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针对在薄壳结构上层合压电传感器与作动器的智能结构系统进行振动控制问题,提出了一种专用的数字电路化智能元仿真模型进行振动特性分析的新方法.以压电悬臂梁系统为例,利用有限差分方法将主体结构、压电传感信号及压电控制力矩的动力学偏微分方程转化为智能元差分方程;建立基于Newmark-β积分方法的智能元数学矩阵模型;在DSP数字电路系统上设计智能元仿真系统;对不同差分密度和积分时间步长下系统各个模态的输出特性进行了分析,并与相关文献中采用不同控制方法的模拟电路仿真结果进行了比较,取得了更精确的结果.该方法为压电结构系统的振动特性仿真分析提供了新途径.
Aiming at the problem of vibration control of smart structure system with piezoelectric sensor and actuator laminated on the thin shell structure, a new method of analyzing the vibration characteristics of digital intelligent circuit simulation model is proposed. The piezoelectric cantilever beam system As an example, the dynamic partial differential equations of the main structure, the piezoelectric sensing signal and the piezoelectric control torque are transformed into the intelligent element difference equation by using the finite difference method; the intelligent elemental matrix model based on the Newmark-β integral method is established; Digital circuit system design intelligent element simulation system; Different differential density and integral time step of the output of the various modes of the system were analyzed and compared with the relevant literature using different control methods of analog circuit simulation results were obtained A more accurate result is obtained.The method provides a new way to simulate the vibration characteristics of piezoelectric structural system.