MSMA自感知执行器的优化设计及试验验证

Optimization Design and Experimental Verification on MSMA Self-sensing Actuator

以磁控形状记忆合金为核心元件的自感知执行器是一种能够自我感知并自主响应的执行器,其具有很高的灵活性和智能性。针对现有自感知执行器的结构进行了优化设计。基于电磁理论分析和数学分析软件,以减小自感知执行器的磁路磁阻和励磁功率、增大气隙磁感应强度为优化目标,对自感知执行器的铁心和永磁体尺寸进行了优化设计;优化后的自感知执行器磁路磁阻减小,气隙磁感应强度增大,磁场分布均匀;通过搭建试验平台对自感知执行器的性能进行试验测试和分析,结果表明:在外加磁场大小相同和励磁线圈匝数相同时,优化后的自感知执行器与优化前的自感知执行器相比可显著提高感应电压峰-峰值并降低励磁功率,验证了自感知执行器结构优化设计的正确性与合理性。

The magnetically controlled shape memory alloy as the key element is a kind of self-sensing and self-responding actuator,which has high flexibility and intelligence.The structure of the existing self-sensing actuator is optimized.Based on electromagnetic theory analysis and mathematical analysis software,the core and permanent magnet sizes of the self-sensing actuator are optimized to reduce the magnetic resistance and excitation power of the self-sensing actuator and increase the magnetic induction intensity of the air gap.After optimization,the magnetic resistance of the self-sensing actuator decreases,the magnetic induction intensity of the air gap increases,and the magnetic field distribution is uniform.By building a test platform,the performance of the self-sensing actuator is tested and analyzed,the results show that when the applied magnetic field is the same and the number of turns of excitation coil is the same,compared with the self-sensing actuator before optimization,the optimized self-sensing actuator can significantly increase the induced voltage peak-to-peak and reduce the excitation power,which verifies the correctness and rationality of the structural optimization design of the self-sensing actuator.