Wongvanich, Napasool
Loading...
Preferred name
Wongvanich, Napasool
Alternative Name
Wongvanich, N.
Main Affiliation
Email
napasool.wo@kmitl.ac.th
7 results
Now showing 1 - 7 of 7
- Some of the metrics are blocked by yourconsent settings
Item type:Publication, A Novel Practical Fixed-Time Speed Control of Permanent Magnet Synchronous Motors with Input Saturation(2025-01-01); In this article, we focus on a control problem for the speed control of a permanent magnet synchronous motor (PMSM). An antisaturation adaptive fixed-time nonsingular sliding mode control (AFFTNSM) with disturbance estimation compensation is designed for a class of second-order nonlinear systems to improve PMSM system performance. Firstly, a novel fast fixed-time nonsingular sliding mode surface is chosen based on the error dynamic equation. Then, a practical fixed-time sliding mode control algorithm is proposed where the stability of the proposed controller is demonstrated to show the convergence of the velocity tracking error to a neighborhood of the origin in fixed-time. The implementation of feedforward compensation of disturbance enhances the dynamic performance of the fast fixed-time nonsingular sliding mode control rule, resulting in reduced chattering phenomena. Numerical simulation results are provided to verify the efficiency of the proposed method. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Observer-less Fixed-Time Speed Control For Permanent Magnet Synchronous Motors with matched-mismatched disturbances(2025-01-01); This paper presents a state-dependent Variable Exponent Coefficient Sliding Mode Control (VECFSMC) By inducing fixed-time stability analysis, the proposed state-dependent sliding surface provides not only system stability but also a quick response in a fixed period of time as well as counteract with matched and mismatched disturbances. The proposed sliding mode control strategy does not use observers to estimate the disturbances. The designed sliding mode surface possesses robustness properties which is sufficient to cope with both matched and mismatch disturbances in a period of fixed time. Firstly, the mathematical model of permanent magnet synchronous motor and the mathematical background of variable exponent coefficient are demonstrated theoretically. Secondly, the state-dependent sliding surface with variable exponent coefficient is designed. The controller that can manipulate both the speed of PMSM and matched-mismatched disturbances is constructed. Lyapunov function is applied to assess the stability of the proposed method. Finally, a numerical simulation with PMSM drive shows fast convergence, good robustness against both matched and mismatched disturbances. The proposed fixed-time controller with this observer-less method offers high efficiency and offers not too complicated control solution comparing to the other fixed-time and finite-time methods with a small number of parameters. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Robust Practical Fixed-Time Control and Application to DC-DC Buck Converter(2024-01-01); - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Robust Variable Exponent Fixed-Time Speed Control of PMSMs Based on a Fixed-Time Sliding Mode Observer(2025-01-01); This paper presents a state-dependent variable exponent coefficient sliding mode control (VECFSMC). By inducing fixed-time stability analysis, the proposed state-dependent sliding surface provides not only system stability but also a quick response in a fixed period of time. To enhance the controller's ability to direct state trajectories along the sliding surface manifold towards equilibrium and attain the desired outputs despite the presence of disturbances, a fixed-time sliding-mode observer (FTSMO) has been created. The approach is assessed by Lyapunov stability analysis. Eventually, a numerical simulation of composited fixed-time Controller and fixed time Observer evidently shows fast convergence, high robustness against lump disturbances. The proposed technique, along with the fixed-time observer, achieves global fixed-time stabilization and offers straightforward implementation compared to other fixed-time methods, requiring the tuning of fewer parameters. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Practical Robust Fixed-Time Speed Control of Permanent Magnet Synchronous Motors with Adaptive Disturbance Rejection(2025-01-01); - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Robust Constant Exponent Coefficient Fixed-Time Control Based on Finite-Time Extended Sliding Mode Observer of Permanent Magnet Synchronous Motors(2023-11-01); This paper presents the Robust Constant Exponent Coefficient Fixed-Time Control (CECFSMC), an innovative control technique for precisely regulating the speed of a permanent magnet synchronous motor (PMSM) by utilizing fixed-time stability with constant exponent coefficients to provide not only faster convergence but also in a specific period of time. The effect of chattering is also lessened. To ensure that the designed controller produces the desired performance under bounded disturbances, a finite-time extended sliding-mode observer (ESMO) is also designed to estimate the PMSM velocity while also estimating lumped load disturbances. The considered PMSM is the surface-mounted PMSM. Finally, a numerical simulation with PMSM drive shows good robustness against load disturbances, better convergence, and a reaching time of less than 2 s, thereby demonstrating that the proposed fixed-time constant exponent coefficient offers good performance and is much simpler than the conventional finite-time method. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, A Constant Exponent Coefficient Fixed-Time Control For Voltage Regulating DC-DC Converter(2025-01-01); This research examines the voltage regulation capabilities of a DC-DC converter that employs the Fixed-Time control (FTSMC) method, incorporating a Constant Exponent Coefficient reaching law technique. The suggested approach is characterized by its simplicity, stability, and robustness, especially in the face of significant variations in load demands and input voltage. A state-space average dynamical model (SSA) is formulated. Initially, Continuous Conduction Mode (CCM) is established, followed by the development of the more advanced Discontinuous Conduction Mode (DCM). The nonlinear model considers two variables associated with the controlled voltage and the inductor coil current as state variables. To estimate unknown parameters, the feedback linearization method is applied. The dynamic system's output voltage is regulated using a Fixed-Time control technique. The proposed control system's stability is validated through the application of Lyapunov's theorem, which guarantees closed-loop stability. Finally, the simulation outcomes indicate the performance regulation relative to conventional linear controllers.