• Title/Summary/Keyword: Automatic teaching system

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A study on an error recovery expert system as a part of man-robot system (Man-robot system의 일환으로서 에러회복 전문가시스템에 관한 연구)

  • 이순요;김창대
    • 제어로봇시스템학회:학술대회논문집
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    • 1988.10a
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    • pp.518-523
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    • 1988
  • A Teaching and Operating Expert System (TOES) was designed in order to perform a task effectively which is inaccessible to man. Once an error occurs in the middle of the task operation, the automatic mode is converted into a manual mode. After recovering the error by the manual mode, the manual mode should be converted into the automatic mode. It was necessary to improve the manual mode in order to increase the availability of a man-robot system, a part of the human interface technique. Therefore, the Error Recovery Expert System must be constructed and developed.

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Development of API module program for automatic tool compensation on machining center (머시닝센터의 자동공구보정을 위한 API모듈용 프로그램개발)

  • 정상화;신현성;김현욱
    • Proceedings of the Korean Society of Machine Tool Engineers Conference
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    • 2002.04a
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    • pp.100-105
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    • 2002
  • In general, manufacturing error originated in bad material, machine tool defection, tool defection, and tool breakage. When the manufacturing process is stable, the error is come from the tool wear. In common on-machine measurement, teaching probe and touch sensor are widely used, however in this thesis the automatic tool compensation system using electric touch point measuring system is developed and evaluated, and effective operating is proposed.

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Development of automatic flow control system for the practice of Ziegler-Nichols and Cohen-Coon control theory (Ziegler-Nichols와 Cohen-Coon 제어 이론의 실습을 위한 자동 유량제어 시스템의 구축)

  • Kang, Tae-Won;Lee, Ho-Gyun
    • Journal of Engineering Education Research
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    • v.20 no.4
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    • pp.61-66
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    • 2017
  • Automatic flow control system composed by hardware and software was designed and fabricated to be used as teaching tool of feedback control theory in university experimental class. This system includes hardwares like data acquisition board, flow measuring device, transmitters, and the pneumatic valve, and software like LabView program for the monitoring and control of flow rates. The system was designed as the student can see the control effect of not only set point but also disturbance changes. Also the LabView program was composed for the calculation of controller parameters of both Ziegler-Nichols and Cohen-Coon tuning. The students can apply both tuning constants and compare the control performances. This system will provide the easy way for the students to understand the function and specification of control hardwares, and to raise the programing ability of control software.

Realization of Online System Considering the Lecture Intelligibility of University Student

  • Han, ChangPyoung;Hong, YouSik
    • International Journal of Internet, Broadcasting and Communication
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    • v.12 no.3
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    • pp.108-115
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    • 2020
  • Blended learning is a teaching method utilizing all the advantages in 'on and off-line' learning circumstances in order to enhance the learning effect and efficiency, more than the simple use of online factors in the classroom education. In this paper, we present the realization and simulation of algorithm for the realtime evaluation of low-grade and high-grade subjects in order to implement smart e-learning system, considering a lecture intelligibility. In order to grasp the levels of student's intelligibility, we simulated a function that automatically summarizes the study contents of class given by a lecturer. Especially, in administrator mode of smart e-learning system, we suggested and simulated a system in order to help the lecturer to easily manage the student's grades, and we have provided software to tell the student's intelligibility of lecture, analyzed the rate of incorrect answers, automatic judgment of lecture intelligibility and judge the weakest subject.

A study on ship automatic berthing with assistance of auxiliary devices

  • Tran, Van Luong;Im, Nam-Kyun
    • International Journal of Naval Architecture and Ocean Engineering
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    • v.4 no.3
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    • pp.199-210
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    • 2012
  • The recent researches on the automatic berthing control problems have used various kinds of tools as a control method such as expert system, fuzzy logic controllers and artificial neural network (ANN). Among them, ANN has proved to be one of the most effective and attractive options. In a marine context, the berthing maneuver is a complicated procedure in which both human experience and intensive control operations are involved. Nowadays, in most cases of berthing operation, auxiliary devices are used to make the schedule safer and faster but none of above researches has taken into account. In this study, ANN is applied to design the controllers for automatic ship berthing using assistant devices such as bow thruster and tug. Using back-propagation algorithm, we trained ANN with set of teaching data to get a minimal error between output values and desired values of four control outputs including rudder, propeller revolution, bow thruster and tug. Then, computer simulations of automatic berthing were carried out to verify the effectiveness of the system. The results of the simulations showed good performance for the proposed berthing control system.

A Study of the Automatic Berthing System of a Ship Using Artificial Neural Network (인공신경망을 이용한 선박의 자동접안 제어에 관한 연구)

  • Bae, Cheol-Han;Lee, Seung-Keon;Lee, Sang-Eui;Kim, Ju-Han
    • Journal of Navigation and Port Research
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    • v.32 no.8
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    • pp.589-596
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    • 2008
  • In this paper, Artificial Neural Network(ANN) is applied to automatic berthing control for a ship. ANN is suitable for a maneuvering such as ship's berthing, because it can describe non-linearity of the system. Multi-layer perceptron which has more than one hidden layer between input layer and output layer is applied to ANN. Using a back-propagation algorithm with teaching data, we trained ANN to get a minimal error between output value and desired one. For the automatic berthing control of a containership, we introduced low speed maneuvering mathematical models. The berthing control with the structure of 8 input layer units in ANN is compared to 6 input layer units. From the simulation results, the berthing conditions are satisfied, even though the berthing paths are different.

Topic modeling for automatic classification of learner question and answer in teaching-learning support system (교수-학습지원시스템에서 학습자 질의응답 자동분류를 위한 토픽 모델링)

  • Kim, Kyungrog;Song, Hye jin;Moon, Nammee
    • Journal of Digital Contents Society
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    • v.18 no.2
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    • pp.339-346
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    • 2017
  • There is increasing interest in text analysis based on unstructured data such as articles and comments, questions and answers. This is because they can be used to identify, evaluate, predict, and recommend features from unstructured text data, which is the opinion of people. The same holds true for TEL, where the MOOC service has evolved to automate debating, questioning and answering services based on the teaching-learning support system in order to generate question topics and to automatically classify the topics relevant to new questions based on question and answer data accumulated in the system. Therefore, in this study, we propose topic modeling using LDA to automatically classify new query topics. The proposed method enables the generation of a dictionary of question topics and the automatic classification of topics relevant to new questions. Experimentation showed high automatic classification of over 0.7 in some queries. The more new queries were included in the various topics, the better the automatic classification results.

A study on development of automatic welding system for corrugated membranes of the LNG tank (LNG 탱크의 주름진 내벽박판용 자동용접시스템의 개발에 관한 연구)

  • 유제용;유원상;나석주;강계형;한용섭
    • Journal of Welding and Joining
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    • v.14 no.1
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    • pp.99-106
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    • 1996
  • Development of an automatic TIG welding system incorporating a vision sensor and torch control mechanism leads to an improved welding quality and greater production efficiency. The automatic welding system should be greatly restricted in its size and weight for the LNG(Liquefied Natural Gas) storage tank and also provide a unique torch rotating mechanism which keeps the torch tip in the constant position while the angle is changed continuously to maintain the welding torch substantially perpendicular to the weld line. The developed system is driven by two translation axes X, Z and one rotational axis. A moving line window method is adopted to the image recognition of the corrugated membranes with specular reflection. This method decides original laser stripe patterns in image which is affected by multi-reflection. A self-teaching algorithm, which guides the automatic welding machine with the information provided by the CCD camera without any previous learning of a reference trajectory, was developed for tracking the corrugated membrane of the LNG tank along the weld line.

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Automatic Extraction of Component Window for Auto-Teaching of PCB Assembly Inspection Machines (PCB 조립검사기의 자동티칭을 위한 부품윈도우 자동추출 방법)

  • Kim, Jun-Oh;Park, Tae-Hyoung
    • Journal of Institute of Control, Robotics and Systems
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    • v.16 no.11
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    • pp.1089-1095
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    • 2010
  • We propose an image segmentation method for auto-teaching system of PCB (Printed Circuit Board) assembly inspection machines. The inspection machine acquires images of all components in PCB, and then compares each image with its standard image to find the assembly errors such as misalignment, inverse polarity, and tombstone. The component window that is the area of component to be acquired by camera, is one of the teaching data for operating the inspection machines. To reduce the teaching time of the machine, we newly develop the image processing method to extract the component window automatically from the image of PCB. The proposed method segments the component window by excluding the soldering parts as well as board background. We binarize the input image by use of HSI color model because it is difficult to discriminate the RGB colors between components and backgrounds. The linear combination of the binarized images then enhances the component window from the background. By use of the horizontal and vertical projection of histogram, we finally obtain the component widow. The experimental results are presented to verify the usefulness of the proposed method.

Automatic Manipulation of Tie Rod using Robot with 3D Sensing System

  • Ha, Jong-Eun;Lee, Wang-Heon
    • Journal of Electrical Engineering and Technology
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    • v.9 no.6
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    • pp.2162-2167
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    • 2014
  • Robots are widely used in various automation processes in industrial applications. Traditionally, it operated under fixed condition by teaching operating positions. Recently, diverse 2D/3D sensors are used together with robot to give more flexibility in operation. In this paper, we deal with automatic manipulation of tie rod in automotive production line. Sensor system consisted of a camera and slit laser is used for the acquisition of 3D information and it is used attached on the robot. Nut runner is used for the manipulation of stop nut and adjust bolt on the tie rod. Detailed procedures for the automatic manipulation of tie rod are presented. In the presented approach, we effectively use 3D information in whole procedure such as computing distance to the tie rod, rotation angle of bolt and nut. Experimental results show the feasibility of the proposed algorithm.