Pannil, Pittaya

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Pannil, Pittaya
Alternative Name
Pannil, P.
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Email
pittaya.pa@kmitl.ac.th

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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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    A CMOS piecewise-linear circuit for nonlinear function syntheses
    (2001-12-01)
    Petchmaneelumka, Wandee
    ;
    Chaikla, Amphawan
    ;
    Pannil, Pittaya
    ;
    Julprapa, Attaya
    ;
    Riewruja, Vanchai
    A piecewise-linear circuit element, termed a current limiter, is proposed in this paper. The limit-point and break-point of the current limiter can be electronically varied. The proposed circuits can be employed to synthesize accurately a large class of nonlinear function circuit. The proposed principle is suitable for implementation in a standard CMOS process. Simulation results showing the accuracy and linearity of the proposed circuits are also included.
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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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    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.
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    Discrete optimal H2 controller for Inverted Pendulum System
    (2008-12-01)
    Pannil, Pittaya
    ;
    Srisiri, Nattakan
    ;
    Ukakimaparn, Prapart
    ;
    Trisuwannawat, Thanit
    ;
    Tirasesth, Kitti
    This paper presents the designing of the digital controller compare with analog controller for Inverted Pendulum System. The digital controller that presented is discrete optimal H<inf>2</inf> controller by discretizing plant then applied it with digital controller design technique, as DLQR, DLQE and DLQG follow state-space approach including addition of the quadratic derivatives of state variables term in the usual standard performance index for Linear Quadratic Gaussian optimal control as an extra weighting function to play the role in swing suppressor. The results revealed that the swing of the Pendulum's angle can be decreased at numerous requirements with excellence. How to select the suitable weights for control is also suggested. © 2008 SICE.