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基于动-静叶片相位调制的冷却风扇离散噪声控制 被引量:3
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作者 彭志刚 欧阳华 +1 位作者 吴亚东 田杰 《上海交通大学学报》 EI CAS CSCD 北大核心 2019年第4期396-404,共9页
随着汽车工业的发展和人们对驾驶舒适性要求的不断提高,汽车冷却风扇组件(CFM)离散噪声水平的控制与改善日趋重要.在CFM设计的早期,寻找一种能够快速预测离散噪声的方法有助于设计师缩短设计周期,提高工作效率.为此,提出一种动-静叶片... 随着汽车工业的发展和人们对驾驶舒适性要求的不断提高,汽车冷却风扇组件(CFM)离散噪声水平的控制与改善日趋重要.在CFM设计的早期,寻找一种能够快速预测离散噪声的方法有助于设计师缩短设计周期,提高工作效率.为此,提出一种动-静叶片相位调制的组合方法来控制CFM的谐波噪声,即通过控制CFM叶片的角度分布参数来降低CFM噪声频谱中的二次谐波以及三次谐波成分;基于静叶(定子叶片或者支撑筋)阵列的声学百叶窗效应,设计静叶角度分布参数,使CFM噪声频谱中的一次谐波成分进一步降低,从整体上改善CFM的离散噪声水平.通过7叶片风扇分别与6静叶和8静叶的组合对所提出的方法进行实验验证,结果表明其与理论预测结果较为吻合. 展开更多
关键词 非均布叶片 离散噪声控制 动-静叶片 相位调制
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ON CONTROL OF STRONG CONSENSUS FOR NETWORKED AGENTS WITH NOISY OBSERVATIONS 被引量:8
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作者 Haitao FANG Han-Fu CHEN Lei WEN 《Journal of Systems Science & Complexity》 SCIE EI CSCD 2012年第1期1-12,共12页
The discrete-time first-order multi-agent networks with communication noises are under consideration. Based on the noisy observations, the consensus control is given for networks with both fixed and time-varying topol... The discrete-time first-order multi-agent networks with communication noises are under consideration. Based on the noisy observations, the consensus control is given for networks with both fixed and time-varying topologies. The states of agents in the resulting closed-loop network are updated by a stochastic approximation (SA) algorithm, and the consensus analysis for networks turns to be the convergence analysis for SA. For networks with fixed topologies, the proposed consensus control leads to consensus of agents with probability one if the graph associated with the network is connected. In the case of time-varying topologies, the similar results are derived if the graph is jointly connected in a fixed time period. Compared with existing results, the networks considered here are in a more general setting under weaker assumptions and the strong consensus is established by a simpler proof. 展开更多
关键词 Consensus control multi-agent networks stochastic approximation strong consensus.
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