Tunable Vibration Absorber Incorporating Piezoelectric-Magnetostrictive Sensoriactuator
A novel tunable vibration absorber(TVA)is developed for active absorption of vibrations in vibrating structures.The TVA consists of a piezoelectric-magnetostrictive sensoriactuator suspended in a mounting frame by two flexible beams connected to axial ends of the sensoriactuator.The sensoriactuator serves to produce an axial force for tuning of the natural frequency of the TVA,to gather the signals associated with structural vibrations and to provide a lumped damped mass for the TVA.By monitoring the sensoriactuator output voltage while adjusting its input magnetic field,the natural frequency of the TVA is tuned to the targeted resonance frequency of a structure.In this paper,the working principle,design prototype and operating performance of a 63 Hz TVA are reported.A high tunability of natural frequency of 20％ and a good sensibility of vibrations comparable to a commercial accelerometer are obtained,together with a high absorbability of vibrations of 4 dB in a steel plate-neoprene resilient mounts structure.
magnetostrictive composites piezoelectric ceramics sensoriactuators tunable vibration absorbers vibration absorption
Siu Wing Or Ching Yin Lo Helen Lai Wa Chan Ping Kong Choy
Department of Applied Physics,The Hong Kong Polytechnic University,Kowloon,Hong Kong ASM Assembly Automation Ltd.,New Territories,Hong Kong
国际会议
The World Forum on Smart Materials and Smart Structures Technology(SMSST07)(2007年世界智能材料与智能结构技术论坛)
重庆·南京
英文
2007-05-01（万方平台首次上网日期，不代表论文的发表时间）