电流变液与压电陶瓷复合的自耦合阻尼器

SELF-COUPLED DAMPERS COMPOSED OF ELECTRORHEOLOGICAL FLUIDS AND PIEZOELECTRIC CERAMICS

基于智能结构的思想,率先提出设计制作电流变液和压电陶瓷复合的自耦合阻尼器．相比于通常的电流变液阻尼器,该自耦合阻尼器采用压电陶瓷响应外界振动而输出高电压,激励电流变液体工作,从而省去了外加高压电源．随外作用力变化,激励电流变液的压电陶瓷电压自动改变,阻尼器具有自适应的特征,省去了通常的计算机等控制系统．研制的第1代电流变液／压电陶瓷阻尼器实现了自适应的控制过程,显示了良好的减振性能．在第2代产品中采用了新的设计,提高了阻尼器的结构稳定性和可靠性,使阻尼器整体性能得到提高．

Based on the concept of intelligent structures, self-coupled dampers composed of electrorheological （ER） fluids and piezoelectric ceramics are proposed in this paper. Unlike the conventional ER dampers, the self-coupled dampers employ piezoelectric ceramics to respond the external vibration and to provide the electric field for solidification of ER fluids. With a change in the external vibration, the electric field changes accordingly due to the piezoelectric ceramics, resulting in an adaptive control process. The self-coupled dampers have a simple and compact structure since the high voltage supply and the control system are not involved. Two generation products of the self-coupled dampers have been manufactured. Several modifications have been included in the second generation self-coupled damper and both the stability and the reliability of the damper are improved.