Abstract
This paper presents a performance (Integrated Absolute Error IAE) — robustness (Maximum Sensitivity M s ) tradeoff analysis for First-Order-Plus-Dead-Time (FOPDT) and Second-Order-Plus-Dead-Time (SOPDT) servo-control and regulatory control systems with One-Degree-of-Freedom (1-Dof) and Two-Degree-of Freedom (2-Dof) Proportional Integral (PI) and Proportional Integral Derivative (PID) controllers. Analysis shows that for same model, performance optimized 1-DoF PI controllers are more robust than the PIDs but their optimal performance is lower. The performance optimized regulatory control systems, PI and PID, are less robust than the servo-control ones, requiring also more performance degradation to reach the same robustness level.
Published Version
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