A method for auto-tuning fully cross-coupled multivariable PID controllers from decentralized
relay feedback is proposed for multivariable processes with significant interactions …

Relay feedback has attracted considerable research attention for more than a century but
there has been no recent summary of the many newly-developed tools and results now …

It is well-known that PID controllers show poor control performances for an integrating
process and a large time delay process. Moreover, it cannot incorporate ramp-type set-point …

In terms of relative gain and relative frequency, the effective transfer function for independent
controller design for multi-input multi-output processes is provided in this paper. Differing …

This paper presents a simple, but effective, design method for decentralized PI control
systems with guaranteed closed-loop stability. Nyquist stability conditions are used to derive …

Despite the success of the relay-feedback system in autotune identification, it is well known
that an ideal (on-off) relay-based identification can lead to significant error in the ultimate …

In this paper, first we analyze why the conventional PID controller is not suitable to control
integrating processes mathematically and intuitively. To overcome its structural limitation, we …

An effective method for design and tuning of decentralized PI controllers for stable multi-
input, multi-output systems is presented in this brief. The direct Nyquist array is applied to …

In this paper, an analytical multiloop controller design method is proposed for industrial and
chemical two-by-two processes with time delays. By proposing the practically desired closed …

Despite of a huge number of classic optimal control theory algorithms developed during the
sixties, seventies, and eighties, and a large number of very sophisticated optimal control …