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通过对伪随信号谱分析法的讨论，给出了在电液伺服阀动态测试时伪随机信号的选择原则，并通过实验证明了使用伪随机信号进行电液伺服阀在线动态测试的可行性。与传统的频率响应的正弦分析法相比，利用伪随机信号的谱分析法具有一些明显的优势
Through the discussion of spectrum analysis of pseudo-random signal, the principle of pseudo-random signal selection in the dynamic test of electro-hydraulic servo valve is given. The feasibility of online dynamic test of electro-hydraulic servo valve by using pseudo-random signal is proved by experiments. Compared with the traditional sinusoidal analysis of frequency response, spectrum analysis using pseudo-random signal has some obvious advantages