Pannil, Pittaya

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Pannil, Pittaya
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Pannil, P.
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pittaya.pa@kmitl.ac.th

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    Hybrid Posi cast - based PID - PDA Control Using System Identification for Continuous Tunnel Kilns
    (2026-06-30)
    Pannil, Pittaya
    ;
    Sungsorn, Teenapong
    ;
    Trisuwannawat, Thanit
    ;
    Julsereewong, Amphawan
    ;
    Thepmanee, Teerawat
    This paper proposes a hybrid Posicast-based proportional-integral-derivative with proportional-derivative-acceleration (PID-PDA) controller for temperature regulation in delay-dominant continuous tunnel kilns. The controller is developed based on a system-identified second-order-plus-dead-time (SOPDT) model derived from industrial data and implemented in discrete time for programmable logic controllers (PLCs). A unified framework enables comparison with a standard PLC-based proportional-integral (PI) controller, an internal model control (IMC)-tuned PI controller, and a Smith Predictor-PI controller under identical conditions. Simulation results demonstrate faster response, negligible overshoot, and reduced tracking error, with improved settling time and lower, integral of absolute error (IAE), integral of squared error (ISE), and integral of time-weighted absolute error (ITAE), while maintaining comparable control effort. Robustness analysis confirms stable performance under plant perturbations, with IAE variations within approximately ± 10 (servo) and ± 1 (disturbance). The controller is validated on an Allen-Bradley PLC in a silicon controlled rectifier (SCR)-based heating system. Experimental results show improved steady-state performance, including reduced bias, lower mean absolute error (MAE) and root mean squared error (RMSE), reduced oscillation amplitude, and compliance within the ± 1 temperature band. The proposed approach provides a practical, robust, and high-performance solution for upgrading existing PLC-based systems without hardware modifications.
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    Posicast PID × (n-2) Stage PD Cascade Controllers for Magnetically-Levitation System
    (2017-01-01)
    Surintramon, Panupong
    ;
    Pannil, Pittaya
    ;
    Ukakimaparn, Prapart
    ;
    Trisuwannawat, Thanit
    When a plant to be controlled is third or higher n<sup>th</sup> order, the PID×(n-2) stage PD cascade controllers are very suitable to be applied for control. To verify the advantages of these controllers, the Magnetically-Levitation plant is then selected as an example of unstable plant to be stabilized and controlled. The design technique is based on placing the controller zeros. The overall controlled system can be approximated as a standard second-order system prompt for designing the Posicast controller to obtain the output response with no overshoot in the last step.
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    Discrete-time posicast PID×(n − 2) stage PD cascade controllers for unstable system
    (2018-08-01)
    Pannil, Pittaya
    ;
    Pool-Em, Kittipat
    ;
    Trisuwannawat, Thanit
    ;
    Ukakimaparn, Prapart
    This paper aims to present a discrete-time controller design for a two-degree-of-freedom (2-DOF) control system connected with Posicast function to stabilize an unstable third-order or higher-order plant. The continuous-time controllers used in the 2-DOF control system, the proportional-integral-derivative (PID)×(n − 2) stage proportional-derivative (PD) cascade controllers and the forward controller, are designed by using the Kitti’s method. The Posicast function is used to eliminate an overshoot in step response. Based on the continuous-time controllers designed in the s-domain, the discrete-time controllers with closed-form expression in the z-domain are then calculated by using the bilinear transformation. The magnetic levitation system is employed as an illustrative case study of the unstable plant to be controlled. By comparing the discrete-time system with the continuous-time system, the effectiveness of the proposed discrete-time controller design is verified by MATLAB simulation results.
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    Discrete PID×(n - 2) stage PD cascade controller for SISO systems
    (2008-12-01)
    Pannil, Pittaya
    ;
    Kanchanasomranvong, Suksiri
    ;
    Ukakimaparn, Prapart
    ;
    Trisuwannawat, Thanit
    ;
    Tirasesth, Kitti
    This paper presents a design method for discrete-time parallel with continuous-time design for the n<sup>th</sup> order plant employing PID (Proportional-Integral-derivative) ×(n - 2) stage PD as a cascade controller. The controller is designed to meet the transient and steady state response specifications via the root locus approach. The results revealed that, if the sufficient sampling time for discrete-time system is available, all desired specifications are easily obtained. © 2008 SICE.
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    Design of posicast pida controller using kitti's method
    (2020-10-01)
    Pannil, Pittaya
    ;
    Sungsorn, Teenapong
    ;
    Trisuwannawat, Thanit
    ;
    Tirasesth, Kitti
    ;
    Ukakimaparn, Prapart
    This paper proposes a successful technique for designing a PIDA (proportional-integral-derivative-acceleration) controller in both continuous-time and discrete-time frameworks, which provides better transient response specifications in comparison with PID (proportional-integral-derivative) controller for third-order plant. The proposed design technique consists of three major steps. First, the PIDA controller is designed by using Kitti's method based on root locus technique in the control loop. Second, the maximum percentage overshoot can be decreased to satisfy specification by applying the forward controller. Based on these two steps, all desired specifications can be achieved without trial and error method for tuning controller parameters. Lastly, the Posicast controller is simply designed because the controlled system can be approximated as a standard second-order system. The performances of the designed PIDA controller are confirmed through MATLAB simulation results.
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    Optimal control-based integral servo controller for an overhead crane system
    (2015-01-01)
    Pannil, Pittaya
    ;
    Kaeojaikla, Phattarapong
    ;
    Trisuwannawat, Thanit
    This paper presents an integral servo controller design in order to eliminate the steady-state tracking error of an overhead crane system according to the servo problem. The design technique uses optimal control approach which encourages to achieve the better performance of the controller for overhead crane system. The simulation results show that the designed integral servo controller can eliminate the errors and reduce the settling time of the responses according to the weight for the integral time. How to select the weights for control is also suggested.
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    PIDA controller designed by Kitti's method
    (2009-12-01)
    Ukakimaparn, Prapart
    ;
    Pannil, Pittaya
    ;
    Boonchuay, Peerapongpan
    ;
    Trisuwannawat, Thanit
    This paper presents a new method for designing the PIDA (Proportional-Integral-Derivative-Acceleration) Controller for a third order system. The results from simulations shown that all desired specifications can easily met by changing only one parameter. Comparing of the performances of the closed-loop in continuous-time system from this new simple method called "Kitti's Method" with the design technique proposed by Richard C. Dorf, it shown that not only faster with smaller or no overshoot response can be obtained but also the closed-loop system is robustly stable guaranteed. All merits of Kitti's Method are also being held with incorporated Root Locus Technique in discrete-time control systems design. © 2009 SICE.
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    Discrete-Time PID×(n-2) Stage PD Cascade Controllers with First Order Hold and Delayed First Order Hold Discretizations
    (2017-01-01)
    Chiengtee, Channarong
    ;
    Pannil, Pittaya
    ;
    Ukakimaparn, Prapart
    ;
    Trisuwannawat, Thanit
    This paper proposes a technique to design the (n-2) stage PD (Proportional-Derivative) controller cascaded with the PID (Proportional-Integral-Derivative) controller in accordance with nth order plants. The Continuous-Time (CT) design is firstly reviewed to show the advantages of the Kitti’s method. The proposed technique is based on the Kitti’s method in combination with the use of First Order Hold (FOH) to discretize the CT plant and Delayed First Order Hold (DFOH) to discretize the CT controller for obtaining the proper Discrete-Time (DT) controller structure. The simulation results confirm that the proposed design technique can be applied to the DT framework with better specifications than it was expected.
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    Discrete time robust integral servo with PID × (n-2)/2 Stage PDA Controllers for unstable systems
    (2012-12-01)
    Pannil, Pittaya
    ;
    Achariyapagon, Prachaya
    ;
    Trisuwannawat, Thanit
    This paper presents a design method for robustness stability results of unstable systems using forward controller employed to PID × (n-2)/2 Stages PDA Controllers which applied to integral servo problem, both continuous and discrete-time control systems, the root loci of this design method are shown the robustness results with the excellence transient response of this closed loop systems, moreover, in case of increasing controller loop gain, the system is still robustly stabilizable with better performance. © 2012 ICROS.
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    Integral servo with PIDx(n-2)/2 stage PDA controllers for unstable systems
    (2009-12-01)
    Ukakimaparn, Prapart
    ;
    Pannil, Pittaya
    ;
    Irasesth, Kitti
    ;
    Trisuwannawat, Thanit
    This paper presents the Integral Servo Problem via PID x(n / 2)/2 stage PDAcontrollers for the Inverted Pendulum System as an unstable system to becontrolled. The problem is formulated by introducing an integrator to perform anaugmented system to the original plant. Once, the augmented system order isknown, the number of PDA's stage is also being determined. By using Kitti'sMethod (KM) to assign the location of both PID's zero first, and then find thelocation of the remaining zero of PDA and the loop gain KSd using the criteriaof Root-Locus Technique. The results from root locus diagrams revealed that theInverted Pendulum System is robustly stabilizable. Moreover, increasing of theloop gain KSd higher than the designed value, result in not only a fastersettling time is obtained, but also a response with smaller till no overshoot aswell. ICIC International © 2009.