【摘要】 形状记忆合金（Shape memory alloy,SMA）作为智能驱动材料之一，因具有变形量大、变形方向自由度大且变形可短时急剧发生等特点得以广泛开发应用。目前关于SMA的应用主要围绕其形状记忆特性与伪弹性特性，且皆与温度直接相关，但较低的响应频率限制了其适用范围。基于此，本文在聚偏氟乙烯（Polyvinylidene fluoride,PVDF）中引入锆酸铅钡(Pb_0.8Ba_0.2ZrO₃,PBZ)纳米陶瓷纤维，采用溶液流延法将其涂覆于NiTi片表面制备PBZ/PVDF@SMA片式复合弯曲驱动器，室温下通过PBZ/PVDF薄膜的电卡效应加热及冷却SMA片式弯曲驱动器，并与传统电流加热与自然冷却SMA方式作对比，旨在缩短SMA片式弯曲驱动器循环周期，同时获得较高的位移输出，通过仿真模拟揭示PBZ/PVDF复合薄膜加热与冷却SMA片式弯曲驱动器过程。更多还原

【Abstract】 As one of the smart actuator materials,shape memory alloy （SMA） has been widely developed and used with the characteristics of large deformation,large freedom of deformation direction,and the fact that the deformation can occur dramatically in a short period of time.The current application of SMA mainly focuses on its shape memory properties and pseudo-elastic properties,and both are directly related to temperature,but the low response frequency limits its application range.Based on this,lead barium zirconate(Pb_0.8Ba_0.2ZrO₃,PBZ) nanoceramic fibres are introduced into polyvinylidene fluoride （PVDF）,which are coated on the surface of NiTi sheet to prepare PBZ/PVDF@SMA sheet composite bending actuators by solution casting method.At room temperature,heating and cooling of SMA sheet bending actuators by the electrocaloric effect of PBZ/PVDF films,and comparing it with conventional methods of current heating and natural cooling SMA,aims to shorten the cycle time of the SMA sheet actuator and obtain a higher displacement output at the same time.The process of heating and cooling SMA sheet bending actuator with PBZ/PVDF composite film is simulated by simulation software.更多还原