For stabilization of an unstable system, feedback is a necessity. With uncertainties in the operating environment, and in system components, feedback is needed to preserve stability and improve performance. However, feedback can also be dangerous. A tighter feedback loop, instead of achieving better performance, may cause instability. To guard against such dangers, the quantitative concepts of gain and phase stability margins were among the frequency domain tools of the classical Nyquist-Bode designs.
Weitere Kapitel dieses Buchs durch Wischen aufrufen
- Stability Margins and Optimality
Dr R. Sepulchre
Dr M. Janković
Professor P. V. Kokotović
- Springer London
- Chapter 3