论文部分内容阅读
基于磁控形状记忆合金(magnetically controlled shape memoryalloy,MSMA)在磁场作用下变形并具有形状记忆功能的特性,提出一种通过超越离合器将MSMA元件产生的直线运动变为旋转运动的执行器结构,在永磁体偏置磁场基础上,通过改变控制磁场励磁电流的大小和频率可实现转速控制。采用有限元法进行MSMA执行器的磁场分析与控制特性仿真,分析旋转机构的机械特性,推导了位移与转速表达式。设计并研制MSMA旋转执行器试验样机,将试验结果与理论计算值进行对比,并分析二者存在差异的原因。样机试验结果表明MSMA旋转执行器机理和设计方法可行。
Based on the characteristics of magnetically controlled shape memory alloy (MSMA) deforming under the action of magnetic field and having the shape memory function, an actuator structure is proposed that turns the linear motion generated by the MSMA element into a rotational motion through a overrunning clutch. Based on the bias magnetic field of the permanent magnet, speed control can be realized by changing the magnitude and frequency of the control field excitation current. The finite element method is used to simulate the magnetic field and control characteristics of MSMA actuator. The mechanical characteristics of the rotating mechanism are analyzed and the displacement and rotational speed expressions are derived. Design and development of MSMA rotary actuator test prototype, the test results and theoretical calculations were compared, and analyzed the difference between the two reasons. The prototype test results show that the MSMA rotary actuator mechanism and design method is feasible.