Ahmed Alenany - Academia.edu (original) (raw)
Uploads
Papers by Ahmed Alenany
In this paper, simple rules for tuning PID controllers for integrator/dead time processes are pro... more In this paper, simple rules for tuning PID controllers for integrator/dead time processes are proposed. These rules are derived by the optimization of a discrete-time error integral criterion called the switch time weighted summation of squared error (SWSSE) criterion. In this criterion, the first M samples of the transient response are weighted by 1, while the remaining samples until the end of the response are heavily weighted by e.g. 10 4 . The instant, M, of applying the large weight affects the characteristics of the response. By choosing M that achieves the minimum possible settling time, it is found that the optimal controller for servo problem is PD, while for regulatory problem it is PID. To get a single set of rules, a two-degree of freedom (2DOF) controller is then proposed, in which the PID settings for load disturbance rejection is used in addition to a first-order set-point filter to improve the set-point response. The proposed rules achieve good settling time, nearly no overshoot, fast load disturbance rejection and fair control effort. The robustness of the proposed method is quite acceptable.
In this paper, simple rules for tuning PID controllers for integrator/dead time processes are pro... more In this paper, simple rules for tuning PID controllers for integrator/dead time processes are proposed. These rules are derived by the optimization of a discrete-time error integral criterion called the switch time weighted summation of squared error (SWSSE) criterion. In this criterion, the first M samples of the transient response are weighted by 1, while the remaining samples until the end of the response are heavily weighted by e.g. 10 4 . The instant, M, of applying the large weight affects the characteristics of the response. By choosing M that achieves the minimum possible settling time, it is found that the optimal controller for servo problem is PD, while for regulatory problem it is PID. To get a single set of rules, a two-degree of freedom (2DOF) controller is then proposed, in which the PID settings for load disturbance rejection is used in addition to a first-order set-point filter to improve the set-point response. The proposed rules achieve good settling time, nearly no overshoot, fast load disturbance rejection and fair control effort. The robustness of the proposed method is quite acceptable.