• Title, Summary, Keyword: System Control

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Design and Manufacture of a Machine Tool Control System for Workpiece Automatic Loading System (공작기계용 공작물 자동 적재장치의 제어장치 설계 및 제작)

  • An, Jun-Hwan;Kim, Gab-Soon
    • Journal of the Korean Society of Manufacturing Process Engineers
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    • v.18 no.6
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    • pp.62-68
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    • 2019
  • In this paper, we describe the design and manufacture of a control system for an automatic loading system that inserts and removes workpieces after machining. The control system was manufactured using DSP for high speed and consists of a power unit, a control unit, a communication unit, and a display unit. We connected the control system to the mechanical system of the automatic workpiece loader to test the characteristics, which allowed us to raise and lower the automatic workpiece loading system to the desired position. The successful test demonstrates that we can use the control system to control the workpiece automatic loading system.

Hybrid Control with a Bang-Bang Type Controller (Bang-Bang 형태의 제어기를 갖는 복합제어)

  • 박규식;정형조;조상원;이인원
    • Proceedings of the Computational Structural Engineering Institute Conference
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    • pp.193-200
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    • 2003
  • This paper presents a hybrid (i.e., integrated passive-active) system for seismic response control of a cable-stayed bridge. Because multiple control devices are operating, a hybrid control system could alleviate some of the restrictions and limitations that exist when each system is acting alone. Lead rubber bearings are used as passive control devices to reduce the earthquake-induced forces in the bridge and hydraulic actuators are used as active control devices to further reduce the bridge responses, especially deck displacements. In the proposed hybrid control system, a linear quadratic Gaussian control algorithm is adopted as a primary controller. In addition, a secondary bang-bang type (i.e., on-off type) controller according to the responses of lead rubber bearings is considered to increase the controller robustness. Numerical simulation results show that control performances of the hybrid control system are superior to those of the passive control system and slightly better than those of the fully active control system. Furthermore, it is verified that the hybrid control system with a bang-bang type controller is more robust for stiffness perturbation than the active controller with μ-synthesis method and there are no signs of instability in the overall system whereas the active control system with linear quadratic Gaussian algorithm shows instabilities in the perturbed system. Therefore, the proposed hybrid protective system could effectively be used to seismically excited cable-stayed bridges.

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Optimal Design of Hybrid Control System through Inter-Building Connection (빌딩간 연결을 통한 복합제어시스템의 최적설계)

  • Park, Kwan-Soon;Ok, Seung-Yong
    • Journal of the Korean Society of Safety
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    • v.32 no.6
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    • pp.81-88
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    • 2017
  • This study deals with the optimal design of a hybrid control system composed of a combination of active control system and passive control system for effective seismic performance improvement of two adjacent structures. The proposed hybrid control system adopts a configuration of installing an active control device in one building and connecting two adjacent structures with a passive control device so that the one-side active control force can be bi-directionally applied to both buildings through the passive connecting devices. In order to derive the optimal performance of the proposed system, the design parameters of the passive and active control systems were searched using the genetic algorithm. Numerical simulations of 10-story and 8-story buildings have been performed to verify the effectiveness of the proposed technique. For the purpose of comparison, the conventional independent control system with two identical active control systems being installed separately for each structure was also optimally designed and its seismic response has been evaluated as well. From the comparative results of the two control systems, it is demonstrated that the proposed hybrid control system requires larger control force for its one-side active control device than the conventional independent control system does for each of both-side active devices, but quite less than the total control force required for both-side devices of the independent control system, while maintaining similar seismic performance. Therefore, the proposed system is more economical and reliable than the conventional independent control system with two identical active devices.

Development of Low-Cost Automatic Flight Control System for Unmanned Target Drone

  • Lee, Jang-Ho;Ryu, Hyeok;Kim, Jae-Eun;Ahn, Iee-Ki
    • 제어로봇시스템학회:학술대회논문집
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    • pp.367-371
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    • 2004
  • This paper describes development of automatic flight control system for an unmanned target drone which is operated by Korean army as for anti-air gun shooting training. Current target drone is operated by pilot control of on-board servo motor via remote control system. Automatic flight control system for the target drone greatly reduces work load of ground pilot and can increase application area of the drone. Most UAVs being operated now days use high-priced sensors as AHRS and IMU to measure the attitude, but those are costly. This paper introduces the development of low-cost automatic flight control system with low-cost sensors. The integrated automatic flight control system has been developed by integrating combining power module, switching module, monitoring module and RC receiver as an one module. The performance of automatic flight control system is verified by flight test.

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A Model of a Mechanical Flight-Control System for Simulating Control Authority Switching of a Helicopter Technical Demonstrator (헬리콥터 기술시범기의 비행제어 조종권 전환 모의를 위한 기계식 조종장치 모델 설계 연구)

  • Yang, Chang Deok
    • Journal of Aerospace System Engineering
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    • v.11 no.2
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    • pp.23-29
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    • 2017
  • Since the flight-control system is critical for the safety of an aircraft, a fail-safe system is needed in a flight demonstrator used to test a new flight-control system. A backup control system is also needed to ensure safety in using a mechanical flight-control system. This paper presents a development of an MFCS (Mechanical Flight Control System) model for simulating control authority switching of a helicopter technical demonstrator, as well as the results of evaluating the developed MFCS model.

A Study on the Integration Control System Development for Smoke Control (연기제어를 위한 통합제어시스템 개발에 관한 연구)

  • Lee, Dong-Myung
    • Journal of Korean Society of Hazard Mitigation
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    • v.6 no.4
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    • pp.15-20
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    • 2006
  • This study developed integration control system that improve efficiency and give flexibility of smoke control system and can improve prevention of disasters performance. The reliable each kind sensor and of integration control system was developed by establishing the specifications, algorithms and constructing engineering data. More correct and reliable control function of optimization can be obtained by the central control from integration control system rather than the existent individual control. This sees to do to impose flexibility to smoke control system. Also, this will provide the basics of integration control system and ability security of smoke control system and can construct smoke control system of performance based.

Greenhouse Control with PV System

  • Kim, Kee Hwan
    • International Journal of Advanced Culture Technology
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    • v.1 no.1
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    • pp.6-10
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    • 2013
  • The greenhouse control system for educational purpose is designed by personal computer. This system should observe and control the growth conditions for crops in both plastic film and glass greenhouses. In this contribution puts emphasis on construction of greenhouse control system by personal computer under the aim of creating safer, more effective and more economical services. This system is developed for the requirements of the intelligent greenhouse control system and is powered by solar energy. A photovoltaic system with sun tracking module is used for the greenhouse control system.

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A Study on Control Parameter Tuning for Actuator in Control Loading System (조종 반력 시스템에서의 액츄에이터 제어 파라미터 조정에 관한 연구)

  • Yoon, Tae-Sung;Park, Seung-Gyu;Park, Joon-Ho;Kim, Tae-Kue
    • Proceedings of the KIEE Conference
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    • pp.249-251
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    • 2006
  • In this study, a systematic and effective tuning method of the actuator control parameters of the control loading system for aircraft based on control theory is presented. Firstly, to raise the time response of the system, the proportional gain and the integral gain of the velocity control loop is maximized within the range where vibration and noise does not occur. And then the position control loop is composed by getting the transfer function of the control loading system including the velocity control loop. With the root locus of the composed position control loop, the proportional gain of the position control loop that keeps stable transient state and leads good time response of the system is predicted, and the simulations are performed by using the predicted gain. Lastly, the actuator control parameters of actual control loading system are set to the previously obtained gain values. And the experiments to actuate the control loading system are executed. It shows that the tuning method of the actuator control parameter proposed in this study is applied to actual control loading system very well by comparing the results of the experiments with those of the simulations.

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Development of Dual System Technology for PC based control system at the steel plant

  • Park, Yeong-Bok
    • 제어로봇시스템학회:학술대회논문집
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    • pp.179.3-179
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    • 2001
  • This paper describes the dual system technology of PC based control system at steel plant. Because PC is developed to be used in wide area such as Office Automation, Personal, It is cheaper and more portable than the present process control system, but is less stable and less reliable. In this research, We gathered the fault example of a general process control system and steel process control system, analyzed the cause of fault and decided the target fault that took over in our proposed system. The proposed PC based system is the dual system that has a shared RAID system connected by SCSI bus between two systems. In order to assist system reliability, we proposed watchdog manager to monitor ...

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