【摘要】 响应教育部关于一流本科课程持续建设的高阶性要求，以奈氏曲线穿过(-1,j0)点时的稳定判据为例，对“自动控制原理”高阶性建设开展了探索。结合幅角原理得到了穿过(-1,j0)点时稳定性判断方法及不稳定时右半平面闭环极点个数的判断方法。示例展示了原点处或虚轴上闭环极点为单重根和多重根的情形，验证了所提判断方法的正确性。最后对课程的高阶性建设思路做了总结。更多还原

【Abstract】 In order to respond to the high-order requirements of the Ministry of Education on the continuous construction of first-class undergraduate courses, this paper carries out some explorations on the high-order construction of course Principle of Automatic Control through the Nyquist stability criterion when passing through point(-1, j0). Using the argument principle, a theoretical analysis of Nyquist curve passing through(-1,j0) is carried out, and both the stability judgment method and the judgment method of the number of closed-loop poles on the right half plane when unstable are obtained. Examples show the cases when the closed-loop poles at the origin or on the virtual axis are single root or double roots, and verify the correctness of the proposed method. Finally, this paper summarizes the high-order construction of the course.更多还原