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本文在Shannon恢复定理和傅立叶变换的基础上,证明了在发动机性能参数的平均值测量中按照△t≤1/2f_c_o选择采样速率是必需的,并且给出了在△t(?)1/2f_c_o情况下由采样造成的平均值测量误差.文中有实例供参考.
Based on the Shannon recovery theorem and the Fourier transform, it is proved that it is necessary to select the sampling rate according to △ t≤1 / 2f_c_o in the average measurement of the engine performance parameters, and it is necessary to select the sampling rate at Δt (?) 1/2f_c_o In the case of sampling caused by the average measurement error.There are examples for reference.