Nundrakwang, Songmoung

Preferred name

Alternative Name

Nundrakwang, S.

Main Affiliation

School of Engineering

songmoung.nu@kmitl.ac.th

Now showing 1 - 10 of 22

Some of the metrics are blocked by your
consent settings
A Comparative Study of the Electrical Characteristics of Piezoelectric and Triboelectric Nanogenerators for Energy-Harvesting Floor Tiles
(2020-06-01)
Yingyong, Phonexai
;
Thainiramit, Panu
;
Nundrakwang, Songmoung
;
Janphuang, Pattanaphong
;
Isarakorn, Don
Piezoelectric and Triboelectric nanogenerators (PENG and TENG) have gained significant attention for use in self-powered electronics and sensing systems. They also have high potential to harvest energy from low-frequency vibration sources in the ambient environment. This paper investigated the performance and behavior of the two aforementioned nanogenerators based on energy-harvesting floor tiles by using a test bench to demonstrate the electrical characteristics output and comparing their power density output, energy density output, and other properties for characterization and scale-up in practical applications. The input used in the experiment varied the gap distance of the cover plate for the test bench with constant pneumatic pressure to excite the cover plate. The experimental results showed that the power density and energy density of PENG were higher than those of the TENG. The power density and energy density measured in 10 s under 2 Hz of input excitation of PENG and TENG at the gap width of 5 mm were 5773.35 μW/cm3, 1376.26 μJ/cm3 and 752.34 μW/cm3, 31.32 μJ/cm3, respectively. Due to their high output density, they enable promising possibilities to power small consumption electronics and sensing systems.
Some of the metrics are blocked by your
consent settings
Internet based crossover robot remote control competition among Asian countries - Development of practice based innovative education methodology, Phase V
(2012-10-23)
Xu, C.
;
Ming, A.
;
Kanamori, C.
;
Aoyama, H.
;
Li, H.
We introduce 2011's progress and achievements of an internet based crossover robot remote control competition between Japan and China, Thailand, and Taiwan respectively. The competition project has two subjects: the competition itself and the student-student communication and cooperation. The basic competition mode is a remotely controlled robot via the internet cooperates with a locally controlled robot to finish a specified task and, as a unique feature of the project, the studentstudent communication and cooperation is trained through a crossover team organization style that each team is organized by two groups from different universities and the team members required to cooperate with each other via the internet to make robots and deal with competition affairs. Our experience shows the competition benefits not only students' technical skills but also their various no-technical skills and is expected to promote the development of a practice based university education methodology in the future. © 2012 IEEE.
Some of the metrics are blocked by your
consent settings
Multivariable control of overhead crane system by CRA method
(2008-12-01)
Nundrakwang, Songmoung
;
Benjanarasuth, Taworn
;
Ngamwiwit, Jongkol
;
Komine, Noriyuki
In this paper, three controllers, namely I-PD, PD and I-P controllers designed by CRA method for simultaneously controlling the trolley position, load-swing angle and hoisting rope length of the overhead crane system is proposed. The non-linear model of the crane system is first approximated to be three transfer functions in accordance with the trolley position, load-swing angle and hoisting rope length respectively. Then, the corresponding parameters of the I-PD, PD and I-P controllers are designed independently based on the appropriate values of generalized time constant and characteristic ratios. The implementation results show the good performances of the overhead crane system controlled by these controllers. The speed adjustment effects and fast rejection of the disturbance effect occurred at the input force of the trolley are also shown by the experimental results. © 2008 SICE.
Some of the metrics are blocked by your
consent settings
Energy harvesting for self-powered systems
(2020-07-01)
Nundrakwang, Songmoung
;
Yingyong, Phonexai
;
Isarakorn, Don
Harvesting energy from waste energy sources in ambient environmental is the accessible technology in the field of self-power electronic devices for high-efficiency energy due to the power consumption of modern electronic devices that are rapidly developed to microwatt, low-cost, lightweight, and small size. Since numerous research are investigated the technique for converting the ambient energy into useable electrical energy for practical application. Including light, thermal gradients, vibration or motion, and radio-frequency electromagnetic radiation, various forms of waste energy sources are proposed in this review. Their existing power density in the ambient environment is demonstrated. Moreover, the fundamental theory and the application of the energy harvesting devices are discussed as a foundation of the energy conversion technology for self-power electronic devices such as handheld, wearable, and portable devices.
Some of the metrics are blocked by your
consent settings
Hybrid controller for rotational inverted pendulum systems
(2008-12-01)
Benjanarasuth, Taworn
;
Nundrakwang, Songmoung
In this paper, a controller designed by energy control technique and servo state feedback with minimum-order observer control algorithm to swing up the pendulum of the rotational inverted pendulum system from the natural pendent position to around the upright position and to stabilize the pendulum in upright position is proposed. The proposed control scheme composes of two parts. The first part is the swing-up control using the energy-based controller and the second part is the stabilizing control using the servo state feedback with minimum-order observer controller. From the implementation of the controller to the rotational inverted pendulum system in laboratory, the pendulum can be swung up within a short period of time with small oscillation of the base angle. Furthermore, without changing the parameters of the proposed controller, the responses of the system when changing the length of the pendulum is also shown to demonstrate the robustness of the proposed control system. © 2008 SICE.
Some of the metrics are blocked by your
consent settings
Hybrid controller for inverted pendulum system
(2008-12-01)
Panya, Samatthachai
;
Benjanarasuth, Taworn
;
Nundrakwang, Songmoung
;
Ngamwiwit, Jongkol
;
Komine, Noriyuki
In this paper, a hybrid controller designed for swinging up and stabilizing an inverted pendulum on cart system is presented. The controller composes of a PD controller and a sliding mode controller. The PD controller is implemented to control the position of the cart to swing up the pendulum from the natural pendent position to around the upright position, while the sliding mode controller is implemented to stabilize the inverted pendulum in the upright position. Root-locus method is applied to design the PD controller and LQR method is employed to design the sliding mode controller. The implementation results of the proposed hybrid controller are shown in this paper. © 2008 IEEE.
Some of the metrics are blocked by your
consent settings
Energy analysis in Zigbee based wireless sensor node powered by piezoelectric energy harvester
(2014-01-01)
Isarakorn, Don
;
Sudhawiyangkul, Thapanun
;
Nundrakwang, Songmoung
Recently, an integration of wireless sensor network with energy harvesters is getting more interested because it can extend the life time of battery in a sensor node, which is very important in many applications. This paper presents the concept of energy analysis in Zigbee based wireless sensor network, which is powered by a piezoelectric energy harvester to optimize the algorithms used in wireless sensor network. In this work, difference aspects related to piezoelectric energy harvester, characteristic of power consumption in Zigbee based wireless sensor node and concept of optimizing algorithms to balance input and output power in the integrated system are proposed. © (2014) Trans Tech Publications, Switzerland.
Some of the metrics are blocked by your
consent settings
Simplified Design of I-P Controllers for Two-Inertia Speed Control Systems
(2008-12-01)
Benjanarasuth, Taworn
;
Nundrakwang, Songmoung
;
Panya, Samatthachai
;
Komine, Noriyuki
A simplified design of I-P controller by the concept of model order reduction of a higher-order plant and by the CRA method with less number of characteristic ratios α<inf>i</inf> is presented in this paper. Two model order reduction techniques are employed to obtain the reduced order models of a higher- order plant first. Then the I-P controllers are designed for the reduced order models by using CRA method with the appropriate values of characteristic ratios and of the generalized time constant in order to obtain the closed-loop step responses without overshoots. Finally, the designed I-P controllers are employed to control the original higher-order plant. The acceptable performances of the speed control of a two-inertia system employing the proposed I-P controllers designed from the reduced order models are still obtained as verified by the simulation results. Tracking the retarded motor speed and disturbance rejection are also investigated. © 2008 IEEE.
Some of the metrics are blocked by your
consent settings
Comparative study of QCM analyzers based on pierce oscillator and electromechanical impedance techniques
(2017-02-21)
Jayasvasti, Subhawat
;
Isarakorn, Don
;
Nundrakwang, Songmoung
This paper presents a comparison between pierce oscillator and impedance analysis techniques for measuring the frequency of the quartz crystal. The QCM analyzer based on pierce oscillator is designed, realized, and then compared to the impedance analyzer (Type bode 100). The comparison is focused on accuracy and precision of measurement. The pierce oscillator in a completed-chip is employed in the QCM analyzing device in order to simplify the circuit of system. The frequency drift and standard deviation (SD) values which are obtained from resonant frequency measurement are studied in order to investigate the accurate and precise measurement of devices. In the experiment, an AT-cut quartz disc of crystal oscillator package HC49U is unloaded and loaded while it is being measured the frequency. From the experimental results, the QCM analyzer based on pierce oscillator and impedance analyzer have the approximate accuracy and precision of measurement. The QCM analyzer based on pierce oscillator has lower sensitivity due to the frequency drift.
1
Some of the metrics are blocked by your
consent settings
CDM based servo state feedback controller with minimum-order observer for crane system
(2006-12-01)
Puwan, Santi
;
Nundrakwang, Songmoung
;
Benjanarasuth, Taworn
;
Ngamwiwit, Jongkol
;
Komine, Noriyuki
In this paper, the design of servo state feedback controller with minimum-order observer by using the concept of Coefficient Diagram Method (CDM) for crane system is presented. An Integrator is augmented to the system so that the system will exhibit no steady-state error in the response to step input. In order to apply the CDM method, the mathematical model of the crane system must be firstly linearlized and converted into controllable canonical form by transformation matrix. Then feedback gain matrix, integral gain and observer gain matrix in sense of CDM can be obtained. The satisfied performances of the crane system controlled by the proposed controller are shown in simulation results. © 2006 IEEE.
2

Nundrakwang, Songmoung

Filters

Settings

Sort By

Results per page