自适应结构仿人智能控制实验研究

A New Singular Quasi-compatible Finite Element of Piezoelectric Materials and Its Fracture Analysis

针对大型空间结构,基于MATLAB/dSPACE综合实验环境建立了以压电堆式主动构件为作动器的自适应桁架结构主动振动控制平台,进行了仿人智能控制实验研究。结果表明仿人智能控制可有效地用于压电自适应结构的振动控制,较好地解决了控制准确性与快速性之间的矛盾,使得四棱柱桁架在典型低频谐振频率持续激励时振幅降低90%以上,随机冲击衰减时间减少90%以上,且在扫频和混频激励下也取得良好的控制效果。

The active vibration control of adaptive structures for large complex spacecrafts is studied by Hu- man-Simulated Intelligent Control （HSIC） experiments of a tetragonal prism truss with a test platform based on MATLAB/dSPACE environment. The results show that HSIC can be effectively used for the vibration control of adaptive structures with piezoelectric stack actuators to solve the contradiction between accuracy and ra pidity. The amplitude of vibration is decreased more than 90% when continuously excited at a low resonant frequency, the time of vibration after an impingement is decreased more than 90%, and the control results are also satisfied when excited with chirp and mixed frequencies.