基于SMA的差动式变体机翼后缘驱动器研究  

Differential SMA actuator in trailing edge of morphing wing

作　　者：刘俊兵[1,2] 王帮峰[3] 芦吉云[3] 胡玮[1,2] 

机构地区：[1]南京航空航天大学航空宇航学院,江苏南京210016 [2]南京航空航天大学机械结构力学及控制国家重点实验室,江苏南京210016 [3]南京航空航天大学民航学院,江苏南京210016

出　　处：《兵器材料科学与工程》2015年第4期14-18,共5页Ordnance Material Science and Engineering

基　　金：国家自然科学基金资助项目(51075207)

摘　　要：以形状记忆合金卷簧为驱动源,设计了一种变体机翼后缘驱动器。驱动器由两个SMA卷簧通过差动方式提供正反扭矩,通过蜗轮蜗杆放大扭矩,产生较大的输出。建立了差动式SMA驱动器的理论模型,并给出推导过程,从理论上推导出该驱动器分别在空载和加载下的转角和最大输出扭矩的关系,制作了模型并进行空载和加载试验。通过实验测得驱动器在空载条件下最大转角为54°,加载条件下最大转角为53.7°,能承受的最大扭矩为0.646 N·m,验证了该驱动器的负载能力和实用性,达到了驱动机翼后缘大角度连续偏转的目的。By taking shape memory alloy spiral springs as driving source,the actuator in the trailing edge of morphing wing was designed. Positive and negative torque were provided by two SMA spiral springs in differential mode,and were enlarged by the worm gear,which provided a higher output. A theoretical model of differential SMA actuator was established,and theoretical inference was presented. The relationship of angle and maximum output torque was calculated under both unload and load conditions. In the end,SMA actuator model was made,and experiments were carried out under both unload and load conditions.The experiments show that the maximum angle is 54° under unload condition,the maximum angle is 53.7° under load condition,and the maximum load is 0.646 N·m,which verifies the load capacity and practicability. The actuator achieves the purpose of large angle deflection continuously of driving trailing edge of morphing wing.

关 键 词：形状记忆合金 蜗轮蜗杆 差动 机翼后缘 

分 类 号：TB381[一般工业技术—材料科学与工程] TH132.4[机械工程—机械制造及自动化]