Improved PID Autotuning for Balanced Control Operation.
ABSTRACT This paper analyzes optimal controller settings for controllers with One-Degree-of-Freedom (1-DoF) Proportional-Integral-Derivative (PID) structure. The analysis is conducted from the point of view of the operating mode (either servo or regulation mode) of the control-loop and tuning mode of the controller. Performance of the optimal tuning settings can be degraded when the operating mode is different from that selected for tuning and obviously both situations can be present in any control system. In this context, a Performance Degradation index is minimized and based on this minimization, an autotuning procedure as a function of the normalized process dead-time is proposed.
Conference Paper: Stability Analysis for the Intermediate Servo/regulation PID Tuning.[Show abstract] [Hide abstract]
ABSTRACT: This paper introduces the stability analysis for the so-called intermediate-tuning PID controller. Thus, each of the three PID parameters is proposed to lie within the convex hull of two extreme values, being defined as the optimal tuning settings for servo and regulation modes respectively. The result ensures that all the PID controllers generated for each frozen value of the interpolating parameters guarantee the stability of the closed-loop.Proceedings of 12th IEEE International Conference on Emerging Technologies and Factory Automation, ETFA 2009, September 22-25, 2008, Palma de Mallorca, Spain; 01/2009