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The pump-jet thrusters produce structural noise during operation.The pump-jet propulsors made of conventional materials often have heavy structure weights. And in this case it is difficult to balance the stern weight. The use of composite materials in the pump-jet propulsor structure can not only greatly reduce the overall weight, but also have good corrosion resistance and fatigue resistance. Focusing on the vibration control problem of composite duct structure of pump-jet propulsors, this paper presents the research on experimental modeling, algorithm optimization design, hardware platform construction and test for MFC-based structural vibration active control system construction and verification based on macro fiber composite (MFC). The genetic algorithm was applied to the optimization design of linear quadratic Gaussian (LQG) controller, and the control effects of the algorithm before and after optimization were compared by experiments. A model identification platform and an active control test platform were built for the composite duct. The control model was obtained by experimental modeling method and the active vibration control test under harmonic excitation was carried out in the air environment. The research attempts to push MFC-based active vibration control method to application scenarios.
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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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