• Title/Summary/Keyword: Driving-system design

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Development of a Precision BLDC Servo Position Controller for Composite Smoke Bomb Azimuth Driving System (복합연막탄 선회구동장치를 위한 정밀 BLDC 서보 위치 제어기 개발)

  • Koo, Bon-Min;Choi, Sung-Jin;Choi, Jung-Keyung
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.10 no.3
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    • pp.467-472
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    • 2006
  • This study has been done to design a precise system and develop position control algorithm to control a Composite Smoke Bomb Azimuth driving apparatus of a BLDC servo motor. Having to Blind the sight of opposite tank. the Smoke Bomb Rotational driving system needs instant response that is able to detect opponent appearance and blast the bomb at a short time. So a design that shows fast current response capability or $300[Hz]\sim500[Hz]$ is proposed. in the MIN-MAX PWM technology is used to increase the operational speed. in order to control the blasting position, a precision position control algorithm that utilizes the integral value of speed trajectory is suggested. Also these characteristics are monitored and assessed by the PC based monitoring program which shows the graphs of current, voltage, position, and speed parameters. The main controller is based on a TMS320VC33 high performance floating-point DSP(Digital Signal Process) and the PWM generator utilizes EPM7128 CPLD.

Design of a New Flexible In-pipe Inspection Robot (새로운 구조의 유연한 배관탐사 로봇 설계)

  • Choi, Hyeung-Sik;Kim, Dong-Ho;Kim, Dong-Hyun;Lee, Jong-Hoon;Whang, Kwang-Il
    • Journal of Advanced Marine Engineering and Technology
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    • v.32 no.1
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    • pp.175-183
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    • 2008
  • In this paper, a new in-pipe inspection robot was developed for inspecting a large number of circular pipe insides of the sea plant, ships, and buildings. A new pressure generation system was devised to inspect circular pipes with different diameters and to move up and down slant or perpendicular slopes inside of the pipe. Also, a design method was analyzed to decide the capacity of driving motor for the robot if the mass and maximum velocity of the robot are identified. According to the design specification, a robot was developed and was tested to verify the performance of the pressure generation system. For tests, a control system was developed.

Development of the Expert system of Selecting a Servo-Motor in Feed Drive Unit of a Machiing Center (공작기계설계 지원 시스템 개발 -이송계 서보모터 선정에의 적용)

  • 장민제;이수홍;박면웅
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 2000.11a
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    • pp.199-202
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    • 2000
  • In this paper, we developed an expert system that helped a machine-tool designer to select a moderate servomotor of the feed drive unit of a machine tool. With the specification of the drive unit, it searches for the set of servo-motors that have enough torque and power to satisfy the driving condition which the designer defines from the database. me database also contains knowledge and rules, which describe the design process and calculate design parameters of a feed drive. The knowledge-based design support module shows every steps of inference and reason for the solution that it provides.

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Design and Implementation of Driving System for Face Tracking Camera using Fuzzy Control (퍼지제어를 이용한 얼굴추적 카메라 구동 시스템의 설계 및 구현)

  • 이종배;임준홍
    • Journal of the Institute of Electronics Engineers of Korea SC
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    • v.40 no.3
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    • pp.127-134
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    • 2003
  • In this paper, the speed control problem of moving camera is investigated for tracking the movement of the human-face. The camera system with pan-tilt mechanism sends an image to PC and PC sends back tracking coordinate to the camera. Then the camera tracks a human face in real time. The speed of the stepping motors for moving the camera must be controlled to the target region fast enough and smoothly, In this paper, a fuzzy logic controller is proposed for driving step motors. By creating driving acceleration and deceleration speed Profile, the speed of the motors is controled fast and smoothly. Experiments are performed to show the effectiveness of the proposed method.

Autonomous Traveling of Unmanned Golf-Car using GPS and Vision system (GPS와 비전시스템을 이용한 무인 골프카의 자율주행)

  • Jung, Byeong Mook;Yeo, In-Joo;Cho, Che-Seung
    • Journal of the Korean Society for Precision Engineering
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    • v.26 no.6
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    • pp.74-80
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    • 2009
  • Path tracking of unmanned vehicle is a basis of autonomous driving and navigation. For the path tracking, it is very important to find the exact position of a vehicle. GPS is used to get the position of vehicle and a direction sensor and a velocity sensor is used to compensate the position error of GPS. To detect path lines in a road image, the bird's eye view transform is employed, which makes it easy to design a lateral control algorithm simply than from the perspective view of image. Because the driving speed of vehicle should be decreased at a curved lane and crossroads, so we suggest the speed control algorithm used GPS and image data. The control algorithm is simulated and experimented from the basis of expert driver's knowledge data. In the experiments, the results show that bird's eye view transform are good for the steering control and a speed control algorithm also shows a stability in real driving.

The Property Analysis of Ceramic Metal-Halide Lamp Considering Acoustic Resonance Phenomenon and Design of Inverter by the PSpice Simulation (음향 공명 현상을 고려한 세라믹 메탈핼라이드의 특성 분석과 PSpice 시뮬레이션을 통한 인버터 설계)

  • Jang, Hyeok-Jin;Kim, Nam-Goon;Yang, Jong-Kyung;Lee, Jong-Chan;Park, Dae-Hee
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.58 no.10
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    • pp.1989-1994
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    • 2009
  • This study purposes are improvement of system (lamp & ballast) efficacy with and optical characteristics through the developed ceramic arc tube. The designed electronic ballast is substituted for conventional magnetic ballast. These electric signal and optical, thermal characteristics through the improving efficacy of lighting system compared with conventional magnetic ballast. properties of lamp by driving method is researching in ballast. Particularly, electronic ballasts, which improved against weakness of Magnetic Ballast, are researching and applying to control of ceramic metal-halide lamp. but One major limitation is the acoustic resonance problem in CMH lamps at high-frequency operation. In order to avoid acoustic resonance, driving frequency decided 21[kHz]. Before discharge in this paper. The PSpice simulation result obtained sufficient voltage gain and the ignition voltage obtained over 3[kV] at 75[kHz]. After discharge, driving voltage obtained approximately 90[Vrms] at 21[kHz].

Design and Optimization of Intelligent Service Robot Suspension System Using Dynamic Model (동역학 모델을 활용한 서비스용 지능형 로봇의 현가 시스템 설계 및 최적화)

  • Choi, Seong-Hoon;Park, Tae-Won;Lee, Soo-Ho;Jung, Sung-Pil;Jun, Kab-Jin;Yun, Ji-Won
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.34 no.8
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    • pp.1023-1028
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    • 2010
  • Recently, an intelligent service robot is being developed for use in guiding and providing information to visitors about the building at public institutions. The intelligent robot has a sensor at the bottom to recognize its location. Four wheels, which are arranged in the form of a lozenge, support the robot. This robot cannot be operated on uneven ground because its driving parts are attached to its main body that contains the important internal components. Continuous impact with the ground can change the precise positions of the components and weaken the connection between each structural part. In this paper, the design of the suspension system for such a robot is described. The dynamic model of the robot is created, and the driving characteristics of the robot with the designed suspension system are simulated. Additionally, the suspension system is optimized to reduce the impact for the robot components.

The Analysis and Optimization far the Braking System in Electric Vehicle (전기자동차용 제동 시스템 해석 및 최적화에 관한 연구)

  • 오재응;이준일;이충휘;조용구;이유엽;이정윤
    • Transactions of the Korean Society of Automotive Engineers
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    • v.11 no.1
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    • pp.172-178
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    • 2003
  • Driving range is one of the main problems in development of Electric Vehicles(EV). The Regenerative. braking system is required to overcome the problem, which converts kinetic energy of the vehicle during braking into electrical energy. This paper discusses the braking system of EV and Robust design especially developed to maximize energy recovery and to optimize braking performance. This is promised to be applied to the design of elements for EV braking system.

An Event-Driven Failure Analysis System for Real-Time Prognosis (실시간 고장 예방을 위한 이벤트 기반 결함원인분석 시스템)

  • Lee, Yang Ji;Kim, Duck Young;Hwang, Min Soon;Cheong, Young Soo
    • Korean Journal of Computational Design and Engineering
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    • v.18 no.4
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    • pp.250-257
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    • 2013
  • This paper introduces a failure analysis procedure that underpins real-time fault prognosis. In the previous study, we developed a systematic eventization procedure which makes it possible to reduce the original data size into a manageable one in the form of event logs and eventually to extract failure patterns efficiently from the reduced data. Failure patterns are then extracted in the form of event sequences by sequence-mining algorithms, (e.g. FP-Tree algorithm). Extracted patterns are stored in a failure pattern library, and eventually, we use the stored failure pattern information to predict potential failures. The two practical case studies (marine diesel engine and SIRIUS-II car engine) provide empirical support for the performance of the proposed failure analysis procedure. This procedure can be easily extended for wide application fields of failure analysis such as vehicle and machine diagnostics. Furthermore, it can be applied to human health monitoring & prognosis, so that human body signals could be efficiently analyzed.

Design and Implementation of a Smart Signage System based on the Internet of Things(IoT) for Elevators

  • Ryu, Hyunmi;Lee, Guisun;Park, Sunggon;Cho, Sungguk;Jeon, Byungkook
    • International journal of advanced smart convergence
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    • v.8 no.3
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    • pp.184-192
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    • 2019
  • The existing digital signage systems inside the elevators are a lack of tailored contents appropriate to the space and environment inside or outside the elevators. Also, they almost impossible to flexibly respond to various contents disclosure according to the demand of the consumers or the elevator markets. Therefore we design and implement an IoT(Internet of Things)-based smart digital signage system for the safety of elevator passengers.. In order to provide IoT-based information to the smart digital signage within the elevator, we propose an IoT system as a set-top box with gyroscope sensor, acceleration sensor, RFID(Radio-Frequency Identification), fine dust sensor, etc., which processes various data collected by the sensors and provides the elevator passengers with various tailored contents such as elevator driving information, environmental information inside and outside the elevator, and disaster information in addition to simple advertisement information. The proposed IoT system is a set-top box that operates the smart digital signage and has an independent information control processor based on the IoT sensors that do not depend on the elevator control system. For the proposed smart digital signage, it supports an operating system that is independent of the elevator driving service as well as the media service. So the smart signage system has a characteristic that it does not depend on the elevator control system since it is a stand-along IoT-based information control system. With the proposed system providing intuitive content for the surge, steep descent, and radical movements of an elevator due to an emergency situation, the elevator passengers should be able to recognize the situation quickly and respond accordingly. In the near future, the proposed system will expand the market of digital signage applied in conjunction with the development of contents in the disaster, safety and environment fields, and expect expected to revitalize related industries associated with signage.