动态载荷识别的自适应延迟逆模型方法
发布时间:2018-01-13 15:40
本文关键词:动态载荷识别的自适应延迟逆模型方法 出处:《船舶力学》2017年05期 论文类型:期刊论文
更多相关文章: 振动 时域载荷识别 自适应延迟逆模型 时间延迟
【摘要】:为减小载荷识别问题对原系统先验知识的依赖,采用系统的自适应延迟逆模型识别时域载荷。采用自适应算法辨识延迟逆模型,代替了一般识别方法中的系统特性矩阵求逆过程,避免了病态问题。随后将工作状态下的响应作为逆模型的输入,则其输出就是时域载荷的延迟估计。通过对两端简支梁结构进行载荷识别的仿真研究,以及对双层隔振试验台架的试验研究,识别了稳态激励和瞬态激励,验证了该方法的有效性。该方法不需要了解系统的数学模型及参数,因此能够应用于工程实践中。
[Abstract]:In order to reduce the dependence of load identification problem on prior knowledge of the original system, the adaptive delay inverse model of the system is used to identify the time-domain load, and the adaptive algorithm is used to identify the delayed inverse model. Instead of the inverse process of the system characteristic matrix in the general identification method, the ill-conditioned problem is avoided, and then the response in the working state is taken as the input of the inverse model. Then its output is the time-domain load delay estimation. Through the simulation research on the load identification of the simply supported beam structure at both ends, and the experimental research on the double-layer vibration isolation test rig, the steady and transient excitation are identified. The validity of the method is verified. The method does not need to know the mathematical model and parameters of the system, so it can be applied in engineering practice.
【作者单位】: 哈尔滨工程大学动力与能源工程学院;中国核动力研究设计院;
【基金】:国家自然科学基金资助项目(50979016) 中央高校基本科研业务费专项资金项目(HEUCFZ1115)
【分类号】:O347.1
【正文快照】: 卷积法[1]、SWAT方法[2-3]、卡尔曼滤波器和递归最小二乘法[4-5]、逆系统法[6-7]等方法。反卷积法需要对系统的时域振动特性矩阵进行逆运算,易出现病态问题,影响动态载荷的识别精度。SWAT方法仅适用于具有刚体模态的结构且所求为动态载荷的合力,因此其应用有很大的局限性。卡,
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