压电陶瓷与电流变液结合的声学与振动控制系统

通过分别制备高性能压电陶瓷FD3-PZT,FD4-PZT和复合电流变液并测量它们的性能之后,研究和制作了由压电陶瓷与电流变液结合的一种新型声学与振动控制系统(在该系统中的压电陶瓷与电流变液之间连接有一高压延迟电路).当外界施加一个瞬时冲击力作用于该新型声学和振动控制系统中的压电陶瓷上时,压电陶瓷由于压电效应产生瞬时高压(d-c current)输入复合电流变液,电流变液在短时由于其具有的流变性(其电致流变性可逆)而迅速由液态变为固态,从而抵消了外来的瞬时冲击力.该新型声学与振动控制系统在振动控制和声学方面极有应用前景,例如抗(防)次声、声震波和爆炸冲击波的危害以及用于制造高效防弹衣、防护头盔(安全帽)等;在声学方面可制备新型电控激励器、制动器、强振隔离体、无后坐力装备及各种抗震、减振、防噪所需装置等.

Acoustical and vibrational control system combining piezoelectric ceramics and electrorheological fluids

After preparation of the high-performance piezoelectric ceramics,FD3-PZT,FD4-PZT,and composite electrorheological fluids respectively,and measurement of their work properties,a novel acoustical and vibrational control system combining the piezoelectric ceramics and the electrorheological fluids(a high-voltage delay circuit is used to connect the piezoelectric ceramics and the electrorheological fluids in this sytem)is designed and prepared for this study.In the new and unique acoustical and vibrational control system,when piezoelectric ceramic elements are applied to produce a transient impulsion force,an output high voltage(d-C current)is set to the electrorheological fluid for a very short duration,where it is simultaneously changed from liquid phase into solid phase to counteract the impulsion force. The novel acoustical and vibrational control system can resist the destructions of shock wave, infrasonic sound wave, acoustic shock waves, and explosive waves in the vibration control, and can be used to make new and highly effective bulletproof vest and bulletproof helmet (safety helmet).In the acoustic applications, proposed system can be utilized to prepare anti-seismic structure, reducer, damper, and recoilless weapons (equipment), and varied shock-absorber, etc.