Jansri, Anurak

Preferred name

Jansri, Anurak

Alternative Name

Jansri, Anuruk

Main Affiliation

International Academy of Aviation Industry

anurak.ja@kmitl.ac.th

Now showing 1 - 10 of 15

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On comparison of attractors for chaotic mobile robots
(2004-12-01)
Jansri, Anurak
;
Klomkarn, Kitdakorn
;
Sooraksa, Pitikhate
In case of no map, trajectory planning could be a difficult task for robot motions to navigate around the assigned patrol areas. Chaotic mobile robots that move in chaotic patterns can be used to solve this problem. This paper is motivated by the question in seeking for suitable chaotic pattern for the aforementioned problem. Twenty-five chaotic patterns generated from various chaotic signals for the robot's path are compared by computer simulation under given conditions. © 2004 IEEE.
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Chaotic control for the reactor of a continuous microwave biomass carbonization process
(2015-04-23)
Payakkawan, Poomyos
;
Jansri, Anurak
;
Phumpho, Suwilai
;
Tong-Aram, Direk
;
Keattipun, Pithuk
This paper presented a new heating technique using chaotic mode pattern generator to control a uniform- heating distribution of multi-feed microwave cavity in order to heat the reactor of a pilot-scale continuous microwave biomass carbonization process This technique not only suggest the potential of the proposed system which operates more smoothly but also reduce electric power consumptions of the continuous microwave biomass carbonization process.
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The Development of an Automated Technology for Unmanned Aircraft CNS/UTM in Compliance with Safety and Security Measures of the State
(2025-01-01)
Yenpiem, Siriporn
;
Yooyen, Soemsak
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Banchong-Aksorn, Sasicha
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Yoneyama, Keito R.
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Jansri, Anurak
This research project supports the Senate's study and represents the government committee on promoting and developing the use of unmanned aircraft in low-altitude flights, with safety measures in accordance with the International Civil Aviation Organization's and Civil Aviation Authority of Thailand's minimum requirements. The main objective of this study is to create an innovative approach to enhance the country's competitiveness, which must also be accepted at the national and international level. This is based on the reasons for building infrastructure and networks for communications, navigation, and surveillance analysis to prevent aircraft from colliding and assessing the aircraft's behaviors in both segregated and current manned air traffic-controlled airspace. The study supports the utilization of air traffic management for the Unmanned Aircraft System Traffic Management (UTM) Platform, which is a necessary tool in facilitating the policy of using unmanned aircraft for commercial use. It can be extended for practical uses and further development in areas where there is an integration between manned and unmanned aircraft, both small and large for sustainable future development. It consists of basic theoretical analysis, system requirements for flight operations, and applications for low-altitude operations (within 500 feet and weighing less than 150 kilograms). The study methodology for constructing a quantitative and qualitative method includes: 1.Creating a system for requesting risk assessment levels for flight operation and program development 2.Creating systems for managing aviation mapping and geo-awareness information 3.Creating a system for requesting activities, flight and flight plan authorization, examining flight areas, and communication network identifications. Which will be used with tracking, advising, helping, recording, and monitoring aircraft behaviors. 4.Creating a system for examining other aircraft, airspace traffic information, obstacles during flight operations, and deconflicts. This research lays the foundation for future studies in the aviation sector, including the development of unmanned aircraft system traffic management and urban air mobility systems, and the integration of unmanned with manned aircraft, regardless of aircraft type. However, continuous national and international research will remain critical.
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Simple nonlinear air to fuel ratio control for spark ignition engines
(2012-07-30)
Jansri, Anurak
;
Sooraksa, Pitikhate
Development of a mathematical model of air to fuel ratio and control for SI engines has been proposed in various themes to satisfy technical specification. This paper reveals a simple yet effective nonlinear control to enhance the regulator. The mean value engine model (MVEM) is employed and enhanced to validate the effectiveness of the proposed scheme. The regulator is designed using a discrete fuzzy PI algorithm, provided easy tuning, robustness, and rapid development with simple architecture. Effects on dead time, exhausted delay, and chaotic disturbance are also included. The simulation results show satisfactory performance using standard criteria such as an integral of absolute error (ITAE), an integral of square error (ISE) and an integral of absolute control output (IACO) and a mean absolute error (MAE). © 2012 IEEE.
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Tree robot: An innovation for STEAM education
(2016-12-14)
Sooraksa, Pitikhate
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Sakorntanant, Sakda
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Jansri, Anurak
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Klomkarn, Kitdakorn
Embracing complexity in today's world makes students impatient to learn following the conventional chalk-and-talk style of teaching, and yet plenty of helpful IT-techniques are available and surrounded. This talk provides a care-and-feeding of STEAM education, namely 'Science, Technology, Engineering, Art, and Mathematics', offering a new way of utilizing matters of natural learning to be 'live'. A tree robot is created as an instrument to help students achieve the 21<sup>st</sup> century learning skills. As a result of many hours in experiments with the proposed pedagogy, the robot helps redefine what attention is and how to use it innovatively.
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Further investigation on trajectory of chaotic guiding signals for robotic systems
(2004-12-01)
Jansri, Anurak
;
Klomkarn, Kitdakorn
;
Sooraksa, Pitikhate
Chaotic signals have been used and can be generated by a chaotic circuit for controlling trajectories of mobile robots. Application of chaotically robotic systems may be employed for cleaning and patrolling tasks, when information of areas at work is not available. This paper presents an investigation on trajectory of chaotic guiding signals generated by Chua's attractor and Arnold's non-attractor in five given situations. According to the simulation, with best adjusting parameters for both signals, the trajectory generated from Chua's pattern has covered more areas than that of Arnold's counterpart for all testing cases.
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Enhanced model and fuzzy strategy of air to fuel ratio control for spark ignition engines
(2012-09-01)
Jansri, Anurak
;
Sooraksa, Pitikhate
Various mathematical models for the air to fuel ratio and control for spark ignition (SI) engines have been proposed to satisfy technical specifications. This paper reveals an improvement of the mean value model (MVEM) and a simple yet effective nonlinear control to enhance the air to fuel regulator. The regulator is designed by using a discrete fuzzy PI algorithm, which provides easy tuning, robustness, and rapid development with a simple architecture. Effects on the dead time, exhausted delay, time-varying air flow and chaotic disturbance are also included. The computer simulation results show satisfactory performance based on standard evaluation criteria. The proposed model has a great potential for practical implementations. © 2011 Elsevier Ltd. All rights reserved.
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Anti-copy of 2D Barcode Using Multi-encryption Technique
(2014-01-01)
Phumpho, Suwilai
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Payakkawan, Poomyos
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Jansri, Anurak
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Tongaram, Direk
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Promprayoon, Chirasak
2D barcode can be found largely at product of department store. The general purpose of 2D barcode is to identify product. Process of 2D barcode is run in the assembly production line. Nowadays, the simple 2D barcode can be easily copied. Then, this paper proposes new technique to generate 2D barcode. The technique is multi encryption by chaotic equation that is very difficult to reproduce. In experimental design, 2D barcode can be used only one-time and can be recorded into decoding system to protect repeating. This paper has led to real benefit for Fresh Group company limited in Thailand.
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Fuzzy strategy with overshoot suppressor for electronic throttle control
(2016-05-09)
Jansri, Anurak
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Chatpoj, Montri
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Phatrapornnant, Teera
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Sooraksa, Pitikhate
Electronic throttle actuator is a nonlinear device which has various factors, such as delay time of backlash, gear friction, throttle valve friction and stiffness of spring, can affect to the responsiveness of vehicle control. The major impact on electronic throttle control is the return spring load. It can cause both overshoot and undershoot behaviors while the electronic throttle operates. This paper presents an overshoot/undershoot suppressor technique by using anti-windup algorithm with simple architecture to eliminate unwanted behaviors. In the experiment, a conventional PID controller and the proposed fuzzy-PI controller are used, and also implemented into microcontroller chip. In addition, this paper reveals a single phase driver circuit for hardware setup. The experiment results show that the controllers with proposed overshoot suppressor can perform effectively. The controller performance is evaluated by using standard criteria: an integral of square error (ISE), an integral of absolute error (IAE), a maximum overshoot (OVM) and a maximum settling time (STM).
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Design and implementation of continuous microwave biomass carbonization system
(2012-08-10)
Payakkawan, Poomyos
;
Areejit, Suwilai
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Jansri, Anurak
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Klomkarn, Kitdakorn
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Aoyama, Hisayuki
This paper discusses a new design and implementation of a microwave heating for continuous biomass GHz frequency. This new technique is developed to control electromagnetic field distribution inside the microwave heating cavity reactor of biomass carbonization. A chaotic mode pattern microwave generator is used for the technique. The result shows that the technique gives the cost and time-saving, easy to control, and effective performance. © 2012 IEEE.

Jansri, Anurak

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