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An irreversible port-Hamiltonian model for a class of piezoelectric actuators ?

机译:一类压电致动器的不可逆转端口 - 哈密顿模型

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An irreversible port-Hamiltonian system formulation of a class of piezoelectric actuator with non-negligible entropy increase is proposed. The proposed model encompasses the hysteresis and the irreversible thermodynamic changes due to mechanical friction, electrical resistance and heat exchange between the actuator and the environment. The electromechanical dynamic of the actuator is modeled using a non-linear resistive-capacitive-inductor circuit coupled with a mass-spring-damper system, while the non-linear hysteresis is characterized using hysterons. The thermodynamic behavior of the model is constructed by making the electromechanical coupling temperature dependent, and by characterizing the entropy produced by the irreversible phenomena. By means of numerical simulations it is shown that the proposed model is capable of reproducing the expected behaviors and is in line with reported experimental results.
机译:提出了一类具有不可忽略的熵增加的一类压电致动器的不可逆转的端口 - 汉密尔顿系统配方。 所提出的模型包括由于机械摩擦,电阻和致动器和环境之间的热交换而导致的滞后和不可逆的热力学变化。 致动器的机电动态使用与质量弹簧阻尼系统联接的非线性电阻电容电感电路进行建模,而非线性滞后的特征在于使用静脉。 通过使机电耦合温度依赖性构成模型的热力学行为,并通过表征不可逆转现象产生的熵。 通过数值模拟,示出了所提出的模型能够再现预期行为,并与报道的实验结果一致。

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