压电类智能梁元的优化布局

分别对具有无限小长度驱动器的悬臂和简支智能梁的一阶模态和二阶模态进行了具体的分析和计算,确定了驱动器在梁元中的最优布局,总结了有关驱动器在梁元中布局的一些基本性质,并从解析的角度对驱动器的最优布局点给予解释.由于以上有关驱动器最优布局的分析是在忽略驱动器的长度的假设基础上进行的,所以又对有限长度的驱动器的布局问题进行了初步的探讨.

Mechanical Performances of Piezoelectric Element and Optimal Control

On the basis of performances of the piezoelectric actuators and sensors,the characteristics of beam with highly distributed piezoelectric sensors and actuators and a feedback conditioning system are analyzed,and the dynamic differential equation is also derived.A finite element model of the intelligent beam has been formulated to derive the differential equation.Having obtained the basic theories of the intelligent beam,both the first mode and the second mode of the cantilever beam and the simple supported beam are analyzed and calculated to determine the appropriate criteria for placing the actuator.Characteristics related to the location for the actuator placement are also developed and illustrated.The choice of actuator location is on the assumption that the actuator and sensor have no length,so the location of actuator that has length is also studied.