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Outline
Real-time inversion of wave parameters in actual oceans using ship motion sensor data holds significant value for ship performance research. Compared to direct measurement methods, this indirect inversion approach offers advantages in real-time capability, cost efficiency, and ease of installation. Based on potential flow theory, this paper derives the wave-induced hull motion transfer function (response amplitude operator, RAO) using the principle of linear superposition. Combined with Kalman filtering (KF) technology, a time-frequency inversion model for wave parameters is proposed. The objective is to inversely determine the wave height time history and directional spectrum of random multi-directional waves based on the ship's multi-degree-of-freedom motion. Testing and validation were conducted using simulated multi-degree-of-freedom ship motion signals with noise as input. Results demonstrate that the KF model can effectively inverts directional spectra and wave height time histories for each principal wave direction and sea state level, with a maximum significant wave height inversion error of 10.08%. This indicates the KF model's potential for inverting wave directional spectra in real ocean environments.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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