Vibration Modeling and design of piezoelectric floating mass transducer for Implantable middle ear hearing devices
Vibration Modeling and design of piezoelectric floating mass transducer for Implantable middle ear hearing devices
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DOI：
10.1093/ietfec/e90-a.8.1620
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发表时间：
2007-08-01
影响因子：
0.5
通讯作者：
Cho, Jin-Ho
中科院分区：
文献类型：
--
作者：
Hong, Eung-Pyo;Kim, Min-Kyu;Cho, Jin-Ho
本文提出了一种用于植入式中耳助听器（IMEHDs）的压电悬浮质量换能器（PFMT），并对其建模和设计进行了研究。该换能器由PMN-PT多层压电陶瓷驱动器、弹性材料和金属外壳组成，可植入中耳内。所提出的换能器具有简单的结构，从压电致动器产生的力被有效地传递到中耳的听小骨。为了分析换能器的振动特性，将换能器简化为一个简单的力学模型，考虑了砧骨的质量。通过计算机仿真计算了模型的振动位移，并与实验结果进行了验证。结果表明，所设计的PFMT可以允许植入中耳腔，并提供足够高的输出超过100 nm的振动位移。此外，还验证了通过调整换能器的金属外壳尺寸和弹性材料可以控制PFMT的振动特性。
In this paper, a simple piezoelectric floating mass transducer (PFMT) for implantable middle ear hearing devices (IMEHDs) is proposed and its modeling and designing are studied. The transducer which can be implanted in the meddle ear consists of a PMN-PT multi-layered piezoelectric actuator, an elastic material, and a metal case. The proposed transducer has a simple structure and the force generated from the piezoelectric actuator is efficiently transferred to the ossicles of the middle ear. For the analysis of the vibration characteristics, the transducer attached on the ossicle is simplified into a simple mechanical model considering the mass of an incus. And the vibration displacement of the model is calculated using computer simulation and verified by the experimental results. It is shown that the designed PFMT can allow implantation in the middle ear cavity and provide a sufficiently high output of more than 100 nm of vibration displacement. Plus, it is verified that the vibration characteristics of PFMT can be controlled through adjustment of the metal case size and the elastic material of the transducer.