SMA电机的不同控制方法比较  

Compare of Various Control Methods of SMA Motor

作　　者：杨凯[1] 辜承林[1] 

机构地区：[1]华中科技大学,湖北武汉430074

出　　处：《微特电机》2005年第5期41-43,46,共4页Small & Special Electrical Machines

摘　　要：SMA(ShapeMemoryAlloy)电机具有较高功率重量比和基于电阻应变关系模型的自传感功能,在小型化应用领域很有前景。该电机的主要不足是冷却响应较慢,特性曲线中存在明显迟滞现象,给精确控制带来了很大的困难文章研究了结合外部传感和基于电阻应变模型预测位置的不同控制方法,分析了电阻应变模型与外部条件和应力的关系。Research on the use of shape memory alloy actuators for miniature applications is interesting due to their high power-to-weight ratio and self-sensing capabilities based on resistance-strain models.Hysteresis behaviour in addition to a slow cooling response makes the control a major problem to be addressed.The applicability of different control approaches in combination with both external sensing and resistance-strain model based prediction of the actuator position are investigated.The problem of model dependence on external conditions and applied load is also outlined.

关 键 词：形状记忆合金 电阻反馈 基于模型控制 微电机 

分 类 号：TM35[电气工程—电机]