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17 May 2005 Use of magnetorheological elastomer for smart piezoelectric power actuator design and signal processing
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This paper reviews the investigations of introducing magnetorheological elastomer (MRE)-based technologies to the design of smart electronic devices. Piezoelectric power actuators are required to operate at a resonant state in order to deliver maximum mechanical energy to loads. Owing to the field-dependent dynamic flexural rigidity of MRE-based structures, power actuators utilizing such structures exhibit the capability of compensating the change of the loads and keeping the resonant frequency at a fixed value. Four kinds of bender configurations for such smart actuators will be reviewed. They are: a cantilever suspended by an MRE patch at its free end, a single-layer MRE-based sandwich beam surface-bonded by piezoelectric patches, a multi-layer MRE-based sandwich beam surface-bonded by piezoelectric patches, and an inserts reinforced MRE-based sandwich beams surface-bonded by piezoelectric patches. Their driving capability and field-controllable capability are discussed in a detail. In addition, MRE-based structures are extended to propose linear time-variant systems for time-frequency signal processing. The system function is presented and the Wigner-Ville distribution is used to analyze the time-frequency distribution of the time-delayed response of the system. The system is proved to be a damped-vibration system with field-controllable resonant frequencies. Due to the field-controllable time-frequency pattern of the time-delayed response, the system can be used for data encryption and signal modulation.
© (2005) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
G. Y. Zhou and Q. Wang "Use of magnetorheological elastomer for smart piezoelectric power actuator design and signal processing", Proc. SPIE 5764, Smart Structures and Materials 2005: Smart Structures and Integrated Systems, (17 May 2005);


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