【摘要】 系统地研究了基于遗传算法的线性结构系统模态参数识别方法。遗传算法对广义动力学系统的辨识已经得到了充分研究,但在结构系统参数辨识方面的研究还不多,使用浮点数编码方案,利用频响函数数据,给出了结构系统模态参数识别步骤。由于遗传算法的全局寻优特性,该算法具有极强的抗噪声能力,即使对噪声严重污染的数据依然能够很好的辨识出待辨识的参数。通过一个两自由度的弹簧质量块系统进行了仿真分析,最后将方法用于一个实际的导弹结构的实验数据分析。更多还原

【Abstract】 The linear structure system modal parameters identification based on genetic algorithms is studied.genetic algorithms has been well studied in generalization dynamics system identification,but less work has been done in the structural system identification.Therefore,based on floating point coding,the steps of structural model parameter indentification using the frequency response data are given.Because of the global optimization of genetic algorithms,the method has good quality of resisting noise.The result is validated by simulating of a two degreeof freedom mass-spring-system.Finally proposed method is used to identifying modal parameter of the missile structure.更多还原