AN IMPROVED EIGENSYTEM REALIZATION ALGORITHM AND ITS APPLICATION ON OCEAN PLATFORM
Junfeng Xin1，Yongbo Zhang2, SHENG Jinlu3.4
1.Qingdao University of Science and Technology, Qingdao,266061;
2. Qingdao National Oceanographic center, Qingdao 266071;
3. Ocean University of China，Qingdao 266100
Abstract：Based on matrix mapping theory, An improved eigensystem realization algorithm(ERA), called C/ERA , is proposed in the paper. It rebuilds a Hankel matrix by replacing all elements of each anti-subdiagonal by the arithmetic average of the elements along the anti-subdiagonal and introduces the concept of using the Frobenius norm (L2-norm) to control iterations number after implementing SVD algorithm by ERA method. With the data associated with a 5-DOF mass-spring-dashpot system and jacket-type platform under impact loading, it is proved that C/ERA has a better capacity of de-noising, higher accuracy for low order modes and identifies more high order modes than ERA does.
辛峻峰1，张永波2，盛进路3.4. 一种改进的特征系统实现算法及其在海洋平台上的应用[J]. 振动与冲击, 2015, 34(24): 197-201.
Junfeng Xin1，Yongbo Zhang2, SHENG Jinlu3.4. AN IMPROVED EIGENSYTEM REALIZATION ALGORITHM AND ITS APPLICATION ON OCEAN PLATFORM. JOURNAL OF VIBRATION AND SHOCK, 2015, 34(24): 197-201.
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