• The Journal of the Korea institute of electronic communication sciences
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• v.10 no.3
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• pp.327-332
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• 2015

Educational robot was introduced as an effective educational tool is to foster scientific creativity and learn the basic principles of science are applied to change the configuration of the educational after-school learning kits for science education. SMEs as a tool to foster scientific creativity center and a variety of educational robot technology and the wide range of games for students and robotic technology development, existing e-Learning by downloading mp3 music or learning content for the robot, such as the provision of specialized content Although the technology is still being developed to take advantage of the professional community formation is insufficient side. Currently, one-point linkage drag Smart Touch control dynamic motor development does not need this motor development is possible for users to easily.

• The Journal of the Korea institute of electronic communication sciences
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• v.17 no.5
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• pp.833-840
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• 2022

The precision of automation equipment and motors in factories is required, and global motor market has increased significantly. However, domestic motor technology lags behind foreign technology. In this thesis, the precision stability and efficiency were compared with a linear algorithm by applying a non-linear algorithm to a PLC servo motor and an Arduino step motor in order to improve the technology of the motor. The nonlinear algorithm was able to shorten the same driving reference time because the maximum speed of the motor was faster than the linear algorithm, and it was confirmed that the precision was improved due to the low curvature.

• Proceedings of the Korean Institute of Intelligent Systems Conference
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• 2002.12a
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• pp.102-105
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• 2002

다기능 휠체어 시스템의 제어부인 80C196KC를 사용했으나, fuzzy 알고리즘을 적용하는데 있어서 여러 가지 문제점(속도, 연산, 외부장치 등) 때문에 구현1차는데 상당한 어려움이 있었다. 이를 해결하기 위해 20MIPS의 속도인 TMS320F240의 프로세서를 사용하였으며 이로 인해 발생하는 문제점을 거의 해소시켰고, 퍼지 알고리즘을 효율적으로 적용할 수 있었다. 본 시스템의 구성은 주제어기로 퍼지 제어 알고리즘을 사용하여 조이스틱을 제어시켰고, 2개 encoder를 입력을 받아 휠체어 회전수를 이용하여 제어시켰다. 휠체어 모터로는 BLDC(Brushless DC) 모터를 사용했으면, BLDC전용 드라이브단을 이용하여 모터를 구현시켰다. 그리고 3개의 초음파 센서를 부착하여 장애물 회피를 시도하였다. 초음파센서의 효율적인 사용을 위해 스텝 모터(Stepping Motor)와 마이크로 컨트롤러로 PIC을 사용하였다. 본 논문의 실험 결과에서는 이전의 제어기(80C196KC)보다 현저히 성능 면에서 향상되었고, 부수적인 외부장치 처리면에서도 상당한 차이를 볼 수 있었다

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.15 no.6
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• pp.71-77
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• 2015

In this paper, we propose a scheduling method for signal measurement and control algorithm execution in a multi-motor drive controller. The multi-motor controller which is used for vehicle control receives position/velocity command and performs position/velocity control and current control. Internal resource allocation and control algorithm execution timing are very important when one microcontroller is used for multi-motor drives. The control performance of the velocity control system is verified by varying ADC(Analog to Digital Converter) conversion timing and algorithm execution timing using real experiments.

• Journal of Korea Society of Industrial Information Systems
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• v.22 no.5
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• pp.25-30
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• 2017

In this Paper, we Propose the Low-cost Obstacle Recognition System Utilizing the Ultrasonic Sensor. Developed Obstacle Recognition System can be used to Aid the Visually Impaired Person. The Existence of the Obstacle is Notified to the Person through the Embodied Electronic Vibration Motor. The Timing Difference from the Recognition to the Notification Indicates the Distance to the Obstacle. Pulsed Ultrasonic Signal Controlled by MCU is Utilized and the Reflected Pulse through the Obstacle gives the Developed System the Existence of the Obstacle and the Distance to the Object. Pulse is sent Repetitively to Improve the Detection Accuracy. Developed Apparatus gives 30 Degree of Detection Angle and 2cm-30cm of the Detection Range when the Apparatus is Tested under Normal Walking Environment.

• Journal of the Institute of Convergence Signal Processing
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• v.25 no.2
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• pp.52-57
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• 2024

To measure the vortex structures within the turbulent boundary layer, a hot-wire sensor was mounted on a stepper motor controller and moved to the designated measurement points. Near the surface within the flow field, the velocity is relatively slow, making the measurements highly sensitive to electromagnetic interference (EMI) during signal processing. This EMI primarily originates from the power supplies of computers and other electronic equipment. In our experimental setup, EMI was introduced into BNC cables connected to the hot-wire sensor from the powered stepper motor. When power was supplied to the motor controller to move the hot-wire sensor, EMI appeared on the oscilloscope screen. Consequently, unexpected noise was present in the data measured by the hot-wire sensor. To mitigate this and enhance the signal-to-noise ratio (SNR) during measurements, the connecting cables were shielded, and an old computer without EMI shielding was replaced.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.13 no.4
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• pp.1777-1783
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• 2012

In this paper, a new motor driving circuit is designed to improve the output performance of DC motor, and a controller is developed with the designed circuit. By the designed driving circuit, a controller can continuously drive DC motors by a transformer which has switching signals of a self-generated circuit to operate it. And while the DC motor have a maximum velocity, the reference voltage can be maintained higher value than that of triangle voltage and it makes the DC motor driving transistor ON and maximum power. A 24V-500W DC motor controller is developed with the proposed motor driving circuit, and also a small electric car is made and the driving test of it is executed. The test results shows that it can continuously control go and back speed of motor with 12A driving current. And also, it is verified that the over current and heat detecting function is operating correctly and the rest value of the used battery can be displayed as 6 step from 20 to 100%.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 2009.06a
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• pp.193-193
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• 2009

Thin-type 초음파모터의 구조는 크로스형태의 앓은 스테이터에 윗면과 아랫면에 각각 8개의 압전세라믹이 부착된 형태이고, 압전세라믹의 분극방향은 로터와 접촉하는 스테이터의 중심부인 네 개의 타점에서 순차적인 타원변위가 생성되도록 결정된다. 유한요소해석프로그램인 ATILA 5.2.4를 사용하여 형태, 길이, 두께, 스테이터 재질, 클램프특성이 최적 설계된 모델을 제작하였고, 푸쉬풀 게이지, x-y 스테이지, rpm 메터, 토크 게이지, 맨코더, AD컨버터를 이용하여 피드백 제어 구동시스템을 구성하였다. 그림 I은 마이크로컨트롤러 (ATmega)와 피드백회로를 이용한 구동 드라이버를 보여준다. 한 주기에서 1/4분주의 순차적인 네 개의 구형파를 생성하고, 이를 push-pull회로를 통하여 90도의 위상차가 나는 정현파를 생성하여 초음파 모터의 구동전원으로 사용한다. 피드백 회로인 엔코더와 AD 컨버터는 초음파모터의 속도를 피드백하여 정속도 운전을 위한 전압제어에 사용되었다. 특성 측정 결과, 제품화된 드라이버와 비교하여 큰 차이를 보이지 않았고 피드백 회로를 통하여 부하변화에 따른 속도의 극심한 변화를 0.2~0.4[N]의 범위에서 정속도 운전이 가능하였으며, 장시간의 운전에도 온도 및 속도특성이 안정적임을 확인하였다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2013.10a
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• pp.612-615
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• 2013

Hub BLDC(Brushless Direct Current) motor, called wheel-in motor is a outer rotor type high efficient direct driving motor which have a multi-pole permanent magnet type rotor as a driving wheel. This study shows a hub BLDC motor speed controller design methode using PIC micro controller to drive 2 wheels or 3 wheels driving body having hub motor driving shaft. The motor driver unit consists of six discrete MOSFET switching devices and the gate driving module is directly designed for high economy.

• 한국HCI학회:학술대회논문집
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• 2007.02a
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• pp.115-122
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• 2007

이 논문에서는 동작기반 체험형 리모트 콘트롤러가 사용자와 상호작용을 하기 위해 갖춰야 할 기본적인 요소가 무엇인지 설명하고 체험형 리모트 콘트롤러의 동작 정보를 처리하는 시스템의 구성을 제안한다. 동작기반의 체험형 리모트 컨트롤러는 블루투스로 서버와 양방향 통신을 하게 되며 가속도 센서가 장착되어 기존의 버튼입력 기반의 리모트 컨트롤러와는 달리 동작을 이용한 입력을 할 수 있고 사용자에게 진동모터를 통한 촉감 피드백을 전해주어 사용자의 몰입감을 증가시킬 수 있도록 하였다. 가속도 센서를 이용한 동작 인식을 위해서는 두 가지 알고리즘이 개발되어 적용되었다. 동작기반의 체험형 리모트 컨트롤은 논문에 제시된 예 이외에도 기존의 버튼 기반으로 만들어진 응용프로그램에 쉽게 적용시킬 수 있으며 특히 엔터테인먼트 분야에서 사용자의 흥미와 몰입감을 더해주기 위해 사용될 것으로 기대된다.