摘要
介绍了利用国产超磁致伸缩材料研制的电—机转换器结构与工作原理,利用磁压方程和磁路原理,导出了其位移和力输出特性的静态数学模型.构建了GMM转换器的静态输出特性的实验测试系统,实验研究了GMM转换器的输出位移、输出力的静态和滞回特性.实验结果表明:GMM转换器具有较大的输出位移和输出力;施加适当的预压力和偏置磁场可增大GMM转换器线性输出位移;驱动电流在0.5～1.25A范围内,可有效减小输出位移的非线性.实验测得的原始输出数据,为进一步将其应用于两级电液伺服阀提供了设计和实验依据.
The structure and principle of actuator with new GMM home made are presented.Its models on static output characteristics of displacement and force are established. Experimental system is also constructed to test static output characteristics of displacement and force. The output performance of static displacement、force and hysteretic is done under typical working conditions. The results show that the GMM actuator for servo valve has giant output displacement and great output force; a reasonable bias magnetic field and an optimal pre-pressure is able to increase the linear displacement of the GMM actuator; in order to reduce non-linearity of the actuator’s output displacement, it is preferable to the driving current within 0.5~1.25 A. And theoretical basis is presented to further introduce the GMM actuator into two-stage electrohydraulic servo valve.
出处
《传感技术学报》
CAS
CSCD
北大核心
2007年第10期2342-2345,共4页
Chinese Journal of Sensors and Actuators
基金
国家自然科学基金资助(59835160)
安徽省自然科学基金资助(070414268x)
关键词
超磁致伸缩
电-机械转换器
静态特性
输出位移
输出力
giant magnetostrictive
actuator
static characteristics
output displacement
output force
