Signal separation technology for diphase opposition giant magnetostrictive self-sensing actuator

2010年第5卷第2期

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《机械工程前沿（英文）》 >> 2010年第5卷第2期 doi: 10.1007/s11465-010-0001-5

Signal separation technology for diphase opposition giant magnetostrictive self-sensing actuator

1.College of Mechanical Engineering and Applied Electronics Technology, Beijing University of Technology, Beijing 100022, China; 2.College of Mechanical and Electrical Engineering, China University of Petroleum, Beijing 102249, China;

发布日期： 2010-06-05

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摘要

The structure and principle of a new type of a diphase opposition giant magnetostrictive self-sensing actuator is introduced. A bridge analysis model based on variable inductance is established. Dynamic balance separation technology for the giant magnetostrictive self-sensing actuator comes true by the least means square (LMS) self-adapting algorithm. The scheme design of one important part of the circuit with the real-time separation circuit of the dynamic balance signal based on a digital signal processor is obtained. The part of the signal separated circuit is designed, which includes logarithmic-antilog practical multiplication circuit, amplifying circuit, filter circuits, and amplifier circuit. Based on the embedded system simulation software—PROTUES, the simulation effect of the circuit that separates the sensing signal from the mixed signals is obvious, which indicates that the circuit can rapidly and stably work. Moreover, the structure is simple, reliable, and meets the practical requirement.

关键词

giant magnetostrictive material (GMM) self-sensing actuator ; least means square (LMS) self-adapting algorithm ; design of self-adaptive circuit