Pannil, Pittaya

Preferred name

Pannil, Pittaya

Alternative Name

Pannil, P.

Main Affiliation

School of Engineering

pittaya.pa@kmitl.ac.th

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Posicast PID × (n-2) Stage PD Cascade Controllers for Magnetically-Levitation System
(2017-01-01)
Surintramon, Panupong
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Pannil, Pittaya
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Ukakimaparn, Prapart
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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
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Pool-Em, Kittipat
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Trisuwannawat, Thanit
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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
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Kanchanasomranvong, Suksiri
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Ukakimaparn, Prapart
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Trisuwannawat, Thanit
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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
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Sungsorn, Teenapong
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Trisuwannawat, Thanit
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Tirasesth, Kitti
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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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PIDA controller designed by Kitti's method
(2009-12-01)
Ukakimaparn, Prapart
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Pannil, Pittaya
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Boonchuay, Peerapongpan
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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
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Pannil, Pittaya
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Ukakimaparn, Prapart
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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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Integral servo with PIDx(n-2)/2 stage PDA controllers for unstable systems
(2009-12-01)
Ukakimaparn, Prapart
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Pannil, Pittaya
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Irasesth, Kitti
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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.
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Discrete-time PIDA controller designed by Tustin's method with and without frequency pre-warping
(2018-06-08)
Ukakimaparn, Prapart
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Khwunthong, Mathee
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Trisuwannawat, Thanit
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Pannil, Pittaya
This paper proposes the formula used for finding the continuous-time PIDA (Proportional-Integral-Derivative-Acceleration) controller's parameters based on pole placement technique. Also, provide the formulas for designing the discrete-time PIDA controllers for both of Tustin's method with and without frequency pre-warping. The designers can use the frequency pre-warping to get the better specification as desired. Moreover, as both of these discrete-time PIDA controllers, theirs transfer functions are proper. Then, they are easy to implement in real-time by the Observable Canonical Form of the difference equations.
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Discrete-time PIDA controller designed by Kitti's method; A third generation
(2017-11-10)
Tongtanee, Anirut
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Pannil, Pittaya
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Ukakimaparn, Prapart
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Trisuwannawat, Thanit
This paper proposes the design of Discrete-Time PIDA (Proportional-Integral-Derivative-Acceleration) controller. Once, the satisfied PIDA controller in Continuous-Time system is obtained. Then, just discretises it by using trapezoidal approximation or bilinear transformation, the Discrete-Time PIDA controller is easily achieved as well. The root loci of the closed-loop systems are circular shapes in both s-Plane and z-Plane implied that increasing of the open loop gains, the faster and smaller in percent overshoot can be obtained. Comparing among three generations are shown that the third generation of Discrete-Time PIDA controller is the simplest way in design without the difficulty to place the zeros of the controller in z-Plane as in the second generation when the sampling time is too small.
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Discrete-time designs for load swing control of an overhead crane
(2011-02-01)
Ukakimaparn, Prapart
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Pannil, Pittaya
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Smerpitak, Krit
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Tirasesth, Kitti
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Trisuwannawat, Thanit
This paper proposed a controller design method for controlling the load swing of an overhead crane. By the addition of the quadratic derivative of state variables term in the usual standard performance index for Discrete Linear Quadratic Gaussian (DLQG) optimal control as an extra weighting to play the role in this task. The results revealed that the swing of the load can be decreased at numerous requirements with excellence. How to select the suitable weights for control is also suggested. © 2011 ISSN 2185-2766.

Pannil, Pittaya

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