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考虑特定场址环境条件对于风电机组载荷与结构安全特性的影响,基于某3 MW双馈型风电机组载荷模型,运用GH Bladed软件对不同场址环境条件下的风电机组载荷进行仿真计算,形成特征环境条件下载荷特性数据库。分析各环境条件参数对风电机组关键部件极限与疲劳载荷的影响特性。基于特征载荷数据库,运用BP神经网络预测方法,建立特定场址条件下风电机组关键部件极限与疲劳载荷预测模型,并将模型预测结果与仿真结果进行比对。结果表明,基于BP神经网络的风电机组极限与疲劳载荷预测结果误差在6%以内,该方法对于不同场址条件下风电机组载荷与结构安全性评估具有普遍适用性。 相似文献
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A wideband on-chip millimeter-wave patch antenna in 0.18 μm CMOS with a low-resistivity (10 Ω.cm) silicon substrate is presented. The wideband is achieved by reducing the Q factor and exciting the high-order radiation modes with size optimization. The antenna uses an on-chip top layer metal as the patch and a probe station as the ground plane. The on-chip ground plane is connected to the probe station using the inner connection structure of the probe station for better performance. The simulated S11 is less than -10 dB over 46-95 GHz, which is well matched with the measured results over the available 40-67 GHz frequency range from our measurement equipment. A maximum gain of-5.55 dBi with 4% radiation efficiency at a 60 GHz point is also achieved based on Ansofi HFSS simulation. Compared with the current state-of-the-art devices, the presented antenna achieves a wider bandwidth and could be used in wideband millimeter-wave communication and image applications. 相似文献
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A wideband on-chip millimeter-wave patch antenna in 0.18 μm CMOS with a low-resistivity(10Ω·cm) silicon substrate is presented.The wideband is achieved by reducing the Q factor and exciting the high-order radiation modes with size optimization.The antenna uses an on-chip top layer metal as the patch and a probe station as the ground plane.The on-chip ground plane is connected to the probe station using the inner connection structure of the probe station for better performance.The simulated S11 is less than –10 dB over 46–95 GHz,which is well matched with the measured results over the available 40–67 GHz frequency range from our measurement equipment.A maximum gain of –5.55 dBi with 4% radiation efficiency at a 60 GHz point is also achieved based on Ansoft HFSS simulation.Compared with the current state-of-the-art devices,the presented antenna achieves a wider bandwidth and could be used in wideband millimeter-wave communication and image applications. 相似文献
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