的温度依赖性行为。在本文中，我们提出了有关温度相关的IPMC传感动力学的第一个系统研究。在温度受控的水浴中浸泡的IPMC悬臂梁在其尖端以10–100 Hz的频率被机械激发。传感器的经验频率响应，尖端位移作为输入，短路电流作为输出，显示出对熔池温度的明显依赖。感测动力学通过传递函数建模，该传递函数具有与温度相关的系数。通过在一组测试温度下拟合系数的值，我们利用多项式函数捕获了系数的温度依赖性，该多项式函数可用于预测其他温度下的感测动态。我们进一步研究了感应动力学的反演，以便在给定传感器输出的情况下提取机械信号。特别是，采用稳定但无因果的反演算法来处理原始感测动力学的不稳定零点。谐波激励和自由振动的实验结果验证了所提出的IPMC传感器在不同温度下建模和反演方案的有效性。

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