Design Techniques Study of PID Controllers

Magnitude Optimum Techniques for PID Controllers

Today, most tuning rules for PID controllers are based either on the process step response or else on relay-excitation experiments. Tuning methods based on the process step response are usually based on the estimated process gain and process lag and rise times (Åström & Hägglund, 1995). The relay-excitation method is keeping the process in the closed-loop configuration during experiment by usin...

The New Design Strategy on PID Controllers

On the design of multivariable PID controllers via LMI approach

In the past decades, we have witnessed the developments of various kinds of modern or postmodern control theories, such as LQG or LQR optimal control, H∞ control, and μ analysis and synthesis, from their emergence to maturity and applications in some practical systems. Despite of the success of the modern or postmodern control theory, we have to admit that the majority of the controllers used i...

Design of PI and PID controllers with transient performance specification

Proportional-integral-derivative (PID) controllers are widely used in industrial control systems because of the reduced number of parameters to be tuned. The most popular design technique is the Ziegler–Nichols method, which relies solely on parameters obtained from the plant step response. However, besides being suitable only for systems with monotonic step response, the compensated systems wh...

A design of PID controllers using FRIT-PSO

This paper proposes the Fictitious Reference Iterative Tuning-Particle Swarm Optimization (PSO-FRIT) method to design PID controllers for control systems. The proposed method is an offline PID parameter tuning method and it is not necessary to derive any mathematical models of objected control systems. The proposed method is demonstrated by comparing with the FRIT method in numerical examples. ...