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在理论上和实践上推导含有不稳定环节时开环频率特性曲线的完整画法,以便应用奈氏判据全面地判断闭环系统的稳定性。
In theory and in practice, we deduce the complete drawing of the open-loop frequency characteristic curve with unstable links so as to judge the stability of the closed-loop system comprehensively by applying the Ness’s criterion.