Nonlinear System Identification of Folding Fins with Freeplay Using Direct Parameter Estimation
Folding fins are widely adopted in missiles for the efficient use of space during storage and transportation, while nonlinear behavior of freeplay is inevitable due to the factors such as mismachining tolerance, assembly error, and abrasion. The problem of nonlinear system identification of folding...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2019-01-01
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| Series: | International Journal of Aerospace Engineering |
| Online Access: | http://dx.doi.org/10.1155/2019/3978260 |
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| _version_ | 1850238030277771264 |
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| author | Zhi-Sai Ma Bo Wang Xin Zhang Qian Ding |
| author_facet | Zhi-Sai Ma Bo Wang Xin Zhang Qian Ding |
| author_sort | Zhi-Sai Ma |
| collection | DOAJ |
| description | Folding fins are widely adopted in missiles for the efficient use of space during storage and transportation, while nonlinear behavior of freeplay is inevitable due to the factors such as mismachining tolerance, assembly error, and abrasion. The problem of nonlinear system identification of folding fins with freeplay is considered in this paper. A direct parameter estimation method which can identify the nonlinear system with freeplay under base excitation is proposed and subsequently applied to establish the nonlinear dynamic model of a folding fin. The best set of coefficients is selected by using the significance test, allowing the proposed method to detect and locate the most relevant nonlinearities of the practical structure. Experimental results demonstrate that the proposed method is able to decouple the linear and nonlinear dynamics of a nonlinear structure and estimate natural frequencies of the derived linear system along with nonlinear internal forces in one computational step, even if no a priori knowledge of the type of nonlinearities is given. |
| format | Article |
| id | doaj-art-07ce0bc453204009b9c5781a6909dbb9 |
| institution | OA Journals |
| issn | 1687-5966 1687-5974 |
| language | English |
| publishDate | 2019-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Aerospace Engineering |
| spelling | doaj-art-07ce0bc453204009b9c5781a6909dbb92025-08-20T02:01:35ZengWileyInternational Journal of Aerospace Engineering1687-59661687-59742019-01-01201910.1155/2019/39782603978260Nonlinear System Identification of Folding Fins with Freeplay Using Direct Parameter EstimationZhi-Sai Ma0Bo Wang1Xin Zhang2Qian Ding3School of Mechanical Engineering, Tianjin University, Tianjin 300350, ChinaBeijing Institute of Structure and Environment Engineering, Beijing 100076, ChinaBeijing Institute of Electronic System Engineering, Beijing 100854, ChinaSchool of Mechanical Engineering, Tianjin University, Tianjin 300350, ChinaFolding fins are widely adopted in missiles for the efficient use of space during storage and transportation, while nonlinear behavior of freeplay is inevitable due to the factors such as mismachining tolerance, assembly error, and abrasion. The problem of nonlinear system identification of folding fins with freeplay is considered in this paper. A direct parameter estimation method which can identify the nonlinear system with freeplay under base excitation is proposed and subsequently applied to establish the nonlinear dynamic model of a folding fin. The best set of coefficients is selected by using the significance test, allowing the proposed method to detect and locate the most relevant nonlinearities of the practical structure. Experimental results demonstrate that the proposed method is able to decouple the linear and nonlinear dynamics of a nonlinear structure and estimate natural frequencies of the derived linear system along with nonlinear internal forces in one computational step, even if no a priori knowledge of the type of nonlinearities is given.http://dx.doi.org/10.1155/2019/3978260 |
| spellingShingle | Zhi-Sai Ma Bo Wang Xin Zhang Qian Ding Nonlinear System Identification of Folding Fins with Freeplay Using Direct Parameter Estimation International Journal of Aerospace Engineering |
| title | Nonlinear System Identification of Folding Fins with Freeplay Using Direct Parameter Estimation |
| title_full | Nonlinear System Identification of Folding Fins with Freeplay Using Direct Parameter Estimation |
| title_fullStr | Nonlinear System Identification of Folding Fins with Freeplay Using Direct Parameter Estimation |
| title_full_unstemmed | Nonlinear System Identification of Folding Fins with Freeplay Using Direct Parameter Estimation |
| title_short | Nonlinear System Identification of Folding Fins with Freeplay Using Direct Parameter Estimation |
| title_sort | nonlinear system identification of folding fins with freeplay using direct parameter estimation |
| url | http://dx.doi.org/10.1155/2019/3978260 |
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