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| Dynamic load identification correction algorithm based on polynomial fitting initial value |
| ZHAO Fengyao1, ZHANG Jiancheng1, GE Wei1, JIANG Jinhui2, LI Hanyu1 |
1.School of Water Conservancy Engineering, Zhengzhou University, Zhengzhou 450001, China;
2.State Key Laboratory of Mechanics and Control of Mechanical Structures, College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China |
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Abstract Aiming at the problem of load identification results being not ideal due to initial value sensitivity of Wilson-θ inverse analysis method, the polynomial fitting method was introduced to correct initial value based on the idea of error correction to improve Wilson-θ inverse analysis method.Through deducing the error transfer formula of Wilson-θ inverse analysis method, the influencing principle of initial error on identification results was summarized, and the polynomial fitting method was used to calculate the displacement trend term to correct the initial value of the system.The results showed that the polynomial fitting method can effectively solve the initial value sensitivity problem of Wilson-θ inverse analysis method, and has a certain anti-noise performance and higher accuracy.
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Received: 31 August 2020
Published: 15 June 2021
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