NLH

Furthermore, the NLH sensor can be miniature, low-noise and low power consumption, and which can be suitable for in-line inspection for mechanical damage in pipelines.

而且，非线性谐波检测传感器可做到小型化、低噪声、低功耗，经过合理的设计和改进后，可以实现管道机械损伤的在线检测。

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In the paper, the fundamental principle of NLH method is introduced, and a kind of mechanical damage inspection sensor based on FPGA is designed;

文中介绍了非线性谐波在线检测技术的检测原理，并以FPGA为核心设计了一种基于非线性谐波方法的机械损伤检测传感器。

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The unsteady calculation adopts the Non Linear Harmonic ( NLH) function, to be aimed at blades preliminary designed, to analyze the aerodynamic performance and possible loss of the LSBs, and analyze the influence of the unsteady flow on LSBs based on the results.

非定常计算采用非线性谐函数方法，针对初步成型的叶片，分析其气动性能及可能的损失，并基于流场结果分析非定常流动对末级叶片的影响。

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