Wongvanich, Napasool

Preferred name

Alternative Name

Wongvanich, N.

Main Affiliation

School of Engineering

napasool.wo@kmitl.ac.th

Now showing 1 - 10 of 14

Some of the metrics are blocked by your
consent settings
Model based control of the heat exchanger system with accumulative heat reservoir
(2019-10-01)
Ahpichitpongchai, Panuwat
;
Kamonwattana, Kamonchanok
;
Intarit, Wiriya
;
Wongvanich, Napasool
;
Kongratana, Viriya
This paper designs a model based control system for the heat exchanger system with accumulative heat reservoir. The heat exchanger system was firstly modelled through the set of five differential equations, that also take into account the heat accumulation inside the reservoirs. Temperature data was obtained through the use of a temperature sensor (LM 35) which is connected to LabView through a DAQ. The collected data was then processed using an integral based method to determine the parameters of the heat exchanger system. The appropriate PID gains are selected by pole placement methodology. Results show that the set of PID gains that were determined through the use of calculations outperformed the arbitrary chosen set of gains.
Some of the metrics are blocked by your
consent settings
PLC-based industrial temperature controller with different response times
(2017-12-13)
Gulpanich, S.
;
Krongratana, V.
;
Srimuang, Arthit
;
Tipsuwanporn, V.
;
Wongvanich, N.
This work presents a temperature control of industrial ovens using block FB58 'TCONT-CP' from the Siemens S7-300 PLC, which is evaluated by the OB35 interrupt. Two plants were considered. The first plant was a small industrial oven made of aluminum of size 1.5 cm × 5 cm and taking in 60 W of heat. The second plant was a large industry oven with a 0.125 m<sup>3</sup> capacity, capable of exuding 1500 W of heat. Both experiments were controlled by the same Block Command and ovens were tested separately. The Cohen-Coon PID tuning method was firstly applied to both plants, with a separate controller values being obtained for each plant. These values were kept fixed throughout the experiments. A tailored approach was adopted whereby a pulse gen was used in conjunction with the PID control for the small plant; whereas a control zoning was used for the larger plant. Result show that the tailored approach yielded significant improvements in settling times compared to a conventional PID controller.
Some of the metrics are blocked by your
consent settings
System identification of the two tanks system subjected to WirelessHART delays
(2018-12-10)
Wongvanich, Napasool
;
Somkane, Pongsakorn
;
Kongratana, Viriya
This paper proposes an integral-based method for parameter identification of the coupled tank model used in level control. The plant uses WirelessHART communication protocol to interact between devices in the system, which has a data update rate of 8 seconds, causing time delay impacting the stability of the control system. Two models are considered. The first model is the simple linear model where the delay from the WirelessHART is assumed to be negligible. The second model extends this first model, and introduces nonlinearity from the WirelessHART delay into the model. Results showed that although the both the linear and non linear models provides a good match to the WirelessHART-affected plant responses, the nonlinear model provides on average a 25% better match than the linear model. This model and method can be used to design a more effective controller to combat the WirelessHART induced delay systems.
Some of the metrics are blocked by your
consent settings
Simplified Modeling Approach to Characterize Sudden Load Disturbances in WirelessHART FOPDT Systems
(2018-12-18)
Wongvanich, Napasool
;
Pongsumpun, Puntani
This paper presents the simplified modelling approach to characterize sudden load disturbance in WirelessHART™. Two approaches are presented. The model was firstly formulated through Laplace transformation, where the resulting integral equation renders non-linear optimization problems into simple linear optimizations. Experiments were conducted on a coupled tanks system connected through the WirelessHART™ protocol. Based on the initial fit to the experimental results, the second model then places two locally affine relationships, one for the load flow disturbances, and the other for the level measurements to the responses. The extended locally affine model gave on average a 25% reduction in errors, compared to the Laplace-based method, while better captured the non-linear effects resulting from the WirelessHART™.
Some of the metrics are blocked by your
consent settings
Agricultural Mobile Robot Body Vibration Characterization Using Integral Based Methodology
(2019-04-01)
Boksuwan, Sungwan
;
Chesof, Abdulhafiz
;
Wongvanich, Napasool
;
Panaudomsap, Sumit
This paper presents the application of integral based method for characterization of the vibration in the four-wheel agricultural mobile robot, which is designed for use in applications such trimming, spraying and harvesting. Vibration occurs when one of the wheels does not touch the ground which reduces an effective of end effector. In order to design an effective controller, an accurate mathematical model is needed. Results show that the proposed method can simplify the system identification procedure, while yielding excellent match in comparison to the standard black box method. The proposed algorithm gave an NRMSE match of 96.8%, while the standard method yielded a 76.1% match. This match is also found to be lower when the validation data was from other experiments.
Some of the metrics are blocked by your
consent settings
A study of flow-level cascade control with WirelessHARTTM transmitter using LabVIEW
(2017-12-13)
Somkane, Pongsakorn
;
Kongratana, V.
;
Gulpanich, S.
;
Tipsuwanporn, V.
;
Wongvanich, N.
This work presents a cascade control architecture to combat network induced delays in Wireless network controlled systems. Specifically a flow-level cascade control system is considered whereby the primary process variable is liquid level, and the secondary process variable is the flow rate. The flow-level process variables are measured by Wireless HART differential Pressure (DP) transmitter and sent through a WirelessHART gateway. Control actions are provided by a control valve actuator which is manipulated through a PLC. The PLC and the WirelessHART gateway are managed by an OPC server providing a medium of communication. The PID controller gains are designed through the LabView software, in which the network induced delays is offset by adjusting the controller interval until the responses are satisfactory. Results show that cascade control outperformed the single loop control, in both handling network induced delays and coping with disturbances.
Some of the metrics are blocked by your
consent settings
Integral-based algorithm for parameter identification of the heat exchanger
(2018-01-01)
Wongvanich, Napasool
;
Kongratana, Viriya
This paper develops an integral based method for the system identification and modeling of the heat exchanger. The proposed method formulates the model through the use of integrals, thus rendering a nonconvex optimization problem into simple linear optimization which can be solved through an ordinary least squares method. The convection heat exchanger model is firstly assumed, whereby all the inlet and outlet temperatures are measured or known. Two experiments were conducted. The first involved a series of step responses with incremental heating input, whilst the second involved step responses taken only after the system has cooled down to room temperature. Results show that the proposed method allowed a more complicated model of the heat exchanger to be constructed, whilst still being robust to Gaussian and quantization as well as encoder noises.
Some of the metrics are blocked by your
consent settings
Age structural model of the hand foot mouth disease in Thailand
(2018-12-01)
Pongsumpun, Puntani
;
Wongvanich, Napasool
The hand foot mouth disease (HFMD) is a virulent disease caused by virus of the enteroviruses serotypes, whose symptoms include soreness inside or around the mouth, and rashes or blisters on the hands, feet or legs. Most cases are seen in infant and children. The severity of HFMD outbreaks has thus constituted serious threat to general public health. In this work, the transmission model of the HFMD is formulated. Specifically, the population is divided into two subclasses, namely, those under the age of ten, and those over the age of ten. Two SEIR models, one for each subclasses, are then formed. This model is then analyzed through the use of standard dynamical systems method, where two equilibriums of the model, namely the disease-free equilibrium, and the endemic equilibrium, are firstly determined. Stability analyses of the respective equilibriums are then conducted. Results show that the disease-free equilibrium will be stable if the basic reproduction number is less than one, while the endemic equilibrium is stable when the basic reproduction number exceeds unity. These results can be used in controlling the epidemics of the HFMD.
Some of the metrics are blocked by your
consent settings
Optimal control of the dengue dynamical transmission with vertical transmission
(2019-12-01)
Pongsumpun, Puntani
;
Tang, I. Ming
;
Wongvanich, Napasool
Dengue disease is found in tropical and subtropical regions around the world. Dengue virus is the cause of dengue fever, dengue hemorrhagic fever, and dengue shock syndrome. It consists of 4 serotypes: DEN-1, DEN-2, DEN-3, and DEN-4. There are two modes of transmission for dengue virus in mosquito: horizontal transmission and vertical transmission. The mosquito can be infected when it bites an infectious human by horizontal transmission, but there can also be vertical transmission through sexual contact with an infected mosquito. This research presents a control mechanism based on our previously developed dengue model with vertical transmission. The two policies, namely vaccination and insecticide administration (Policy 1) and isolation and insecticide administration (Policy 2) are considered. The use of Pontryargin’s maximum principle allowed necessary and optimality conditions, thus facilitating the optimal control to be developed. Numerical solutions of our control systems and the conclusions of our two policies are presented.
Some of the metrics are blocked by your
consent settings
PLC-Based Wheelchair Control with Integration of the Internet of Things
(2018-10-15)
Gulpanich, Suphan
;
Petchhan, Jirayu
;
Wongvanich, Napasool
This paper presents a PLC-based mobile mecanum-wheeled wheelchair control algorithm with the integration of the Internet of Things (IoT). The design aims to enhance comfort to the handicapped by offering wireless wheelchair control in addition to the Human Machine Interface (HMI) over the Ethernet port. The bottom-up approach was taken where proportional mobility control in the vector form of speed and direction is firstly configured and displayed over the touch screen. Remote access is then designed to access through the use of the HMI Remote Viewer application which supports and displays the corresponding speed and direction on a smartphone, upon wireless communication. Results show that the communication speed is within the rapidity range, whereas the locomotion test shows an average of 8.5% drop in speed from the no-load case to the loaded case. The proposed design thus provides a complete range of wheelchair control which can be used to assist the handicapped.

Wongvanich, Napasool

Filters

Settings

Sort By

Results per page