• 2022-06-27
    17d62511f163f35.png对该图所示开环[img=468x180]17d62511fe7fe57.png[/img],仔细分析,可以发现其Nyquist曲线的穿越次数为( )
    A: N+ =0,N-= 1
    B: N+ =0,N-= 0
    C: N+ =1,N-= 0
    D: N+ =1,N-= 1