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Jia Zhenyuan
School of Mechanical Engineering,
Dalian University of Technology,
Dalian 116024, China
Yang Xing
Department of Precision Instruments
and Mechnology,
Tsinghua University,
Beijing 100084, China
Shi Chun
Guo Dongming
School of Mechanical
Engineering,
Dalian University of Technology,
Dalian 116024, China
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DEVELOPMENT OF THE CONTROL
METHODOLOGY OF THE GIANT
MAGNETOSTRICTIVE ACTUATOR
BASED ON MAGNETIC FLUX
DENSITY*
Abstract:
According to the principle of the magnetostriction generating mechanism, the control model of giant magnetostriction material based on magnetic field and the control method with magnetic flux density are developed. Furthermore, this control method is used to develop a giant magnetostrictive micro-displacement actuator (GMA) and its driving system. Two control methods whose control variables are current intensity and magnetic flux density are compared with each other by experimental studies. Finally, effective methods on improving the linearity and control precision of micro-displacement actuator and reducing the hysteresis based on the controlling magnetic flux density are obtained.
Key words: Giant magnetostriction Magnetic flux density Control method Micro-displacement actuator
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