| Bode积分定理在舵减摇H∞设计中应用 |
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| 引用本文： | 刘彦文,刘 胜,綦志刚.Bode积分定理在舵减摇H∞设计中应用[J].海洋工程,2009,27(1):90-95. |
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| 作者姓名： | 刘彦文 刘 胜 綦志刚 |
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| 作者单位： | 哈尔滨工程大学,自动化学院,黑龙江,哈尔滨150001 |
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| 基金项目： | 哈尔滨工程大学校基础研究基金 |
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| 摘 要： | 针对舵减摇系统的 H∞混合灵敏度问题,研究了控制系统设计中的限制因素,指出舵减摇控制系统的性能(灵敏度特性)要受到Bode积分定理的约束,因此在船舶横摇自然频率附近的频段内性能不能做到太低.考虑这些限制条件,并从基本的性能要求出发,详细说明了舵减摇系统 H∞设计中权函数的确定.经过多次重新设计和对比,给出了一组最为合理的设计结果.仿真结果表明,所设计的 H∞控制系统满足性能要求,而且取得了很高地减摇效果.
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| 关 键 词： | 舵减摇 H∞设计 Bode积分 混合灵敏度 |
| 收稿时间： | 2008/3/3 0:00:00 |
| 修稿时间： | 2008/9/28 0:00:00 |
Application of Bode's theorem in the H∞ design for ship rudder roll stabilization |
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| ZHANG Yun-qiu,HU Jin-peng and ZHANG Ning chuan.Application of Bode''s theorem in the H∞ design for ship rudder roll stabilization[J].Ocean Engineering,2009,27(1):90-95. |
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| Authors: | ZHANG Yun-qiu HU Jin-peng and ZHANG Ning chuan |
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| Institution: | College of Automation;Harbin Engineering University;Harbin 150001;China |
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| Abstract: | Numerical simulations of freak wave generation are studied in random oceanic sea states described by JONSWAP spectrum. The evolution of initial random wave trains is numerically carried out within the framework of the modified four-order nonlinear Schroedinger equation (mNLSE), and some involved influence factors are also discussed. Results show that if the sideband instability is satisfied, a random wave train may evolve into a freak wave train, and simultaneously the setting of the Phillips parameter and enhancement coefficient of JONSWAP spectrum and initial random phases is very important for the formation of freak waves. The way to increase the generation efficiency of freak waves thsough changing the involved parameters is also presented. |
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| Keywords: | freak waves mNLSE sideband instability random wave JONSWAP spectrum |
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