An Error Evaluation Method for the Ship Angular Flexure Measurement Based on the Principle of Relevance
| Autor: | Shiqiao Qin, Yutong Zhang, Xianglu Ma, Wenfeng Tan, Wei Wu |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
0209 industrial biotechnology
Observational error Article Subject Matching (graph theory) Computer science Covariance matrix General Mathematics lcsh:Mathematics 010401 analytical chemistry General Engineering Angular velocity 02 engineering and technology Kalman filter lcsh:QA1-939 01 natural sciences 0104 chemical sciences 020901 industrial engineering & automation Control theory lcsh:TA1-2040 Evaluation methods Range (statistics) Relevance (information retrieval) lcsh:Engineering (General). Civil engineering (General) |
| Zdroj: | Mathematical Problems in Engineering, Vol 2019 (2019) |
| ISSN: | 1563-5147 |
| Popis: | Due to the lack of true ship angular flexure data, it is difficult to evaluate its measurement error of the angular velocity matching method in practice. In this paper, the cause of the measurement error of the ship flexure angle is analyzed in theory, and an evaluation method for the ship angular flexure measurement error based on the principle of relevance is proposed. The proposed method provides a prediction formula to describe the estimation error of the static flexure angle based on the off-diagonal elements of the error covariance matrix P in Kalman filtering. In addition, the optimized coefficient F is introduced to make the prediction error range better describe the real error variation. The optimized coefficient F ensures that the proposed formula has good prediction effects in all three directions. Simulations based on the actual measured ship flexure data are carried out, and the simulation results verify the capability of the prediction formula. The proposed method can be used in the evaluation of the ship flexure measurement error. |
| Databáze: | OpenAIRE |
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