Nyquist Criterion

Nyquist Criterion

 

(named after the American physicist H. Nyquist), a frequency criterion for the stability of linear automatic control systems with constant parameters. This criterion can also be applied to time lag systems.

References in periodicals archive ?
Key words: time delay systems, argument principle, distributed delays, Nyquist criterion
In this contribution, we derive the generalized Nyquist criterion for LTI-TDS with distributed delays, for both retarded and neutral cases, ensuring the closed loop asymptotic and robust stability.
In this contribution, a generalized Nyquist criterion for both retarded and neutral LTI-TDS with distributed delays has been presented.