Howtosignalprocessing
- How do I know if my Nyquist is stable?
- How do you find the stability with Nyquist plot?
- What does the Nyquist criterion tell us?
How do I know if my Nyquist is stable?
1.10 Nyquist Stability Criterion
A feedback system is stable if and only if N=−P, i.e. the number of the counterclockwise encirclements of –1 point by the Nyquist plot in the GH-plane is equal to the number of the unstable poles of the open-loop transfer function.
How do you find the stability with Nyquist plot?
Stability is determined by looking at the number of encirclements of the point (−1, 0). The range of gains over which the system will be stable can be determined by looking at crossings of the real axis. The Nyquist plot can provide some information about the shape of the transfer function.
What does the Nyquist criterion tell us?
The Nyquist criterion states that a repetitive waveform can be correctly reconstructed provided that the sampling frequency is greater than double the highest frequency to be sampled.
