Design and Analysis of Sampled-Data Control System Using Dual-Locus Technique

Abstract

The author proposes a very simple and elegant graphical technique for the design and analysis of sampled-data control system in the s-plane with and without inherent time-delay in the plant. The method is straight-forward and does not resort to any approximation or transformation. A readymade delay chart plotted beforehand helps in ascertaining the design parameters for stability quickly. The information about hidden oscillations in the system between sampling instants are also available by this method.

Indexing Terms:

• Sampled-Data Stability
• Retarded System
• Dual-Locus Technique